›› 2020, Vol. 32 ›› Issue (2): 308-316.DOI: 10.3969/j.issn.1004-1524.2020.02.15

• Environmental Science • Previous Articles     Next Articles

Effects of nitrogen management on soil microbial community structure in paddy fields

LI Meilin1,2, CHEN Yutiao3, HONG Xiaofu2, QIAO Yuying2,4, WANG Qingxia2, CHEN Xijing2, SHEN Alin2, YU Man2,*   

  1. 1. College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300,China;
    2. Institute of Environment, Resource, Soil and Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
    3. Institute of Crops and Utilization of Nuclear Technology, Zhejiang Academy of Agricutural Sciences, Hangzhou 310021, China;
    4. College of Resources and Environment, Northwest A&F University, Yangling 712100, China
  • Received:2019-08-30 Online:2020-02-25 Published:2020-03-13

Abstract: The microbial communities in four nitrogen fertilizer management modes, namely, zero-nitrogen treatment (CK), farmers’ conventional cultivation pattern (FP), modified farmers’ conventional cultivation pattern 1 (OPT1), and modified farmers’ conventional cultivation pattern 2 (OPT2), were studied by phospholipid fatty acid (PLFA) and Biolog-Eco methods to provide references for the rational utilization of nitrogen fertilizer in paddy fields. It was shown that the microbial metabolic activity and carbon source utilization ability increased in OPT1, while reduced in FP and OPT2 compared to CK. The highest amount of total biomass appeared in OPT1 with 42.11 nmol·g-1, and was followed by OPT2 with 40.16 nmol·g-1, which were both higher than that in CK (34.19 nmol·g-1), but the amount of total biomass in FP was 34.16 nmol·g-1, which was lower than that in CK. Moreover, the diversity of microbial community in OPT1 was more complex, and F/B value was the highest among the 4 treatments. In summary, the OPT1 treatment was more conducive to the stability of ecological environment in soil.

Key words: paddy, soil microbes, phospholipid fatty acid, nitrogen fertilizer management

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