Enhanced dissipation of xenobiotic agrochemicals harnessing soil microbiome in the tillage-reduced rice-dominated agroecosystem
Enhanced dissipation of xenobiotic agrochemicals harnessing soil microbiome in the tillage-reduced rice-dominated agroecosystem
复制标题
在免耕水稻为主的农业生态系统中，利用土壤微生物组增强外源农用化学品的消散
DOI：
10.1016/j.jhazmat.2020.122954
复制
发表时间：
2020-11-05
影响因子：
13.6
通讯作者：
Zhong, Guohua
中科院分区：
文献类型：
--
作者：
Liu, Jie;Song, Yuanfeng;Zhong, Guohua
频繁投入农产品的无处不在污染是影响农业生态系统生态可持续性的主要障碍。在这里，我们研究了在耕作强度管理下，在亚热带水稻占主导地位的景观中的多种农药的耗散，并揭示了土壤微生物组在促进异种生物降解中的至关重要作用。三种常用的农药（包括除草剂丁氯，杀虫剂的杀虫剂和杀菌剂三环唑）在进行耕作强度减少的田间中显示了快速的耗散动力学，并进行了稻草掺入。为了应对农药的暴露，土壤微生物群落迅速适应了社区组成和多样性的略有变化。同时，刺激了与土壤中有机碳和氮的增加有关的微生物异种降解相关功能。重要的是，这些变化和对微生物群落和功能的影响逐渐下降，这表明土壤微生物组在应对长期的异种生物疾病方面具有灵活性，以保持多样化和充满活力的土壤生物群。总体而言，我们的研究显示了增强的农业化学耗散，这从耕作管理和土壤微生物功能的相互作用显着受益，为促进绿色，平衡和可持续的农业提供了重要的基础和见解。
The ubiquitous contamination generating from the frequent input of agrochemicals is a major hurdle affecting the ecological sustainability of agroecosystems. Here, we investigated the dissipation of multiple pesticides in the subtropical rice-dominated landscapes under tillage intensity management, and unveiled the vital role of soil microbiome in promoting xenobiotic degradation. Three commonly used pesticides (including herbicide butachlor, insecticide clothianidin and fungicide tricyclazole) showed rapid dissipation dynamics in the field where the reduction of tillage intensity with straw incorporation was conducted. In response to pesticide exposure, soil microbial communities adapted quickly with slight changes in community composition and diversity. Meanwhile, the microbial xenobiotic degradation-related functions were stimulated, which possibly related to the increased organic carbon and nitrogen in soil. Importantly, these shifts and effects on microbial communities and functions gradually declined after a length of rice growing seasons, suggesting the flexibility of soil microbiome in tackling with long-term xenobiotic disturbance to maintain a diverse and vibrant soil biota. Overall, our study that displayed the enhanced agrochemical dissipation which benefited markedly from the interaction of tillage management and soil microbial functioning, provides important basis and insights for facilitating green, balanced and sustainable agriculture.