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Response of soil biological properties and bacterial diversity to different levels of nitrogen application in sugarcane fields

文献类型： 外文期刊

作者： Yang, Shangdong 1 ; Xiao, Jian 1 ; Liang, Tian 2 ; He, Weizhong 2 ; Tan, Hongwei 2 ;

作者机构： 1.Guangxi Univ, Agr Coll, Guangxi Key Lab Subtrop Bioresource Conservat & U, Nanning 530004, Peoples R China

2.Guangxi Acad Agr Sci, Guangxi Key Lab Sugarcane Genet Improvement, Nanning 530007, Peoples R China

关键词： Sugarcane; Nitrogen stress; Soil enzyme; Microbial biomass; Bacteria; Diversity

期刊名称：AMB EXPRESS （ 影响因子：4.126； 五年影响因子：4.245 ）

ISSN： 2191-0855

年卷期： 2021 年 11 卷 1 期

页码：

收录情况： SCI

摘要： To select an eco-friendly nitrogen (N) application level for sugarcane production, soil fertility and soil bacterial diversity under different nitrogen application levels were analyzed. Four levels of urea applications were high Nitrogen (H, 964 kg ha(-1)), medium Nitrogen (M, 482 kg ha(-1)), low Nitrogen (L, 96 kg ha(-1)) and no Nitrogen (CK, 0 kg ha(-1)) treatments, respectively. The results showed that the soil microbial biomass carbon and phosphorus were altered significantly by CK and L treatments. Moreover, the indexes of soil bacterial richness and diversity in the sugarcane field could be significantly improved by L. At the genus level, SC-I-84, Mycobacterium, Micropepsaceae, Saccharimonadales, Subgroup_2 and Acetobacteraceae were the unique dominant bacteria in the soil with the H treatment. JG30-KF-CM45 and Jatrophihabitans were the unique dominant genera in the M treatment. Subgroup_6, HSB_OF53-F07, Streptomyces, 67-14, SBR1031 and KD4-96 were the unique dominant genera in the L treatment. In contrast, FCPS473, Actinospica, 1921-2, Sinomonas, and Ktedonobacteraceae were the unique dominant genera in the CK treatment. The findings suggest that soil fertility all could be changed by different N application levels, but the most increasing integral effect only could be found in L. Moreover, even though soil bacterial richness could be significantly promoted by the M and H treatments, but soil bacterial diversity could not be significantly improved. On the contrary, soil bacterial diversity and richness all could be improved by L treatment. In addition, higher abundance of unique soil dominant bacteria could be only found in L treatment which compared to the CK, M and H treatments. These findings suggest that the rate of 96 kg ha(-1) N application is ecofriendly for sugarcane production in Guangxi.

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