烟稻轮作系统水稻除草剂用量对烟草叶片的影响及其土壤残留

摘要

The paper studied the effect of different concentrations of herbicide in the rice season of tobacco -paddy rotation on tobacco leaf and its pedorelict,which provided a basis for tobacco production safely and reasonable applying of herbi-cides in previous crop.Results show that under tobacoo -paddy rotation system,the use of quinclorac in the rice season af-fects growth and development of tobacco crop,it appeares moderately to severe phytotoxicity when the quantity of quinclorac using was more than 1 500 g/hm2 ,Meanwhile,the quantity of quinclorac using was 7 500 g/hm2 ,the content of quinclorac in the tobacco leaves was 0.00648 ~0.103 mg/kg,and in the soil was 0.169 ~0.772mg/kg,and seriously affected the quality of tobacco leaf and subsequent processing production.%通过大田试验研究烟稻轮作系统水稻季施用不同浓度的除草剂的土壤残留量以及对烟草叶片的影响，为烟草安全生产和上茬作物除草剂合理使用提供依据。结果表明，在烟稻轮作系统下，水稻季施用二氯喹啉酸对后茬作物烟草的生长发育造成影响，水稻季施用二氯喹啉酸（50％有效成分）总量超过1500 g／hm2时会出现中重度的药害。同时，当二氯喹啉酸（50％有效成分）使用量超过750 g／hm2，烟叶中二氯喹啉酸的含量为0.00648～0.103 mg／kg，而土壤中二氯喹啉酸的含量为0.169～0.772 mg／kg，严重影响烟叶的品质和后续的加工利用。