The effects of ploy (γ-glutamic acid) on spinach productivity and nitrogen use efficiency in North-West China L., Fei L., Mohamed K.S., Liu L., Wang Z., Zhong Y., Dai Z. (2018): The effects of ploy (γ-glutamic acid) on spinach productivity and nitrogen use efficiency in North-West China. Plant Soil Environ., 64: 517-522.
download PDF

Recently, with the problem of low utilization rate of nitrogen fertilizers in farmland, agriculture practices have shifted towards the development of environmentally friendly nitrogen fertilizers. Ploy (γ-glutamic acid) is a new plant growth regulator with characteristics of water and fertilizer conservation. In this study, pot experiments were conducted to investigate the effects of ploy (γ-PGA) on the yield, nitrogen use efficiency and soil aggregate of spinach (Spinacia oleracea L.). The results indicated that γ-PGA (0.1%) increased plant growth (as measured by fresh and dry plant weight). However, increasing γ-PGA significantly decreased spinach quality parameters. The nitrogen utilization and use efficiency were increased with increasing γ-PGA. Ploy was stronger in water coagulation which effectively increased soil porosity and improved soil structure. The results suggest that 0.1% of γ-PGA has positive effects on spinach growth.

Abdelraouf E.A.A. (2016): The effects of nitrogen fertilization on yield and quality of spinach grown in high tunnels. Alexandria Science Exchange Journal, 37: 488–495.
Chu Q., Dong C.J., Shang Q.M. (2016): Effects of γ-poly glutamic acid on substrate mineral nutrient supply and growth of tomato plug seedlings. Journal of Plant Nutrition and Fertilizer, 22: 855–862. (In Chinese)
Chuai J.F., Xioa Y., Zhuang Z.J., Wang L., Xu Z.W. (2016): Study on the fertilizer efficiency of γ-polyglutamic acid urea and its eluviation characteristics. Journal of Anhui Agricultural Sciences, 44: 137–139. (In Chinese)
Delogu G, Cattivelli L, Pecchioni N, De Falcis D, Maggiore T, Stanca A.M (1998): Uptake and agronomic efficiency of nitrogen in winter barley and winter wheat. European Journal of Agronomy, 9, 11-20
FAO Statistical Yearbook (2008): Food and Agriculture Organization of the United Nations. Rome, FAO, Fishery and Aquaculture Statistics Yearbook.
Ho Guan-Huei, Ho Tong-Ing, Hsieh Kuo-Huang, Su Yuan-Chi, Lin Pi-Yao, Yang Jeng, Yang Kun-Hsiang, Yang Shih-Ching (2006): γ-Polyglutamic Acid Produced by Bacillus Subtilis (Natto): Structural Characteristics, Chemical Properties and Biological Functionalities. Journal of the Chinese Chemical Society, 53, 1363-1384
Ivanovics G., Bruckner V. (1937a): Chemical and immunologic studies on the mechanism of anthrax infection and immunity. I. The chemical structure of capsule substance of anthrax bacilli and its identity with that of the B. mesentericus. Zeitschrift fur Immunitats-forschung und Experimentelle Therapie, 90: 304–318.
Ivanovics G., Bruckner V. (1937b): The chemical nature of the immuno-specific capsule substance of anthrax bacillus. Naturwissenschaften, 25: 250.
TISDALL J. M., OADES J. M. (1982): Organic matter and water-stable aggregates in soils. Journal of Soil Science, 33, 141-163
Li Z.Y., Zheng L., Lu L.H., Li L.H. (2014): Improvement in the H2SO4-H2O2 digestion method for determining plant total nitrogen. Chinese Agricultural Science Bulletin, 30: 159–162.
Li Y.S., Hu X.J., Sun T.H., Hou Y.X., Song X.Y., Yang J.S., Chen H.L. (2011): A review of soil washing/flushing of contaminated soil. Chinese Journal of Ecology, 30: 596–602.
Lu X.X., Li X.L., Ma J., Wu S.K., Chen C.Q., Wu W. (2011): Enhanced bioremediation of coking plant soils contaminated with polycyclic aromatic hydrocarbons. Environmental Science, 32: 864–869.
Li J.Y., Hu H.Q., Li R.J., Chen S.W., Zhang S.F. (2009): Modified phosphate rock by γ-poly-glutamic acid and its effects on the growth of rapeseed seedlings and soil properties. Plant Nutrition and Fertilizer Science, 15: 441–446.
López-Bellido Luis, López-Bellido Rafael J., Redondo Ramón (2005): Nitrogen efficiency in wheat under rainfed Mediterranean conditions as affected by split nitrogen application. Field Crops Research, 94, 86-97
Mengel K., Kirkby E.A. (ed.) (1980): Principles of Plant Nutrition. Netherlands, Springer.
Montemurro F., Maiorana M., Ferri D., Convertini G. (2006): Nitrogen indicators, uptake and utilization efficiency in a maize and barley rotation cropped at different levels and sources of N fertilization. Field Crops Research, 99, 114-124
Shih I.-L., Van Y.-T. (2011): The production of poly-(γ-glutamic acid) from microorganisms and its various applications. Bioresource Technology, 79: 207–225.
Wang M., Xu X.R. (2014): Research progress on application of γ-polyglutamic acid in agriculture. Heilongjiang Agricultural Sciences, 10: 161–163.
Xia F., Cai H., Chen S.W. (2008): Effects of poly-γ-glutamic acid on retarding calcium phosphate depositing and its chelation with calcium ion. Food Science, 29: 56–59.
Xu Z.Q., Lei P., Feng X.H., Xu X.J., Xu H., Yang H.B., Tang W.Q. (2013): Effect of poly(γ-glutamic acid) on microbial community and nitrogen pools of soil. Acta Agriculturae Scandinavica, Section B – Soil and Plant Science, 63: 657–668.
Zhai Y.L., Cao X.C., Shuangqing L., Liu W.Y., Zhang L.L. (2013): Effects of poly-γ-glutamic acid strengthened fertilizer on the dry matter accumulation and distribution of cotton. Hubei Agricultural Sciences, 52: 5167–5170.
Zhang C. (2014): The Regulatory Mechanism of Calcium on Glutamate Dehydrogenase in Production of Poly-γ-glutamic acid by Bacillus subtilis natto. Xi’an, Shaanxi Normal University.
Zhu Z.L. (2008): Research on soil nitrogen in China. Acta Pedologica Sinica, 45: 778–783.
Zeng J., Fei L.J., Chen L., Yang Y. (2018): Effects of γ-PGA on soil structure and water-holding characteristics. Journal of Soil and Water Conservation, 32: 217–224.
download PDF

© 2022 Czech Academy of Agricultural Sciences | Prohlášení o přístupnosti