氯马宗对玉米的生物利用率和植物毒性取决于土壤特性，并可通过原位孔隙水进行估算。

IF 3.8 1区农林科学 Q1 AGRONOMY

Pest Management Science Pub Date : 2024-11-07 DOI:10.1002/ps.8531

Duantao Cao, Wenwen Peng, Hanghang Xu, Xiaoxiang Fu, Xia Gong, Sumei Yu, Hongyi Wei, Qinghong Zhou, Yingjin Huang

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引用次数: 0

摘要

背景土壤中残留的除草剂对后继作物造成的伤害经常被报道，这在很大程度上与土壤理化性质有关。阐明除草剂毒性与土壤特性之间的相互作用有助于根据当地土壤特性评估其植物毒性。结果在五种测试土壤中，氯马宗对玉米的植物毒性各不相同，根据添加浓度的不同，中位抑制浓度（IC50）值在 2.80 至 26.97 mg/kg 之间波动。玉米对克芜踪的吸收主要受其在土壤中吸附作用的影响，并与原位孔隙水（CIPW）中克芜踪的浓度呈正相关（R2 ≥ 0.775，P < 0.001）。与通过有机溶剂萃取确定的传统土壤中克芜踪浓度（Csoil）得出的结果相比，在所有五种土壤中，根据 CIPW 得出的 IC50 值（1.344-1.626 mg/L）一致，且变异系数低得多。使用 CIPW 而不是 Csoil 作为除草剂指标，可以更准确地评估其实际植物毒性。这些结果对于氯马宗的科学应用和玉米的安全生产具有重要意义。© 2024 化学工业协会。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Bioavailability and phytotoxicity of clomazone to corn depend on soil characteristics and can be estimated by in situ pore water

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Bioavailability and phytotoxicity of clomazone to corn depend on soil characteristics and can be estimated by in situ pore water

BACKGROUND

The injury caused by residual herbicides in soils to subsequent crops has been frequently reported and is largely related to soil physicochemical properties. Elucidating the interactions between herbicide toxicity and soil properties could help assess its phytotoxicity based on local soil characteristics. Here, the influence of soil properties on the accumulation and toxicity of clomazone as a model compound to corn was explored to obtain a universal indicator for estimating the toxicity of herbicides against crops.

RESULTS

The phytotoxicity of clomazone to corn differed in the five tested soils with the median inhibitory concentration (IC₅₀) values, according to the added concentration, fluctuating between 2.80 and 26.97 mg/kg. The uptake of clomazone by corn was primarily affected by its sorption onto soils and showed a positive correlation with the concentration of clomazone in in situ pore water (C_IPW) (R² ≥ 0.775, P < 0.001). In contrast to results derived from traditional soil clomazone concentrations (C_soil) determined through organic solvent extraction, consistent IC₅₀ values (1.344–1.626 mg/L) were obtained based on C_IPW in all five soils with a much lower coefficient of variation.

CONCLUSIONS

These findings indicate that measuring the concentration of clomazone in in situ pore water provides a reliable and comparable method for evaluating its bioavailability and phytotoxicity on corn. Using C_IPW rather than C_soil as a herbicide indicator is more accurate for assessing its actual phytotoxicity. These results are important for the scientific application of clomazone and the safe production of corn. © 2024 Society of Chemical Industry.

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来源期刊

Pest Management Science 农林科学-昆虫学

CiteScore

7.90

自引率

9.80%

发文量

553

审稿时长

4.8 months

期刊介绍： Pest Management Science is the international journal of research and development in crop protection and pest control. Since its launch in 1970, the journal has become the premier forum for papers on the discovery, application, and impact on the environment of products and strategies designed for pest management. Published for SCI by John Wiley & Sons Ltd.