在土壤植物系统中杀菌剂阿佐克西斯特罗宾的分布和积累动态
Chengrui Wan1, Huiying Dong2, Yuhan Du2
1College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; College of Science, China Agricultural University, Beijing, 100193, China.
Environmental research
|March 10, 2025
概括
基斯特罗宾真菌杀菌剂在胡植物的根和地表土壤中积累,在芽中存在的最小. 这项研究显示,表层土壤是主要的水库,表明了潜在的环境持久性风险.
科学领域:
- 环境科学 环境科学
- 农业化学 农业化学
- 生态毒理学 生态毒理学
背景情况:
- 阿佐克西斯特罗宾是一种用于控制等作物的真菌病的斯特罗比素杀菌剂.
- 人们对其在环境中的持久性和在土壤植物系统中的生物积累存在担忧.
- 了解阿佐克西斯特罗宾在土壤和植物中的命运对于评估环境影响至关重要.
研究的目的:
- 为了研究 (Capsicum annuum L.) 土壤植物系统中阿佐克西斯特罗宾的分布和积累动态.
- 在不同的土壤深度和植物组织中分析阿佐克西斯特罗宾的行为.
- 评估农药持久性和积累对环境的影响.
主要方法:
- 现场研究涉及对胡作物的阿佐克西斯特罗宾应用.
- 高性能液体染色学与并联质谱学 (HPLC-MS/MS) 进行样本分析.
- 随着时间的推移,监测地表土壤,地下土壤,根和芽中的农药度.
主要成果:
- 芽中的阿佐克西斯特罗宾度仍然很低;根中的度随着时间的推移而增加.
- 表面土壤在第10天左右显示出度的高峰,随后下降.
- 杀虫剂的分布按照以下顺序进行:地表土壤 > 地下土壤 > 根 > 芽. 生物度因子 (BCF) >1,而生物积累系数 (BAC) 和转移因子 (TF) <1.
结论:
- 在这个系统中,地表土壤充当了氧素的主要储存库.
- 观察到阿佐克西斯特罗宾从根部转移到芽部的转移有限.
- 这些发现突出了农药在土壤中持续存在的潜在风险,需要优化农业实践.
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