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.
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.
出处
《环境科学学报》
CAS
CSSCI
CSCD
北大核心
1993年第2期169-173,共5页
Acta Scientiae Circumstantiae
