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在零耕作热带大米农业生态系统中,解读根球微生物群落和土壤参数在除草剂的影响下的洞察力

Laliteshwari Bhardwaj¹, Bhaskar Reddy², Suresh Kumar Dubey¹

¹Department of Botany, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, 221005, India.

Environmental research

|September 3, 2023

概括

除草剂,如甲和甲甲对热带大米土壤的微生物群落和土壤特性产生了负面影响. 虽然残留物减少了,但微生物生物质,酶活性和多样性都出现了减少,影响了土壤健康.

科学领域:

土壤微生物学土壤微生物学
环境科学环境科学
农业学是一种农业学.

背景情况:

在大米种植中广泛使用除草剂对土壤生态系统构成风险.
了解除草剂对土壤微生物群落的影响对于可持续农业至关重要.
热带大米田的零耕作种植需要仔细管理化学投入.

研究的目的:

调查甲和前提对热带大米田土壤特性的影响.
分析对树根球微生物社区结构和丰富性的影响.
评估在零耕地土壤中除草剂残留物的持久性和降解.

主要方法:

在零耕作热带大米田中应用潘迪米他林 (0.5千克/ha-1) 和普雷蒂拉克 (0.6千克/ha-1).
在60天内监测除草剂残留物水平.
分析土壤变量,包括微生物生物质 (MBC),矿物 (Mineral-N) 和酶活动.
定量PCR用于微生物丰富性和高通量测序 (16SrRNA和ITS) 用于细菌,古生物和真菌的基因组分析.

主要成果:

应用后60天,除草剂残留物减少到无法检测的水平.
土壤变量,包括微生物生物质,MBC,MBN和酶活动,与对照组相比,处理过的土壤略有减少.
甲基因组分析确定了在古生物 (Nitrososphaera),细菌 (Neobacillus) 和真菌 (Fusarium) 中占主导地位的微生物种群,在中期开花阶段的数量最大.

结论:

建议剂量的甲和前提甲对零耕作水系统的土壤微生物动力学和多样性有害.
除草剂残留物和土壤变量之间存在负相关性,可能会改变微生物社区结构.
结果为环保的水农业提供了洞察力,突出了对微生物在土壤肥力中的作用进行长期研究的需要.

关键词:

杀草剂是一种除草剂.甲基基因组是指甲基因组中的一部分.微生物社区的微生物社区.里索斯菲尔是什么意思里索斯菲尔是什么意思一个大米田是一个大米田.土壤参数土壤参数零耕作作业的作物种植方式

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