玉米对磺酰脲类除草剂敏感性及土壤残留的研究

The Study on Sensitivity and Remain of Sulfonyluerea Herbicides to Maize Varieties

采用室内模拟添加法、盆栽法和土壤残留动态试验法,分别研究了不同玉米品种对磺酰脲类除草剂的敏感性、磺酰脲类除草剂对敏感玉米品种苗期影响和磺酰脲类除草剂在土壤中的残留期。结果表明:供试玉米品种对磺酰脲类除草剂存在不同程度的敏感性差异,该类除草剂ED50以上浓度对玉米苗期的根长、株高、叶面积有明显的影响。同时,3种磺酰脲类除草剂苯磺隆、噻磺隆和苄嘧磺隆在土壤中的残留期分别为69、79和150d,并且存在着一定的差异。

Adopting indoor simulations add law ,and soil remain trends law of testing cultivated in a pot laws.It is separately different to study maize variety for sulphur acyl urea type the sensitivenesses of weed killers. To sensitive maize influence by＇ variety seeding stage acyl urea type weed killer sulphur. The result shows： Support and try on maize there is sensitiveness difference in varying degrees to sulphur acylurea type weed killer by variety. At maize seeding stage long root ,one high, the area of leaf have obvious influence the weed killer ED more than. Besides,3 kinds of sulfonylurea herbicides Thifensulfuron-methyl, Tribenuron- methyl and Bensucfuron-methyl itting remains to be 69 d, 79 d, 150 d respectively in period among soilses, and certain difference exists.