Effects of application rates of poly-gamma-glutamic acid on vegetable growth and soil bacterial community structure
文献类型： 外文期刊
作者： Bai, Naling 1 ; Zhang, Hanlin 1 ; Li, Shuangxi 1 ; Zheng, Xianqing 1 ; Zhang, Juanqin 1 ; Sun, Lina 1 ; Lv, Weiguang 1 ;
作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Res Inst, Shanghai 201403, Peoples R China
2.Shanghai Key Lab Protected Hort Technol, Shanghai 201403, Peoples R China
3.Minist Agr, Agr Environm & Farmland Conservat Expt Stn, Shanghai 201403, Peoples R China
关键词： Fertilizer reduction; gamma-PGA application; Apparent fertilizer utilization efficiency; Bacterial community structure; High-throughput sequencing
期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）
ISSN： 0929-1393
年卷期： 2020 年 147 卷
页码：
收录情况： SCI
摘要： In this study, we investigated the effect of high-molecular-weight gamma-PGA (over 4000 kDa) produced by Bacillus sp. A-5 on Chinese cabbage (Brassica rapa L. ssp. chinensis L.) productivity, apparent fertilizer utilization efficiencies, and soil bacterial community structure. Compared to CF treatment, gamma-PGA application at low rates (PO and P1) decreased vegetable yield by 14.29% and 17.30%, respectively; however, P2, P3, and F2 (moderate and high doses of gamma-PGA application) offset the chemical fertilizer reduction and thereby increased the apparent utilization efficiencies by 27.82-52.27% for N, 17.05-64.59% for P, and 32.73-41.43% for K. With reduced fertilizer application, the P2, P3, and F2 treatments increased soil bacterial community diversity, richness, and evenness; in contrast, the PO and P1 treatments decreased these variables. In conclusion, gamma-PGA can enhance the apparent fertilizer utilization efficiencies and increase the relative abundances of potential plant-growth-promoting bacteria in soil in a concentration-dependent manner, thereby improving Chinese cabbage yield.
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