[(14)C]甲霜灵在典型印度土壤中的持久性、归宿及代谢

Persistence, fate, and metabolism of [(14)C]metalaxyl in typical Indian soils.

作者信息

Sukul P, Spiteller M

机构信息

Institute of Environmental Research, University of Dortmund, D-44221 Dortmund, Germany.

出版信息

J Agric Food Chem. 2001 May;49(5):2352-8. doi: 10.1021/jf001181r.

DOI:10.1021/jf001181r

PMID:11368603

Abstract

The biodegradation of ring-labeled [(14)C]metalaxyl in six Indian soils was examined. The total recovery of radioactivity from soil was 100 +/- 6% of the applied radioactivity. Volatile organics and (14)CO(2) were detected at lower levels. This suggests that neither mineralization nor volatilization is a major route of metalaxyl dissipation. The most rapid degradation of metalaxyl was observed in Bannimantap soil, in which the half-life of metalaxyl was 36 days. An inverse relationship was found when half-lives were plotted against microbial biomass and soil clay content. However, soil total organic carbon did not correlate with metalaxyl persistence. Five metabolites detected by thin-layer chromatography were more polar than metalaxyl.

摘要

研究了环标记的[(14)C]甲霜灵在六种印度土壤中的生物降解情况。土壤中放射性的总回收率为施加放射性的100±6%。挥发性有机物和(14)CO(2)的检测水平较低。这表明矿化和挥发都不是甲霜灵消散的主要途径。在班尼曼塔普土壤中观察到甲霜灵降解最快，其中甲霜灵的半衰期为36天。当将半衰期与微生物生物量和土壤粘土含量作图时，发现呈反比关系。然而，土壤总有机碳与甲霜灵的持久性没有相关性。通过薄层色谱法检测到的五种代谢物比甲霜灵极性更强。