Microbial Responses to the Reduction of Chemical Fertilizers in the Rhizosphere Soil of Flue-Cured Tobacco

被引:25
|
作者
Shen, Min-Chong [1 ]
Zhang, Yu-Zhen [2 ]
Bo, Guo-Dong [1 ]
Yang, Bin [3 ]
Wang, Peng [3 ]
Ding, Zhi-Yong [3 ]
Wang, Zhao-Bao [2 ]
Yang, Jian-Ming [2 ]
Zhang, Peng [1 ]
Yuan, Xiao-Long [1 ]
机构
[1] Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao, Peoples R China
[2] Qingdao Agr Univ, Coll Life Sci, Qingdao, Peoples R China
[3] Shandong Qingdao Tobacco Co Ltd, Qingdao, Peoples R China
关键词
reduction of chemical fertilizer; bacterial community; variation of bacterial community; sustainable agriculture; agricultural resource utilization; USE EFFICIENCY; CROP YIELD; COMMUNITY; RICE; SUCCESSION; MANAGEMENT; COMPLEX; PHOSPHATE; DYNAMICS; QUALITY;
D O I
10.3389/fbioe.2021.812316
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The overuse of chemical fertilizers has resulted in the degradation of the physicochemical properties and negative changes in the microbial profiles of agricultural soil. These changes have disequilibrated the balance in agricultural ecology, which has resulted in overloaded land with low fertility and planting obstacles. To protect the agricultural soil from the effects of unsustainable fertilization strategies, experiments of the reduction of nitrogen fertilization at 10, 20, and 30% were implemented. In this study, the bacterial responses to the reduction of nitrogen fertilizer were investigated. The bacterial communities of the fertilizer-reducing treatments (D10F, D20F, and D30F) were different from those of the control group (CK). The alpha diversity was significantly increased in D20F compared to that of the CK. The analysis of beta diversity revealed variation of the bacterial communities between fertilizer-reducing treatments and CK, when the clusters of D10F, D20F, and D30F were separated. Chemical fertilizers played dominant roles in changing the bacterial community of D20F. Meanwhile, pH, soil organic matter, and six enzymes (soil sucrase, catalase, polyphenol oxidase, urease, acid phosphatase, and nitrite reductase) were responsible for the variation of the bacterial communities in fertilizer-reducing treatments. Moreover, four of the top 20 genera (unidentified JG30-KF-AS9, JG30-KF-CM45, Streptomyces, and Elsterales) were considered as key bacteria, which contributed to the variation of bacterial communities between fertilizer-reducing treatments and CK. These findings provide a theoretical basis for a fertilizer-reducing strategy in sustainable agriculture, and potentially contribute to the utilization of agricultural resources through screening plant beneficial bacteria from native low-fertility soil.
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页数:12
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