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除草剂在两种土壤酸盐溶解细菌上的作用:Pantoea agglomerans和Serratia rubidaeaea

Mohamed Maldani^1,2, Fatima Zahra Aliyat³, Marina Morabito⁴

¹Department of Biological & Forensic Sciences, Fayetteville State University, 1200 Murchison Road, Fayetteville, NC, 28301, USA. mohamed.maldani@gmail.com.

Ecotoxicology (London, England)

|July 5, 2023

概括

合成杀虫剂,如甘酸盐和酸盐会伤害有益的土壤微生物. 这项研究表明,这些除草剂显著降低了酸盐溶解细菌的活性,即使在推剂量下,也会影响植物生长.

科学领域:

农业科学农业科学
微生物学微生物学
环境科学环境科学

背景情况:

合成农药对于作物保护至关重要,但可能对土壤生态系统产生负面影响.
农药对土壤微生物群落的影响,特别是那些参与营养循环的微生物群落,如酸盐溶解细菌 (PSB),尚未完全理解.
酸盐 (P) 溶解是植物营养物质可用性的关键微生物过程.

研究的目的:

研究草甘和酸对两个PSB菌株 (Pantoea agglomerans和Serratia rubidaea) 的酸盐溶解活性的影响.
为了比较这些除草剂在pH调整和不调整的效果,因为pH影响P溶解.
评估除草剂暴露对PSB和随后的小麦苗木生长的影响.

主要方法:

评估了PSB菌株的三酸盐 (TCP) 溶解,使用酸盐-酸盐方法在不同度的草甘和酸盐的存在下进行了评估.
进行了一项温室实验,小麦幼苗用除草剂处理的PSB接种,以测量地表生长参数.
在受控条件下测量P溶解度和小麦生长参数 (25°C,16小时光/8小时黑暗).

主要成果:

草甘和酸都显著降低了P. agglomerans和S. rubidaea中的TCP溶解活性,即使在推的应用速率下也是如此.
与草甘相比,Paraquat在TCP溶解上表现出更明显的抑制作用.
根据除草剂和PSB菌株,TCP溶解的减少范围从39%到95%.
在温室实验中,小麦幼苗的生长反映了体外结果,表明除草剂对地面和地下的负面影响.

结论:

在推剂量下,草甘和酸会对酸盐溶解细菌的功能产生负面影响.
这些除草剂可以破坏基本的土壤微生物过程,导致营养素的可用性降低和植物生长受损.
这些发现强调了需要在农业实践中仔细考虑农药对地下土壤生态系统的影响.

关键词:

草甘是一种天然的草甘.杀草剂是一种除草剂.帕拉克瓦特 (Paraquat) 鱼是一种酸盐可溶性细菌是一种可溶性细菌.是一种的物质.

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