| 双草醚在不同类型水稻土中的降解研究 |
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| 引用本文： | 杨仁斌,郑丽英.双草醚在不同类型水稻土中的降解研究[J].农业环境科学学报,2006,25(2):497-500. |
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| 作者姓名： | 杨仁斌 郑丽英 |
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| 作者单位： | 湖南农业大学农业环境保护研究所,湖南,长沙,410128 |
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| 摘 要： | 采用HPLC在室内条件下对红黄泥、潮沙泥和紫泥田3种不同类型水稻土中双草醚的残留消解动态进行了研究。结果表明,双草醚在3种水稻土中的降解符合一级动力学方程C=C0e-kt。未灭菌土壤中双草醚的平均降解半衰期分别为9.02、19.52、26.91d。分析认为,土壤微生物和pH值是影响双草醚降解的主要因素。土壤灭菌处理大大降低了双草醚的降解速率,且灭菌土中双草醚的滞留性还受农药浓度的影响,处理浓度高则半衰期长。
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| 关 键 词： | 双草醚 降解 微生物 稻田土 |
| 文章编号： | 1672-2043(2006)02-0497-04 |
| 收稿时间： | 2005-06-07 |
| 修稿时间： | 2005年6月7日 |
Degradation of Bispyribac-sodium in Different Types of Paddy Soils |
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| YANG Ren-bin,ZHENG Li-ying.Degradation of Bispyribac-sodium in Different Types of Paddy Soils[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2006,25(2):497-500. |
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| Authors: | YANG Ren-bin ZHENG Li-ying |
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| Institution: | Institute of Agro-Environmental Protection ,Hunan Agricultural University, Changsha 410128, China |
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| Abstract: | Residual dynamics of bispyribac-sodium in different types of paddy soils was studied in this paper.bispyribac-sodium residue was detected by HPLC and the experiment was conducted in the room temperature.The results showed that the degradation of bispyribac-sodium in soils answered to the first-order kinetics equation C=C0e-kt,and its average half-lives in three kinds of non-sterilized paddy soils were 9.02 d,19.52 d,and 26.91 d,respectively.It indicates that bispyribac-sodium is easily degraded in soil.The half-life of bispyribac-sodium decreased with the increase of soil pH value.After sterilization,bispyribac-sodium in soils degraded more slowly than that in the non-sterilized ones,indicating that microorganism would accelerate greatly the degradation of bispyribac-sodium in soils.Moreover,the higher concentration of bispyribac-sodium in soils was,the longer degradation half-life was. |
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| Keywords: | bispyribac-sodium degradation microbial biomass paddy soil |
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