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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Studies on bound (14)C-chlorsulfuron residues in soil.
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Studies on bound (14)C-chlorsulfuron residues in soil.

机译：土壤中结合的（14）C-氯磺隆残留物的研究。

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摘要

The cause for phytotoxicity of bound residues of chlorsulfuron (2-chloro-N-[[4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino] carbonyl]benzenesulfonamide) to rotational crops is unknown. This study was conducted to determine the formation of nonextractable (bound) residues of chlorsulfuron in soil, and the distribution of bound residues in different organic matter fractions. The results showed that over 150 days, the extractable fraction of (14)C-residues decreased to 25.1% of applied chlorsulfuron, while bound residues concurrently increased to 47.1%. The distribution of (14)C-bound residues in soil organic matter fractions followed an order of humic acid (HA) < humin < fulvic acid (FA). Although the most bound residues were detected in the FA fraction, the amount associated with the humin fraction increased with time. After soil treatment by autoclaving, it was found that bound (14)C-chlorsulfuron residues became available again in the soil. One of the released products was 2-amino-4-hydroxyl-6-methyl-1,3,5-triazine (identified by GC-MS), which is a degradation product of chlorsulfuron.
机译：氯磺隆（2-氯-N-[[4-甲氧基-6-甲基-1,3,5-三嗪-2-基）氨基]羰基]苯磺酰胺的结合残留物对轮作作物的植物毒性的原因尚不清楚。进行这项研究是为了确定土壤中氯磺隆的不可提取（结合）残留物的形成，以及结合残留物在不同有机物组分中的分布。结果表明，在150天的时间内，（14）C残留物的可提取分数降低到所施加的氯磺隆的25.1％，而结合的残留物同时增加到47.1％。 （14）C结合残基在土壤有机质组分中的分布遵循腐殖酸（HA）<腐殖质<黄腐酸（FA）的顺序。尽管在FA级分中检测到结合最多的残基，但与腐殖质级分相关的数量随时间增加。通过高压灭菌处理土壤后，发现结合的（14）C-氯磺隆残留物在土壤中再次可用。释放的产物之一是2-氨基-4-羟基-6-甲基-1,3,5-三嗪（通过GC-MS鉴定），它是氯磺隆的降解产物。

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