研究论文
俞康宁,戚澄九,唐柯,陈忠孝.稻田环境与除草剂去草胺降解速率的关系[J].环境科学学报,1993,13(2):169-173
稻田环境与除草剂去草胺降解速率的关系
- RELATIONSHIP BETWEEN DEGRADATION RATE OF BUTACHLOR AND CONDITIONS OF PADDY FIELDS
- 基金项目：
- 作者
- 单位
- 俞康宁
- 浙江农业大学植保系, 杭州 310029
- 戚澄九
- 浙江农业大学植保系, 杭州 310029
- 唐柯
- 浙江农业大学植保系, 杭州 310029
- 陈忠孝
- 中国水稻研究所,杭州
- 摘要：在稻田自然环境中,去草胺乳油和颗粒剂的残留半衰期,在田水中分别为1.65-2.84d和5.78-6.30d,在土壤中分别为2.67-5.33d和4.95-6.30d.经过水稻一个生育期,去草胺在糙米等样品中的最终残留量均降至可检水平以下.土壤微生物对去草胺的降解起着主导性的作用,在灭菌和不灭菌土壤中的残留半衰期分别为433d和18.50-29.40d.去草胶在涂土等四类不同属性的土壤中的渗漏性大小顺序,依次为涂土、小粉土、青紫泥和红壤.
- Abstract：Under natural conditions of paddy field, the half-life of butachlor was determined to be 1. 65-2. 48 days for emulsion and 5. 79-6. 30 days for pellet. In soil, the half-life was found to be 2. 67-5.33 days and 4.95-6. 30 days, respectively. After passing a paddy cultivation period, the residue in brow rice was dropped below detection limit. Microbe in soil exerts a significant effect on the degradation of butachlor. The half-life of butachlor in sterile and non-sterile soils was 433 days and 18. 5-29. 4 days, respectively. The seepage of butachlor in various types of soils decreased in the order of powdery soil, loam, indigo-blue soil and red soil.
- Key words：butachlor degradation seepage residue
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