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

作者：Shangdong Yang, Jian Xiao, Tian Liang, Weizhong He, Hongwei Tan · 发表于：AMB Express · 年份：2021 · DOI：10.1186/s13568-021-01331-4 · 被引用次数：76 · 研究领域：Soil Carbon and Nitrogen Dynamics、Sugarcane Cultivation and Processing、Mine drainage and remediation techniques

Abstract 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....