作　　者： ; ; ; (陈泽鹏）;

机构地区： 云南农业大学植物保护学院

出　　处： 《广东农业科学》 2007年第2期59-61,共3页

摘　　要： 在烟草水培液中添加二氯喹啉酸，采用高效液相色谱分析法检测烟苗移栽后0、3、7、24h和30天二氯喹啉酸的消解率，结果表明：当添加量为0．36mg／L时，其消解方程为Cx=0．1833e^-0.03876t，半衰期为11．81天，r为0．9386；当添加量为0．18mg／L时，其消解方程为Cx=0．1048e^-0．0276t,半衰期为17．79天，r为0．8495。二氯喹啉酸对烟草幼苗生长的影响测定结果表明，在0．0005-5mg／L浓度范围内，烟苗的根短、茎长、鲜重轻，根长和烟芽鲜重明显受到抑制；在浓度为5mg／L时，畸形苗率达35％。 The residue of quinclorac in the culture solution can be remained for a long time. The degradation dynamic of quinclorac accorded with Cx=0. 1833e^-0.0387t（ r = 0. 9386, T1/2 = 11.81 days） when the culture solution was treated at the concentration of 0.36mg/L and Cx = 0.1048e^- 0.0276t at the concentration of 0.18 mg/L （ r = 0. 8495, T1/2 = 17.79 days ）. 30 days later, only 58.55 % - 76.06 % of the quinclorac was degraded. The roots of the seedlings was significantly inhibited in length, and the regression equation between quinclomc concentration and the inhibition of tobacco length was y = 2.5501 ＋ 0. 5785x （r = 0,9396）. The weight was inhibited and the regression equation between quinlcorac ooncentration and the weight of the tobacco was y = 1. 777 ＋ 0.6587x （ r = 0. 9740）. But most of the seedlings were deformed with shorter root, longer stem, lighter weight, and crimpy cotyledons, and the symptom was more obviously at a higher concentration.

关 键 词： 烟草 二氯喹啉酸 水体残留 消解动态

领　　域： [环境科学与工程] [农业科学] [农业科学]