Effect of poly (gamma-glutamic acid) on wheat productivity, nitrogen use efficiency and soil microbes
文献类型: 外文期刊
第一作者: Xu, Z.
作者: Xu, Z.;Wan, Ch.;Feng, X.;Xu, H.;Xu, X.
作者机构:
关键词: Poly (gamma-glutamic acid);fertilizer synergist;N use efficiency;soil microbial biomass nitrogen;soil enzyme
期刊名称:JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION ( 影响因子:3.872; 五年影响因子:3.771 )
ISSN: 0718-9516
年卷期: 2013 年 13 卷 3 期
页码:
收录情况: SCI
摘要: Recently, with numerous environmental problems being caused by chemical fertilizer overuse, agricultural practices are shifting toward the development of environmentally friendly N fertilizers. In this study, pot and field experiments were simultaneously conducted to investigate the effect of poly (gamma-glutamic acid) (gamma-PGA) on the yield, N use efficiency, and soil microenvironment of wheat. Our study demonstrates a statistically significant increase in winter wheat, number of tillers, seed number per spike, yield, soil microbial biomass N (SMBN), and soil enzymes after gamma-PGA application. The highest grain yield of 7435.69 +/- 55.91 kg ha(-1) was obtained after gamma-PGA application in the field experiment, which was 7.17% higher than the urea control. The N recovery efficiency increased by 11.81%-14.00% and 11.30%-11.38% after the application of gamma-PGA in pot and field experiments, respectively. More mineral nitrogen in soil was immobilized by the microbes after gamma-PGA application at the early growth stage of wheat. The immobilized nitrogen was gradually released at the late growth stage. The results demonstrate that gamma-PGA can be used as a fertilizer synergist.
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