Template-Type: ReDIF-Article 1.0 Author-Name: Byeonggil Choi Author-Workplace-Name: Department of Forest Convergence Science, Gyeongsang National University, Jinju, South Korea Author-Name: Gyeongwon Baek Author-Workplace-Name: Department of Forest Convergence Science, Gyeongsang National University, Jinju, South Korea Author-Name: Hyungsub Kim Author-Workplace-Name: Division of Environmental Science and Ecological Engineering, Korea University, Seoul, South Korea Author-Name: Yowhan Son Author-Workplace-Name: Division of Environmental Science and Ecological Engineering, Korea University, Seoul, South Korea Author-Name: Choonsig Kim Author-Workplace-Name: Department of Forest Convergence Science, Gyeongsang National University, Jinju, South Korea Title: Comparisons of carbon and nitrogen dynamics of litterfall components in adjacent Pinus densiflora and Quercus variabilis stands Abstract: This study aimed to determine the effects of the stand and month on the carbon (C) and nitrogen (N) concentrations and the inputs of the litterfall components in adjacent Pinus densiflora and Quercus variabilis stands. The monthly C concentrations of the litterfall components were significantly higher in the P. densiflora stand than in the Q. variabilis stand, whereas the monthly N concentrations of the leaf and miscellaneous litter were higher in the Q. variabilis stand than in the P. densiflora stand. The coefficient variations of the N concentrations were higher than those of C concentrations of the litterfall components. The monthly C and N inputs of the leaf litter showed a unimodal pattern in the Q. variabilis stand, whereas multimodal patterns in the P. densiflora stand could be seen. The annual total C inputs were not significantly different between the P. densiflora [2 691 kg(C).ha-1.yr-1] and Q. variabilis [2 439 kg(C).ha-1.yr-1] stands. However, the annual total N inputs were significantly higher in the Q. variabilis [44.5 kg(N).ha-1.yr-1] stand than in the P. densiflora [38.6 kg(N).ha-1.yr-1] stand. These results indicate that the C and N dynamics in the litterfall components were affected by the species and sampling months in adjacent P. densiflora and Q. variabilis stands. Keywords: carbon, Korean red pine, litterfall components, nitrogen, oriental cork oak Journal: Journal of Forest Science Pages: 287-297 Volume: 68 Issue: 8 Year: 2022 DOI: 10.17221/75/2022-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/75/2022-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202208-0001.txt Handle: RePEc:caa:jnljfs:v:68:y:2022:i:8:id:75-2022-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Vasyl Lavnyy Author-Workplace-Name: Faculty of Forestry and Park Gardening, Ukrainian National Forestry University, Lviv, Ukraine Author-Name: Peter Spathelf Author-Workplace-Name: Faculty of Forest and Environment, Eberswalde University for Sustainable Development, Eberswalde, Germany Author-Name: Rostyslav Kravchuk Author-Workplace-Name: Botanical Garden, Ukrainian National Forestry University, Lviv, Ukraine Author-Name: Ruslan Vytseha Author-Workplace-Name: Faculty of Forestry and Park Gardening, Ukrainian National Forestry University, Lviv, Ukraine Author-Name: Volodymyr Yakhnytskyy Author-Workplace-Name: Stradch Forestry Training Enterprise, Ukrainian National Forestry University, Ivano-Frankove, Ukraine Title: Silvicultural options to promote natural regeneration of Scots pine (Pinus sylvestris L.) in Western Ukrainian forests Abstract: Scots pine (Pinus sylvestris L.) forests belong to the most relevant forest types in the Western Ukrainian Roztochia area. The promotion of close-to-nature forest management in Ukraine in the framework of the forest strategy 2 035 supports natural regeneration and the application of diverse felling methods beyond clearcutting. In the present study, natural regeneration was analysed in mixed Scots pine stands on poor and relatively rich soils, after small clearcuts, shelterwood cutting and gap fellings (with or without soil preparation), with respect to tree species composition, species abundance and height growth. It could be shown that Scots pine is the most abundant species in all the felling systems, with on average more than 100 000 plants per ha on poor soils. Other admixed tree species only occur with small shares. Natural regeneration, especially of Scots pine, was less abundant on rich soils and in shelterwood, compared to a small clearcut. After the young plants have established, their abundance declined in the second and third year due to competing herbaceous plants and thick litter. Keywords: abundance, admixed species, felling schemes, rejuvenation, seedling density, silviculture Journal: Journal of Forest Science Pages: 298-310 Volume: 68 Issue: 8 Year: 2022 DOI: 10.17221/73/2022-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/73/2022-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202208-0002.txt Handle: RePEc:caa:jnljfs:v:68:y:2022:i:8:id:73-2022-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Luis Alberto Marín-Martínez Author-Workplace-Name: Instituto de Biotecnología y Ecología Aplicada (INBIOTECA), Universidad Veracruzana, Xalapa, Veracruz, Mexico Author-Name: Lourdes Georgina Iglesias-Andreu Title: Effect of LED lights on the in vitro growth of Pinus pseudostrobus Lindl., plants Abstract: Pinus pseudostrobus Lindl. is a species endemic to Mexico and is widely used in reforestation programmes, as it is highly adapted to poor, shallow, limestone soils and has high commercial importance. However, it is necessary to preserve this genetic material since it is in trouble due to high rates of deforestation, land use change, and forest fires, so it is necessary to have effective strategies to obtain good quality seedlings. Due to the properties of LED (light emitting diode) lamps used for illumination in the production of in vitro plants, the effects of two different lighting systems (LED and fluorescent) on an in vitro culture were analysed for the morphological characteristics of the growth and photosynthetic pigment content in P. pseudostrobus seedlings. The length and root size of the seedlings were affected by the type of illumination, where a red LED light was the most effective at 30 days of evaluation. However, a blue LED light was equally effective as a red LED light at 60 days of seedling development. On the other hand, the fluorescent light was better in terms of the number of needles in the first stage, but we found the blue LED light to be better in the second stage. For the photosynthetic pigment content, the highest values were found with the blue LED light. The results showed that the LED lighting system favours the growth, development, and photosynthetic pigment content of the species under study. Keywords: conifers, in vitro culture, light-emitting diodes (LEDs), plant tissue culture, seedlings Journal: Journal of Forest Science Pages: 311-317 Volume: 68 Issue: 8 Year: 2022 DOI: 10.17221/43/2022-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/43/2022-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202208-0003.txt Handle: RePEc:caa:jnljfs:v:68:y:2022:i:8:id:43-2022-JFS Template-Type: ReDIF-Article 1.0 Author-Name: Pejman Parhizkar Author-Workplace-Name: Forest Research Division, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran Author-Name: Mohammad Hossein Sadeghzadeh Hallaj Author-Workplace-Name: Forest Research Division, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran Author-Name: Majid Hassani Author-Workplace-Name: Forest Research Division, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran Title: Managed vs. unmanaged Fagus orientalis Lipsky forests: Structure and diversity of natural regeneration in northern Iran Abstract: The predominant natural disturbance regime within an old-growth Oriental beech (Fagus orientalis Lipsky) forest has been imitated in order to continue the forest cover. It is unclear how much the silvicultural characteristics of regeneration in a managed forest differ from those in an unmanaged old-growth forest subject only to natural dynamics. In this study, we compared important quantitative (e.g. height, collar diameter, crown width, length of spring shoot on the main stem and length of the uppermost internodes) and qualitative (e.g. healthy, mode of branching and stem form) silvicultural characteristics of beech saplings within the gaps between an unmanaged old-growth Oriental beech compartment and a managed forest in the northern Iran ten years after a single harvest entry using a single-tree selection. Canopy gaps larger than 100 m2 with visible remnants of gapmakers (i.e. stumps) were included in this study. The saplings' characteristics of both compartments were within typical ranges for an old-growth beech forest. Small, but important differences were also observed. The value of beech saplings' density in the managed compartment (4.9 ± 0.7 SE) was significantly (P < 0.05) higher than the unmanaged one (3.4 ± 0.6 SE). Conversely, the value of the Menhinick Richness index in the unmanaged one (0.96 ± 0.05 SE) was significantly (P < 0.01) higher than the managed compartment (0.80 ± 0.04 SE). The sapling spring shoot length in the unmanaged compartment (13.3 ± 1.7 SE) was also significantly (P < 0.01) higher than the managed one (7.3 ± 0.7 SE). Relying on beech trees in a managed compartment will hamper the stability of future forest stands. The imitation of the old growth forest must be complete. To increase the resistance of the forest stands to adverse conditions, pay attention to the tree species richness at the time of marking. Keywords: close-to-nature, forest gap, plagiotropy, richness, silviculture Journal: Journal of Forest Science Pages: 318-328 Volume: 68 Issue: 8 Year: 2022 DOI: 10.17221/63/2022-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/63/2022-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-202208-0004.txt Handle: RePEc:caa:jnljfs:v:68:y:2022:i:8:id:63-2022-JFS