【摘要】 在陇东旱塬条件下,测定了几种茎叶处理除草剂桶混配方在玉米田的应用效果。结果表明,4%烟嘧磺隆SC+30%辛酰溴苯腈EC、4%烟嘧磺隆SC+75%二氯吡啶酸SG+90%莠去津WG和4%烟嘧磺隆SC+48%苯达松AS控草效果较好,对禾本科杂草的株防效分别达到94.84%,90.76%和84.28%,鲜质量防效分别达到99.65%,99.84%和98.39%,对阔叶杂草的株防效分别达到95.52%,100%和83.26%,鲜质量防效分别达到99.99%,100%和99.97%;对玉米安全性好,其产量较人工除草略有增减,分别增产0.05%、增产2.81%和减产3.90%,适宜在陇东地区玉米田大面积推广应用。4%烟嘧磺隆SC+100 g·L^-1硝磺草酮SC控草效果好,但对玉米有隐性影响,减产幅度较大,较人工除草减产16.12%,在生产上要谨慎选用。其他配方和单剂不能有效控制禾本科杂草,且对玉米安全性较差,应避免使用。更多还原

【Abstract】 Under the conditions of dryland in eastern Gansu, the control effect of several mixed herbicides in corn field were determined. The results showed that the plant control effect of weeds of 4% nicosulfuron SC+30% bromoxyniloctanoate EC, 4%nicosulfuron SC+75% clopyralid SG+90% atrazine WG, 4% nicosulfuron SC+48% bentazone AS were 94.84%, 90.76% and 84.28%, respectively.The fresh quality control effect were 99.65%, 99.84% and 98.39%, respectively. The mixed herbicides effectively controlled broadleaf weeds with 83.26% ～100% plant density reduction and 99.97% ～100% fresh quality inhibition. It was high safety for corn, the yield increased slightly or decreased by 0.05%, 2.81% and 3.90%, respectively. The mixed herbicides were suitable to be popularized in the large area of the corn field in eastern Gansu. The control effect of 4%nicosulfuron SC+100 g·L^-1 mesotrione SC was good, but it has a recessive effect on corn, the reduction of yield was larger than that of artificial weeding by 16.12%, and the production should be carefully selected. The control effect of grass weeds of other herbicides were not good and the safety of corn was poor, so it should be avoided in production.更多还原