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Results 2401 to 2430 of 4099:

Secondary dormancy of seeds in relation to the Bromus tectorum-Pyrenophora semeniperda pathosystemOriginal Paper

Katie Karen HAWKINS, Phil ALLEN, Susan MEYER

Plant Protect. Sci., 2013, 49(10):S11-S14 | DOI: 10.17221/30/2013-PPS

Bromus tectorum is a highly invasive annual grass. The fungal pathogen Pyrenophora semeniperda can kill a large fraction of B. tectorum seeds. Outcomes in this pathosystem are often determined by the speed of seed germination. In this paper we extend previous efforts to describe the pathosystem by characterising secondary dormancy acquisition of B. tectorum. In the laboratory approximately 80% of seeds incubated at -1.0 MPa became dormant. In the field, seeds were placed in the seed bank in late autumn, retrieved monthly and dormancy status determined. The field study confirmed the laboratory results; ungerminated seeds became increasingly dormant. Our data suggest that secondary dormancy is much more likely to occur at xeric sites.

Compost as growing media component for salt-sensitive plantsOriginal Paper

T.C.V. Do, H.W. Scherer

Plant Soil Environ., 2013, 59(5):214-220 | DOI: 10.17221/804/2012-PSE

Composting has been considerably recognized as a viable management method for solid organic wastes aimed at recycling of its end-product as a potting substrate for ornamental plants. Pelargonium and Salvia as salt-sensitive plants were grown in the mixture of compost (75, 50, 25% by volume) and additives (Hygromull, Cocofiber and SPS-standard soil type 73 with 70% peat and 30% clay). Since plants may suffer from a high salt content, thus in a further experiment compost was added as a partial substitute for peat. The results of the first pot experiment reveal that the large percentage of compost in the substrate had negative effects on plant growth and nutrient uptake (N, P, K and Na). Both yield formation and nutrient uptake significantly increased and almost gained levels of those in the control in the second pot experiment when plants were grown in peat-based substrates. Especially, the growth of Salvia was significantly improved. Consequently, the compost-based media (> 50% volume of compost) cannot be recommended for salt sensitive ornamental plants, while less than 25% of compost incorporated into peat creates peat-based substrates which reasonably enhanced growth of Pelargonium and Salvia.

Source capacity during flowering affects grain yield of amaranth (Amaranthus sp.)Original Paper

B. Roitner-Schobesberger, H.-P. Kaul

Plant Soil Environ., 2013, 59(10):472-477 | DOI: 10.17221/528/2013-PSE

Amaranth is a promising C4-crop. However, for a wider spread of the crop a better understanding of factors that are influencing yield formation is crucial for optimizing the plant phenotype and enhancing yield. The present study wanted to clarify the effects of assimilate sources and sinks on yield formation by artificially altering source or sink size. Field experiments were conducted in Eastern Austria during three years with three genotypes, applying source-sink manipulation treatments at mid flowering (control, 50% of inflorescence removed, 50% or 100% of leaves removed). At maturity we measured shoot, inflorescence and grain dry matter, thousand kernel mass and number of seeds per plant. An average grain yield level of about 3.5 t/ha dry matter on control plots indicated favorable growth conditions for amaranth in general. The removal of all leaves had a strong detrimental effect on all parameters, but severity of yield reduction due to defoliation differed between genotypes, ranging from -49% to -73%. Contrastingly, 50% flower reduction did not have any significant effects. Also with 50% defoliation no significant yield reduction was observed. We conclude that source strength of amaranth during flowering is more yield limiting than its sink capacity.

Molecular markers in the improvement of Allium cropsReview

Lakshmana Reddy Dhoranalapalli CHINNAPPAREDDY, Kiran KHANDAGALE, Aswath CHENNAREDDY, Veere Gowda RAMAPPA

Czech J. Genet. Plant Breed., 2013, 49(4):131-139 | DOI: 10.17221/111/2013-CJGPB

The genus Allium (Family: Alliaceae) is the most important among the bulbous vegetable crops. characterization of Alliums based on phenotypic traits is influenced by the environment and leads to biased diversity estimates. Recognizing the potential of DNA markers in plant breeding, researchers have adopted the molecular markers for marker-assisted selection (MAS), quantitative trait loci (QTL) mapping and characterization of different quality traits in Alliums. This review presents details about the use of DNA markers in Alliums for cultivar identification, diversity studies, SSR development, colour improvement, total soluble solids (TSS), cytoplasmic male sterility (CMS) and efforts of DNA sequencing. As there are no such reports to describe the above work under a single heading, we decided to mine literature for those who are working in onion, garlic, chives and leek improvement to generate new insights in the subject.

The morphology of the arteries originating from the arcus aorta and the branches of these arteries in mole-rats (Spalax leucodon)Original Paper

A. Aydin, Z.E. Ozkan, R. Ilgun

Vet Med - Czech, 2013, 58(7):373-376 | DOI: 10.17221/6918-VETMED

In this study, the aim was to investigate the anatomy of the aortic arch arteries in mole-rats (Spalax leucodon). Six adult mole-rats were used for this purpose. Coloured latex was injected into the left ventriculus of the hearts of all animals. The materials were carefully dissected and the arterial patterns of arteries originating from the aortic arch were examined. The brachiocephalic trunk, the left common carotid and the left subclavian arteries were detached from the aortic arch. The brachiocephalic trunk separated into the right subclavian and common carotid arteries. The branches separating from the subclavian arteries were on the right, the common branch giving the profund cervical, the internal thoracic, and the costocervical trunk, and on the left the internal thoracic and the costocervical trunk were in the common root and the profund cervical artery was independent and on both sides after giving the common branch of the superficial servical and the external thoracic artery. This continued as the axillary artery which was then separated into the subscapular and the brachial arteries. Thus, the arteries originating from the aortic arch and the branches of these arteries were found to be different from other rodents and domestic mammals.

Analysis of price changes of selected roundwood assortments in some Central Europe countries

J. Suchomel, M. Gejdoš, L. Ambrušová, R. Šulek

J. For. Sci., 2012, 58(11):483-491 | DOI: 10.17221/98/2011-JFS

The paper deals with the analysis of price changes of roundwood (spruce, fir and beech sawlog, fuelwood) and energy wood in Slovakia, Czech Republic and Austria during the period of 2008-+September 2011. At the beginning of the article, the authors identify the major factors influencing timber price trends such as legislation regarding technical standards for the quality grading of round wood, global economic recession, incidental felling and political influence. Consequently, detailed analysis of timber price changes in selected European counties is provided by means of line graphs. The results of the analysis revealed that demand for wood and wood products began to decrease in mid-2008. The most critical situation was in 2009, primarily in the softwood market, when prices bottomed out. However, recent trends indicate a gradual rise in timber prices. In the future, a slight increase of timber prices is expected, however other factors (such as economic development, lobbyist pressure, incidental felling and many others) may influence prices, which makes it difficult to predict their trend.

Species diversity of true bugs on apples in terms of plant protectionOriginal Paper

Karel Hradil, Václav Psota, Pavla Šťastná

Plant Protect. Sci., 2013, 49(2):73-83 | DOI: 10.17221/30/2012-PPS

Monitoring of species spectrum of true bugs (Heteroptera) on apple trees without pest management was conducted in 2010-2011. Two sites were selected - an abandoned orchard and a road alley near the village of Velké Bílovice (Břeclav district, Czech Republic). The capture of true bugs with a fogger device (Pulsfog) on five selected trees in each site was performed. The effective substance deltamethrin at concentration of 0.0025 g/l was applied to the tree crowns. Three collections (28/4, 20/5, and 9/7) in 2010 and two (11/5 and 23/6) in 2011 were done. Out of 55 detected species of true bugs, 43 species occurred in the alley and 29 in the orchard. Thirty-two species were predatory or partly predatory (58.18%), 22 species were phytophagous (40%), and one mycetophagous (1.82%).

Determination of water-insoluble β-D-glucan in the whole-grain cereals and pseudocereals

Bernadetta Hozová, Ľudovít Kuniak, Petra Moravčíková, Alena Gajdošová

Czech J. Food Sci., 2007, 25(6):316-324 | DOI: 10.17221/747-CJFS

Water-insoluble β-(1,3)-D-glucan (lichenan) was determined in 43 samples of various cereal (oats, barley, wheat, millet) and pseudocereal (buckwheat, amaranth) cultivars using a modified procedure with fungal α-amylase (Fermizyme P 300). The content of water-insoluble β-glucan varied in the dependence on the cereal species and cultivars. The highest content was registered in covered oat cultivars (Cyril and the new breeding cultivar PS-100) ranging from 26.7 to 28.2 g/100 g dry matter (d.m.) followed by less traditional cereals such as millet (Panicum miliaceum L.), amaranth (Amaranthus sp. L.), and buckwheat (Fagopyrum) - more than 20 g/100 g d.m. A somewhat lower average content of water-insoluble β-glucan was found in wheat - 12.7-16.2 g/100 g d.m., in spelt wheat - 8.5 g/100 g d.m., and in oats - varying between 15.3 and 18.7 g/100 g d.m.

Composition and sensory analysis for quality evaluation of a typical Italian cheese: influence of ripening periodOriginal Paper

Patrizia PAPETTI, Angela CARELLI

Czech J. Food Sci., 2013, 31(5):438-444 | DOI: 10.17221/447/2012-CJFS

Caciottina massaggiata di Amaseno, a typical dairy product of the Lazio Region prepared from buffalo milk, was analysed for moisture, fat, protein, pH, and acidity content at different storage (0, 3, 6, and 9 months after production). Cheeses were also evaluated for various sensory attributes (taste, flavour, texture, and overall acceptability) during storage. We evaluated the flavour profile and acceptability of Caciottina cheeses of varying maturity using a descriptive analysis. Descriptive sensory profiles of selected cheeses were determined using a trained panel (n = 12) and an established cheese flavour sensory language. In quantitative descriptive analysis a trained panel rated the cheeses for colour, odour, taste and texture. In the affective tests the panellists evaluated the samples for overall quality. The results proved that months of production had significant effects on the sensory quality of the cheeses.

Accumulation and subcellular distribution of cadmium in ramie (Boehmeria nivea L. Gaud.) planted on elevated soil cadmium contentsOriginal Paper

Q.H. Zhu, D.Y. Huang, S.L. Liu, Z.C. Luo, Z.X. Rao, X.L. Cao, X.F. Ren

Plant Soil Environ., 2013, 59(2):57-61 | DOI: 10.17221/439/2012-PSE

The tolerance, accumulation and subcellular distribution characteristics of cadmium (Cd) in ramie (Boehmeria nivea L. Gaud.) were investigated using a 2-year field experiment. The results indicated that ramie has a certain extent of tolerance to soil Cd (≤ 20 mg/kg) contamination with no significant decrease in shoot biomass and fibre yield relative to control conditions. Although ramie did not hyperaccumulate Cd, it accumulated considerable amount of Cd in the aboveground parts (approximately 0.19 to 1.09 kg/ha annually). The Cd contents retained in ramie tissues were found in order of roots > stems > leaves. Further, regarding the subcellular distribution of Cd in ramie tissues, 80% of the total Cd was bound to the cell walls of the roots and stems, whereas in leaves the proportion of Cd stored in the cell wall fraction was around 60% and a lesser amount of Cd was stored in the soluble fraction (24.1-25.5%). Our collective results indicated that ramie adapts to Cd stress via the store of a large amount of Cd in cell walls, and suggested potential usefulness of ramie in the phytoremediation of Cd-contaminated farmlands.

Photosynthesis and growth responses of peanut (Arachis hypogaea L.) to salinity at elevated CO2Original Paper

P. Ratnakumar, G. Rajendrudu, P.M. Swamy

Plant Soil Environ., 2013, 59(9):410-416 | DOI: 10.17221/182/2013-PSE

Four peanut (Arachis hypogaea L.) cultivars (cvs. TPT-1, TPT-4, JL-24 and TMV-2) were grown in open-top chambers at 350 and 600 µmol CO2/mol in soil amended with 0 (control), 50, 100 and 200 mmol solutions of NaCl. The net photosynthetic rate (Pn), stomatal conductance (gs), transpiration (E) and dry biomass of leaf, stem and root were measured on 60 days after sowing. The plant growth and photosynthesis increased in both NaCl treated and control plants with elevated CO2. The gs and E decreased under elevated CO2 and the CO2 effect was highly significant under salt stress mitigating the adverse effect on these components in all the four cultivars tested. A positive correlation was observed between Pn and dry biomass under elevated CO2 and salt stress. Enhanced CO2 helps to increase growth and photosynthesis in peanut cultivars and it ameliorates the adverse effects induced by salt stress.

Growth and survival rates, puberty and fecundity in captive common barbel (Barbus barbus L.) under controlled conditions

T. Policar, P. Podhorec, V. Stejskal, P. Kozák, V. Švinger, S.M. Hadi Alavi

Czech J. Anim. Sci., 2011, 56(10):433-442 | DOI: 10.17221/3236-CJAS

Growth and survival rates (specific growth rate - SGR; survival rate - S) of Barbus barbus L. were recorded in captivity during three years from the larval period (final body weight - W = 0.2 ± 0.03 g; SGR = 13.6 ± 1.1%/day and cumulative survival - S = 76.0 ± 2.5%) to the first reproductive season (W = 62.55 ± 13.5 g; SGR = 0.89 ± 0.05%/day; S = 59.3 ± 1.5%). Final body size and SGR were compared between both sexes. Females reached the significantly higher growth rate (SGR = 0.84 ± 0.01%/day) compared to males (SGR = 0.77 ± 0.01%/day). Early puberty was observed in 17 and 32 months old males and females, respectively. Multi-stripping activity was found out in both sexes during the first reproductive season. In total, 20%, 25.8%, 30.3%, 14.6% and 9% of females were stripped once, twice and three, four and five times, respectively. But all males produced sperm during the entire reproductive season. The highest and the lowest egg production was recorded in the middle (April) and at the beginning (March) of the reproductive season (2155 ± 925 vs. 1279 ± 298 eggs per stripping). The highest and the lowest sperm production was observed at the beginning (March) and at the end (May) of the reproductive season (7.9 ± 0.08 × 109 vs. 1.9 ± 0.06 × 109 per stripping).

Heart lipomatosis in domestic animals: a reviewReview

C.F. Agudelo, P. Schanilec

Vet Med - Czech, 2013, 58(5):252-259 | DOI: 10.17221/6806-VETMED

Heart lipomatosis represents a group of diseases leading to fatty tissue changes and their accumulation in the heart. Though the morbidity is relatively low, fatty changes are believed to take part in many processes that can cause death, and in fact fatty tissue is a normal component in healthy human and animal hearts. Several diseases that produce fatty changes in human hearts may possibly cause the same syndromes in animals but many of these conditions remain undiscovered. The aim of this paper is to review the typical conditions leading to fatty changes in human hearts and to delineate their relationship with animal pathologies.

Echocardiographic assessment of right heart indices in dogs with elevated pulmonary artery pressure associated with chronic respiratory disorders, heartworm disease, and chronic degenerative mitral valvular diseaseOriginal Paper

T.C. Tai, H.P. Huang

Vet Med - Czech, 2013, 58(12):613-620 | DOI: 10.17221/7180-VETMED

The aim of this study was to evaluate right ventricular (RV) remodeling and right heart failure associated with different causes of elevated pulmonary arterial pressure (PAP) in dogs. In total, 169 client-owned dogs with tricuspid regurgitation (TR) and 40 client-owned clinically healthy dogs were included. Dogs with TR were further categorised as suffering from chronic respiratory disorders (CRD), heartworm disease (HWD), mild/moderate chronic degenerative mitral valvular disease (CDMD), and severe CDMD. Among the echocardiographic indices of the right heart, no significant difference in the tricuspid annular plane systolic excursion to aortic root diameter ratio was found among the clinical healthy controls and the four different TR categories. No significant differences in TR peak velocity and pulmonic regurgitation peak velocity were found among dogs in the four different TR categories. The ratio of the right to left ventricular basal diameter in the right ventricular-focused view was significantly higher in dogs with chronic respiratory disorders and dogs with heartworms. Left ventricular compression quantified using the eccentricity index and the ratio of the main pulmonary artery to aortic root diameter were significantly higher in dogs with HWD. Their right ventricular acceleration to ejection time (AT/ET) was significantly lower in dogs with HWD. Based on these findings, we conclude that right heart indices are affected by CRD, HWD, and moderate to severe CDMD. However, right heart indices derived from left heart measurements might be underestimated in dogs with CDMD.

Felling and skidding damage to residual trees following selection cutting in Caspian forests of IranOriginal Paper

F. Tavankar, B. Majnounian, A.E. Bonyad

J. For. Sci., 2013, 59(5):196-203 | DOI: 10.17221/53/2012-JFS

The felling and skidding damage to residual trees was investigated in a selectively cutting operation in the Caspian forest of Iran. The logging operation was performed by chainsaw and cable skidder. Prelogging, after felling and skidding operations residual tree injuries (species, DBH and damage) were inventoried by systematic plot sampling. Two types of tree damage were observed: destroyed and injured. In this study felling operations mainly injured trees whereas skidding was the main cause of destruction. The percentage of destroyed and injured residual trees by felling operations was 1.4% and 3.4%, whereas the percentage of destroyed and injured residual trees by skid­ding operations was 5.2% and 11.1%. About 87% of destroyed trees were found in the DBH class smaller than 22.5 cm. Maple and Alder were the most damaged trees among the other trees species. Damage to the lower bole and wood damaged intensity were the most common type of injury. To reduce the stand damage, skid trails should be planned before felling and felling directions should be predetermined. In the selection cutting management, limiting logging damage to residual trees must therefore remain a major objective.

Comparison of the phenolic content and total antioxidant activity in wines as determined by spectrophotometric methods

Pavel STRATIL, Vlastimil KUBÁŇ, Jitka FOJTOVÁ

Czech J. Food Sci., 2008, 26(4):242-253 | DOI: 10.17221/1119-CJFS

Folin-Ciocalteu reagent (FCM) and Price and Butler method (PBM) were used for spectrophotometric determination of the total content of phenolic compounds in 29 wines (8 white, 21 red). The average contents of phenolic compounds determined by FCM and PBM were 108 (90-119) and 105 (90-129) for white wines, and 1545 (874-2262) and 547 (306-816) mg/l of gallic acid equivalents (GAE) for red wines, respectively. The reason for the lower PBM values in red wines is the higher reactivity in PBM of phenolic compounds, especially of gallic acid generally used as a standard in the above methods. The higher reactivity of the standard means that the measured absorbance of the sample responds to a lower concentration. The average total antioxidant activities determined by TEAC (Trolox Equivalent Antioxidant Capacity), FRAP (Ferric Reducing Antioxidant Power), and DPPH (using diphenyl-p-picrylhydrazyl radical) were 5.14 (4.30-6.14), 1.43 (0.86-2.14), and 0.71 (0.61-0.81) of Trolox equivalents (TE) and 26.44 (13. 9-34.4), 9.43 (4.92-13.9), and 5.52 (2.91-8.62) mmol/l TE for white and red wines, respectively. Almost the same molar absorptivities with TEAC and DPPH methods were found while with FRAP method it was somewhat higher (about 1.56-times). The ratio of the values determined by FRAP and DPPH methods for white and red wines were 2.0 and 1.7, respectively. The TEAC values were 2.8- and 4.8-fold higher than those determined by FRAP and DPPH methods, respectively. The radical ABTS*+ used in TEAC method is therefore the most reactive and responds to the highest number of hydroxyl groups of the phenolic compounds of wines.

Potassium leaching following silage maize on a productive sandy soil

M. Kayser, M. Benke, J. Isselstein

Plant Soil Environ., 2012, 58(12):545-550 | DOI: 10.17221/523/2012-PSE

Relatively little is known about potassium leaching losses following harvest of silage maize. While direct negative impacts on the environment are unlikely, losses of K with leaching need to be known for accurate balancing, especially on coarse textured soils, where K can be a critical element. In a four-year field experiment the effects of fertilizer forms (inorganic, cattle slurry and pig slurry) and four levels of N input (0, 80, 160, 240 kg N/ha) with corresponding amounts of K on the nutrient balances and leaching of K from silage maize grown on a sandy soil were investigated using suction cups. After four years, surplus of K from cattle slurry led to higher lactate-soluble K in the topsoil. Potassium leaching differed between years with different amounts of rainfall during winter. Annual leaching losses of K increased with N and K input and amounted to 38 kg K/ha, while fertilizer form had no significant effect. Losses of K increased with increasing N leaching (R2 = 0.69). We conclude that in maize production on coarse textured soils and under conditions of high N leaching (86-152 kg N/ha), K leaching can be large (6-84 kg K/ha) and constitutes a relevant part of K balances (-84 to +127 kg K/ha).

Effect of long-term fertilizer application on yield and concentrations of elements (N, P, K, Ca, Mg, As, Cd, Cu, Cr, Fe, Mn, Ni, Pb, Zn) in grain of spring barleyOriginal Paper

M. Hejcman, M. Berková, E. Kunzová

Plant Soil Environ., 2013, 59(7):329-334 | DOI: 10.17221/159/2013-PSE

Little attention has been paid to the effect of long-term fertilizer application on concentrations of elements in grain of barley produced on the metal non-contaminated agricultural soil. In 2010, we analyzed yield and concentrations of elements in grain of spring barley in unfertilized control, mineral fertilizer application (N4P2K2 - 70, 60 and100 kg N, P and K per ha) and combinations of farmyard manure or poultry litter with mineral fertilizer (FMN4P2K2 and PLN4P2K2) treatments in the Ruzyně Fertilizer Experiment established on Luvisol in 1955 in Prague (Czech Republic). The yield of grain ranged from 4.03 to 9.74 t/ha in the control and FMN4P2K2 treatment. There was a positive effect of fertilizer application on concentrations of nitrogen, phosphorusand potassium, but no effect on concentrations of calcium and magnesium. With the exception of iron, concentrations of micro (copper and zinc) and risk elements (arsenic, cadmium, chromium, lead, manganese and nickel) were not significantly affected by the fertilizer treatments. Long-term use of organic and mineral fertilizers with appropriate application rates does not represent any risk for contamination of barley grain by risk elements on mineral rich and metal non-contaminated agricultural soils.

Effects of Beauveria bassiana and acephate on enzyme activities and microbial diversity in paddy soilOriginal Paper

W. Du, J. Zhou, P. Jiang, T. Yang, Y.Q. Bu, C.H. Liu, C.C. Dai

Plant Soil Environ., 2013, 59(12):562-567 | DOI: 10.17221/447/2013-PSE

To investigate the ecological safety of Beauveria bassiana in soil, we evaluated the effects of different concentrations of B. bassiana spores suspensions and acephate on paddy soil microbial flora and enzyme activities in a potted trial. Results showed that B. bassiana can increase the quantity of bacteria and fungi on day 10 and 30, while it showed inhibition on actinomycetes growth on day 10. However, acephate reduced the quantity of bacteria, fungi, and actinomycetes in soil. Investigation of enzyme activities revealed that invertase activity declined during prophase, while urease activity decreased later in B. bassiana treatment groups, and there were no significant changes in alkaline phosphatase or dehydrogenase activity. Acephate showed higher inhibition rates of enzymes. B. bassiana treatment at lower concentrations showed a higher yield. Overall, compared with the acephate, B. bassiana is an effective, environmentally friendly microbial pesticide in this system.

Performance and behaviour at milking after relocation and housing change of dairy cowsOriginal Paper

J. Brouček, M. Uhrinčať, V. Tančin, A. Hanus, P. Tongeľ, Ľ. Botto, I. Bôžik

Czech J. Anim. Sci., 2013, 58(9):389-395 | DOI: 10.17221/6938-CJAS

The hypothesis that relocation of cows with a housing change temporarily decreases their milk production and affects cows' behaviour in the milking parlour has been proved. Forty-one Holstein cows on the 1st and 2nd lactation were relocated from the tie-stall barn into the free-stall barn. Cows were milked in a 2 × 5 herringbone parlour twice a day. Individual milk yields, order, and used parlour side were recorded electronically during 50 (milk) or 22 (order and side) milking sessions. Milk yield after cows' relocation (23.76 kg) significantly decreased if compared to that reached on the day preceding relocation (30.97 kg; P < 0.001). Milk production approached the level of the last day on days 3 and 4 (30.72 and 30.72 kg, respectively) after relocation. Milk yield exceeded that before relocation on day 13 (31.82 kg). There were significant differences between parities during the whole observation period except for the first day after relocation - cows on the 2nd parity yielded more (P < 0.001). Multiparous cows entered the parlour earlier than primiparous, equally during morning and evening milkings (P < 0.01). Generally a left-side preference was found in the observed cows, while it was more prominent in primiparous than in multiparous cows during evening milkings (P < 0.05). Relationships between milking order and milk performance were on days 5-11 negative and significant (P < 0.01). We may conclude that although temporarily, relocation with housing and milking changes significantly affected the milk yield.

Hydrocephalus in dogs: a reviewReview

P. Przyborowska, Z. Adamiak, M. Jaskolska, Y. Zhalniarovich

Vet Med - Czech, 2013, 58(2):73-80 | DOI: 10.17221/6698-VETMED

Hydrocephalus is a multifactoral disorder that was rarely diagnosed in dogs until the availability of advanced imaging techniques in veterinary practice. This article reviews recent advances in the understanding of canine hydrocephalus including pathogenesis, clinical symptoms, diagnostic methods, and treatment solutions. The advantages and disadvantages of USG, RTG, CT and MRI as advanced diagnostic methods are discussed. For now Low-field Magnetic Resonance Imaging is the most useful tool in investigating hydrocephalus. The recommended sequences for MRI are T1-weighting images Spin echo, Field echo 3D with TR 380-750 ms, TE 12-25 ms, slice thickness 1-6 mm and with an interslice gap of 0-2 mm. The evaluation of cerebral ventricular system morphology in obtained MRI scans involves measuring the height, area and volume of the brain and lateral ventricles. The results are classified as normal state if the ratio of ventricular height to the brain height is above 14%, the ratio of ventricular area to the brain area amounts to above 7%, and the ventricular to brain volume ratio is above 5%. However, there are still problems relating to inter- and intrabreed comparison among examined dogs. Treatment solutions in hydrocephalus are also discussed in this review. The medical treatment of hydrocephalus aims to decrease CSF production and is based on using acetazolamide, furosemide and prednisone. Surgical management aims to place the ventriculoperitoneal shunt for CSF flow control. Postsurgical complications are also described in this review.

Comparison of techniques for DNA extraction and agarose gel staining of DNA fragments using samples of CryptosporidiumOriginal Paper

M.C.M. Couto, A.P. Sudre, M.F. Lima, T.C.B. Bomfim

Vet Med - Czech, 2013, 58(10):535-542 | DOI: 10.17221/7085-VETMED

Differentiating between the Cryptosporidium species and their subtypes using only microscopy is impossible. Therefore, molecular tools are indispensable for accurate species and subtype diagnosis. However, if these tools are to be used correctly and accurately, the techniques used must be standardised. In the present study, two molecular techniques for diagnosing Cryptosporidium infection in cows were compared to determine the optimal methods. For each technique, we tested two DNA extraction methods, several annealing temperatures for nested PCR reactions targeting the 18S, SSU rRNA (small subunit ribosomal RNA), and the GP60 (60 kDa glycoprotein) genes, and two types of DNA staining reagents, ethidium bromide and GelRedTM. We determined that one of the tested protocols yields a higher purity of extracted DNA. Additionally, optimised temperatures for the nested PCR of the 18S and GP60 genes were established. Finally, we determined that the GelRedTM dye was more sensitive than ethidium bromide, and its low toxicity facilitates handling and disposal and reduces environmental contamination.

Study of briquette properties at their long-time storageOriginal Paper

M. Brožek

J. For. Sci., 2013, 59(3):101-106 | DOI: 10.17221/27/2012-JFS

The paper presents the results of laboratory tests aimed at the study of storage place, storage manner and storage time in relation to mechanical properties of briquettes made from spruce shavings. A BrikStar 50 briquetting press with a pressure chamber 65 mm in diameter of the Briklis firm was used for the briquette production. All briquettes were made at the constant adjustment of all parameters of the briquetting press. The briquette properties were evaluated by determination of their density and rupture force. Moreover, mechanical durability, gross calorific value, total mois­ture and ash content were determined. It follows from the results of tests that at briquette storage in a well closed plastic bag neither place nor storage time influenced significantly their life time. At briquette storage in a net plastic bag various intensive damage to briquettes occurred, mainly depending on their storage place and storage time.

Incidence of lettuce downy mildew (Bremia lactucae) and powdery mildew (Golovinomyces cichoracearum) in natural populations of prickly lettuce (Lactuca serriola)Original Paper

Barbora MIESLEROVÁ, Aleš LEBEDA, Irena PETRŽELOVÁ, Pavla KORBELOVÁ

Plant Protect. Sci., 2013, 49(10):S24-S32 | DOI: 10.17221/51/2013-PPS

The study was focused on the wild pathosystem Lactuca serriola-lettuce downy mildew (Bremia lactucae) and lettuce powdery mildew (Golovinomyces cichoracearum). Observations were focused mainly on recording natural infection of prickly lettuce (Lactuca serriola) by downy and powdery mildews in the East Bohemia and Moravia (the Czech Republic) in the May-September period of 2007-2011, and on the influence of environmental conditions on disease incidence. Only data for July and August were used for the detailed comparisons of occurrence of both pathogens, because intensity of disease in this period was the highest. Data were linked with the average monthly temperature and rainfall rate in the Czech Republic. G. cichoracearum prefers rather low levels of precipitation and temperatures around 20°C, therefore significantly higher incidence of this pathogen was recorded in August 2007. On the other hand in July 2009 and 2010, when the intensities of precipitation were higher, incidence of Bremia lactucae prevailed. In August 2010 and 2011 incidence of both pathogens were more or less similar at all locations. Our observations showed that climatic conditions influence the incidence and prevalence of both pathogens in weedy growing populations of Lactuca serriola.

Effect of lean meat proportion on the chemical composition of pork

Monika Okrouhlá, Roman Stupka, Jaroslav Čítek, Michal Šprysl, Milan Trnka, Eva Kluzáková

Czech J. Food Sci., 2008, 26(6):464-469 | DOI: 10.17221/18/2008-CJFS

The objective of this work was to verify the effect of the lean meat proportion on the chemical composition of the meaty parts (loin and ham) of pork. A total of 116 finishing hybrid pigs commonly used in the Czech Republic were fattened for this purpose. The pigs were divided according to the lean meat proportion criterion into 3 groups, i.e. more than 60.0%, 55.0-59.9% and 50.0-54.9%. Representative muscle samples were taken from the right halves of these pigs. They were then homogenised and submitted to chemical analysis. The results of the measuring showed that the values of the water content, intramuscular fat (IMF), crude proteins, and ash matter ranged in the loin between 72.50-72.80%, 1.56-1.96%, 23.20-23.40%, and 1.37-1.40%, respectively, and in the ham between of 70.43-71.59%, 3.52-4.26%, 21.67-21.95%, and 1.42-1.56%, respectively. The ascertained values of the water content and crude proteins with regard to the increasing lean meat proportion in the carcasses did not show any developmental tendencies. As for the content of IMF, it was determined that the higher was the lean meat proportion, the lower was the IMF content. Concerned of sensoric quality traits it means that pork meat from supermeaty hybrid pigs shows lower quality. Concerning the content of ash matter, it was observed that the ash content increased with an increasing lean meat proportion. In the carcass part of the musculus longissimus lumborum et thoracis (MLLT), it was demonstrated that the higher was the lean meat proportion, the lower was the content of amino acids - threonine, isoleucine, lysine, aspartic acid, serine, and proline. From point of the production of exceedingly meaty pigs (over 60%), it can be expected a worse nutritional pork meat value. In the carcass portion of the musculus semimembranosus (MS), the contents of valine, isoleucine, phenylalanine, lysine, serine, proline, and glycine increased with an increasing lean meat proportion. Within the framework of statistical evaluation of differences between the groups, the values of IMF ((P ≤ 0.01) in MLLT, water content, IMF, ash matter, threonine, valine, phenylalanine, lysine, aspartic acid, serine, glycine, and alanine in MS were highly significant ((P ≤ 0.05; (P ≤ 0.01 and (P ≤ 0.001).

Accumulation of copper and zinc in soil and plant within ten-year application of different pig manure ratesOriginal Paper

Y. Xu, W. Yu, Q. Ma, H. Zhou

Plant Soil Environ., 2013, 59(11):492-499 | DOI: 10.17221/121/2013-PSE

Fertilization of crops with pig manure is a common practice throughout the world. Nevertheless, due to the relatively high copper (Cu) and zinc (Zn) contents in pig manure, continuous application of pig manure could have negative effects on soil and plant. The study aimed at the impacts of long-term applying different pig manure rates (equivalently 0, 100, 250 and 500 kg total N/ha/year from 2002 to 2008 and 0, 10, 25 and 50 t fresh weight/ha/year from 2009 to 2011, respectively) on Cu and Zn accumulation in soil and plant. During the 10 years of the experiment, a total of 2.04 to 10.20 kg/ha/year for Cu, 3.15 to 15.73 kg/ha/year for Zn were applied to the soil. Results from this study showed that long-term pig manure application resulted in serious accumulation of Cu and Zn in soil, total Cu and Zn concentrations increased by 204% and 107% at high application rates, respectively. Although topsoil Cu and Zn concentrations were below concentrations considered phytotoxic to crops, according to current Chinese legislation, it would take only less time than 16 and 27 years of high application rates to reach the allowable limits. Our result also suggested that Cu and Zn leaching occurred in the tested soil. The Cu and Zn concentrations in stalks and grains were not affected by the application of pig manure, and these values were lower than the threshold values for animal and human ingestion.

Effect of dose of thymol and supplemental flavours or camphor on palatability in a choice feedings study with piglets

J. Michiels, J. Missotten, A. Ovyn, N. Dierick, D. Fremaut, S. De Smet

Czech J. Anim. Sci., 2012, 57(2):65-74 | DOI: 10.17221/5133-CJAS

Thymol's antimicrobial properties urged researchers to study its effect on animal performance and intestinal health in pigs. However, thymol has the characteristic sharp odor of thyme and a bitter, aromatic, and sometimes burning sensation which may elicit feeding aversions. The objectives in the current study were: (1) to determine the effect of dose of thymol and camphor on palatability and (2) to test the hypothesis that supplemental flavours or camphor, the latter as a known Transient Receptor Potential A1 blocker, could mitigate feed avoidance caused by thymol. Two analogous choice-feeding trials were conducted. Feed intake of the test diet was expressed as proportion of the total intake and tested by means of a one-sample Student's t-test against a set value of 50%. The preference for feed supplemented with 125, 500, 1250 and 2000 mg/kg thymol was 53.7 ± 6.0% (P > 0.05), 47.5 ± 5.1% (P > 0.05), 36.8 ± 4.9% (P = 0.022), and 3.9 ± 7.9% (P = 0.005) respectively. When feed containing 2000 mg/kg thymol with either flavour A (containing intense sweeteners) or flavour B (containing the same intense sweeteners and a caramel aroma) was opposed against a control diet, the relative intake of the test diets was 19.9 ± 5.8% and 14.0 ± 4.9% (both P < 0.05) respectively. When animals were offered one of these test diets and a reference diet with 2000 mg/kg thymol, animals exhibited a preference for the feed with 2000 mg/kg thymol + flavour A, but not for the feed with 2000 mg/kg thymol + flavour B. Thus, supplemental flavours containing intense sweeteners partially overcame feed avoidance caused by thymol which was less pronounced when the caramel aroma was present. Exposure to camphor (50 and 200 mg/kg) did not improve feed preference for a diet containing 1250 mg/kg thymol. Thymol's bitter taste might be largely responsible for the recorded feed refusal at high inclusion rates.

Effect of maternal undernutrition during late pregnancy on hormonal status and metabolic changes in neonatal lambsOriginal Paper

F. Gao, Y.C. Liu, X.Z. Hou

Czech J. Anim. Sci., 2013, 58(1):15-20 | DOI: 10.17221/6521-CJAS

The study investigated the consequences of maternal undernutrition during late pregnancy on hormonal status and metabolic changes in neonatal lambs. Four ewes out of twenty-eight multiparous ewes mated at a synchronized oestrus were slaughtered at day 90 of pregnancy to collect fetal blood to serve as an initial comparison group. Twenty-four animals were divided into three groups and offered 0.18 MJ ME.kg-0.75per day (restricted group 1, RG1), 0.33 MJ ME.kg-0.75per day (restricted group 2, RG2), and control group (ad libitum CG) during late pregnancy, respectively. Immediately after parturition, blood was collected from the neonatal lambs in each group and analyzed for growth hormone (GH), insulin-like growth factor I (IGF-I), IGF-II, insulin (INS), thyroxine (T4), triiodothyronine (T3), glucose (GLU), nonesterified fatty acids (NEFA), and total amino acid (TAA), respectively. The results indicated that the maternal undernutrition during late gestation decreased the average lamb birth weight in both RG1 (P < 0.01) and RG2 (P < 0.05) compared to CG. During the late fetal development period, the concentrations of T4, INS, and IGF-I of neonatal lambs in CG were increased (P < 0.05) compared to those at day 90 of pregnancy; the secretions of T4, INS, and IGF-I in RG1 and RG2 during restriction were suppressed. The neonatal INS concentrations in RG1 and RG2 were decreased (P < 0.05), but the neonatal GH concentration in RG1 was greater than that of CG (P < 0.05). The GLU concentrations of neonatal lambs in RG1 were lower than those of CG (P < 0.05). However, the neonatal NEFA (P < 0.05) and TAA (P < 0.01) concentrations in RG1 were greater than those of CG. Thus, maternal undernutrition can change the hormonal and metabolic status of neonatal lambs, which may have significant implications on postnatal growth and adult health.

Contagious caprine pleuropneumonia and its current picture in Pakistan: a reviewReview

S. Samiullah

Vet Med - Czech, 2013, 58(8):389-398 | DOI: 10.17221/6977-VETMED

Contagious caprine pleuropneumonia (CCPP) is caused by Mycoplasma capricolum subsp. capripneumoniae (Mccp) which belongs to the Mycoplasma mycoides cluster, a group of five closely related Mycoplasmas, pathogenic to ruminants. The true lesions of CCPP are restricted to the alveolar tissues of infected goats, which distinguish it from other respiratory diseases of small ruminants caused by members of the Mycoplasma mycoides cluster. The typical signs of CCPP are an accumulation of pleural fluid, unilateral hepatisation, adhesions, pleurisy and pleuropneumonia which clearly differentiate it from "MAKePS" syndrome caused by Mycoplasma mycoides subsp. capri (Mmc). The available literature on CCPP shows that so far in Pakistan, the true causative agent (Mccp) of this disease has only been isolated in the Pashin District of Balochistan and that the disease is more frequently confused with other respiratory diseases of goat caused by the Mycoplasma mycoides cluster. The lack of suitable techniques and extensive knowledge in the field is a big limitation for the isolation and characterisation of Mccp from prevailing CCPP-like cases in the goat population of Pakistan.

Free European data on forest distribution: overview and evaluationOriginal Paper

J. Trombik, T. Hlásny

J. For. Sci., 2013, 59(11):447-457 | DOI: 10.17221/58/2013-JFS

A growing need for the evaluation of prospects and sustainability of forest resources calls for the availability of harmonized data on forest distribution. We described and evaluated nine datasets providing such information: Corine LandCover, four European forest maps and four tree species distribution maps. Apart from providing a condensed overview of these datasets, we focused on the match between selected forest maps and forest management plans (FMPs) of Slovakia, which can be thought of as highly accurate information on forest distribution. The degree of match between forest and species area, within 306 forest administrative districts of Slovakia, was used as an indicator of accuracy. In addition, the match between the total forest and species area in Slovakia, given by FMPs and by evaluated datasets, was addressed. We found a high degree of match for the datasets on forest distribution (R-square 0.77-0.93, depending on the dataset), as well as strong agreement in total forest area (± 5%). Both indicators are worse in the case of forest type evaluation (coniferous and broadleaved). Poor results were obtained for tree species maps, which under- or overestimated species areas by tens of per cent, although differences were highly variable among species. The obtained results are valid mainly for temperate forests.

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