Effects of trifluralin on the soil microbial community and functional groups involved in nitrogen cycling

文献类型： 外文期刊

第一作者： Zheng, Yongquan

作者： Zheng, Yongquan;Du, Pengqiang;Wu, Xiaohu;Xu, Jun;Dong, Fengshou;Liu, Xingang;Zheng, Yongquan

作者机构：

关键词： Trifluralin; Soil microorganisms; Community structure; amoA; nifH

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN： 0304-3894

年卷期： 2018 年 353 卷

页码：

收录情况： SCI

摘要： Large amounts of trifluralin are applied each year for weed control; however, its effects on soil microbial communities and functions are unknown. Two agricultural soils, one silty loam and one silty clay were spiked with TFL (0, 0.84, 8.4, and 84 mg kg(-1)) and studied the effects using a laboratory microcosm approach. The half-lives were 44.19-61.83 d in all cases. Bacterial abundance increased 1.12-5.56 times by TFL, but the diversity decreased. From the next-generation sequencing results, TFL altered the bacterial community structure, which initially diverged from the control community structure, then recovered, and then diverged again. Linear discriminant analysis effect size indicated that Sphingomonas and Xanthomonadaceae were the predominant species on day 7 and 15 in TFL treatments. N-2-fixing bacteria were initially increased, then decreased, and then recovered, and it was positively correlated with NH4+-N content. Compared with the control, ammonia-oxidizing bacteria were decreased by 25.51-92.63%, ammonia-oxidizing archaea were decreased by 17.12-85.21% (except day 7), and the NO3--N concentration was also inhibited. In contrast to bacteria, fungal abundance was inhibited without any observable effects on fungal diversity or community structure. These results suggest that TFL impacts soil bacterial community and alters functional microorganisms involved in soil N processing.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序