【摘要】 [目的]明确甲基磺草酮对不同玉米品种的安全性。[方法]选取19种广泛种植的甜玉米品种为供试材料,并用150 g/hm2甲基磺草酮苗后处理玉米,以株高和鲜重抑制率为指标研究了不同品种甜玉米对甲基磺草酮的敏感性差异。[结果]各玉米品种对甲基磺草酮的敏感性差异显著,其中万甜2000对甲基磺草酮敏感度最低,无药害产生;金甜878对甲基磺草酮的敏感度最高,其株高和鲜重均大幅减少。[结论]对甲基磺草酮比较敏感的玉米品种,应适当降低用量,减少药害。更多还原

【Abstract】 [Objective] The aim was to study the security of mesotrione to different maize cultivars.[Method] 19 kinds of sweet corn(Zea mays L.) cultivars were treated by mesotrione accorrding to the post-emergence dosage of 150 g/hm2,and the sensitivity of sweet corn cultivars to mesotrione was determined by taking the inhibition rates of plant height and fresh weight as indexes.[Result] 19 kinds of sweet corn cultivars showed significant difference in the sensitivity to mesotrione.Wantian 2000 showed the lowest sensitivity to mesotrione,suffered from no injury,while Jintian 878 showed the highest sensitivity to mesotrione,with large decrease of plant height and fresh weight.[Conclusion] As for the sweet corn cultivars with high sensitivity to mesotrione,the application dosage of mesotrione should be decreased to reduce phytotoxicity.更多还原