Effects of application rates of poly-γ-glutamic acid on vegetable growth and soil bacterial community structure

被引：30

作者：

Bai, Naling ^{[1
,2
]}

Zhang, Hanlin ^{[1
,2
]}

Li, Shuangxi ^{[1
]}

Zheng, Xianqing ^{[1
,2
]}

Zhang, Juanqin ^{[1
]}

Sun, Lina ^{[1
,2
]}

Lv, Weiguang ^{[1
,2
,3
]}

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

来源：

APPLIED SOIL ECOLOGY | 2020年 / 147卷

关键词：

Fertilizer reduction; gamma-PGA application; Apparent fertilizer utilization efficiency; Bacterial community structure; High-throughput sequencing; NITROGEN USE EFFICIENCY; BACILLUS-SUBTILIS; POLY(GAMMA-GLUTAMIC ACID); MICROBIAL COMMUNITY; POLYGLUTAMIC ACID; PURIFICATION; DIVERSITY; AMYLOLIQUEFACIENS; SEEDLINGS; IMPROVES;

D O I：

10.1016/j.apsoil.2019.103405

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

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.

引用

页数：8

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