研究论文
汪海珍,徐建民,谢正苗,叶庆富.甲磺隆在土壤腐殖物质中结合残留的动态变化[J].环境科学学报,2002,22(2):252-260
甲磺隆在土壤腐殖物质中结合残留的动态变化
- Dynamics of bound residues of metsulfuron-methyl in soil humus
- 基金项目：国家自然科学基金(49871044);浙江省自然科学基金(RC99032;498014);高等学校优秀青年教师教学科研奖励计划资助项目
- 作者
- 单位
- 汪海珍
- 浙江大学土水资源与环境研究所, 杭州 310029
- 徐建民
- 浙江大学土水资源与环境研究所, 杭州 310029
- 谢正苗
- 浙江大学土水资源与环境研究所, 杭州 310029
- 叶庆富
- 浙江大学土水资源与环境研究所, 杭州 310029
- 摘要：土壤中14C甲磺隆的可提取态残留物随时间延长不断降低,而其结合态残留率第28天达最高.14C甲磺隆结合态残留物在土壤腐殖物质中的分布是:富啡酸胡敏素>胡敏酸.在处理最初28天,富啡酸中14C甲磺隆结合态残留物不断增大,随后减少;胡敏素中的结合态残留量在28—224天变化不大.14C残留物在不同土壤之间的结合及其分布都是有差异的,与土壤pH值、粘粒矿物类型等都有密切关系.
- Abstract：The results showed that extractable 14C metsulfuron methyl residues decreased with time over the incubation period of 224 day, while the highest amounts of bound residues in soils were at the 28th day after application. The proportions of metsulfuron methyl 14C bound residues in soil humus components increased in the order of fulvic acidhumin>humic acid. The amounts of bound residues in fulvic acid increased during the initial 28 days, and then decreased. The amounts of bound residues in humin did not change significantly with time from the 28th to the 224th day after application. The distribution of metsulfuron methyl 14C bound residues in soil humus varied with soil types and properties, it was strongly correlated to soil pH and clay minerals.
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