六嗪酮在肯尼亚半控田间条件下的热带土壤中的消解。

The dissipation of hexazinone in tropical soils under semi-controlled field conditions in Kenya.

机构信息

Department of Chemistry, Maseno University, Maseno, Kenya.

出版信息

J Environ Sci Health B. 2009 Sep;44(7):690-6. doi: 10.1080/03601230903163772.

PMID:20183079

Abstract

The dissipation of hexazinone (Velpar) in two tropical soil types in Kenya was studied under field and semi-controlled conditions for a period of 84 days. The dissipation was found to be very rapid and this could be attributed to adverse weather conditions including high initial rainfall as well as to low soil-organic-matter content, volatilization, surface run-off and biodegradation. The DT(50) values of dissipation obtained by first order kinetics were 20 days and 21.3 days in clay and loam soil types, respectively. The influence of bargasse compost (1000 microg/g dry soil) was also studied and was found to enhance dissipation to some extent, giving DT(50) values of 18 days and 18.3 days in clay and loam soil types, respectively.

摘要

在肯尼亚的两种热带土壤类型下，对六嗪酮（Velpar）的消散进行了为期 84 天的田间和半控制条件下的研究。发现消散非常迅速，这可能归因于恶劣的天气条件，包括初始降雨高以及土壤有机质含量低、挥发、地表径流和生物降解。通过一级动力学获得的消散 DT（50）值分别为粘土和壤土土壤类型中的 20 天和 21.3 天。还研究了甘蔗渣堆肥（1000μg/g 干土）的影响，发现它在一定程度上促进了消散，分别在粘土和壤土土壤类型中给出了 DT（50）值为 18 天和 18.3 天。