莠去津对烟嘧磺隆药害及除草效果的影响.doc

莠去津对烟嘧磺隆药害及除草效果的影响
卢向阳,徐筠
(北京市农林科学院植物保护环境保护研究所,北京100097)
摘要:烟嘧磺隆在常规剂量下容易对敏感的玉米品种产生药害。盆栽试验表明,当烟嘧磺隆用量为90 g ./hm2时,%%,并且心叶卷曲;当烟嘧磺隆以相同的剂量添加莠去津,两者单位面积用量的比例为1:12~12:1时,玉米的药害程度随莠去津比例的提高而下降。当莠去津与烟嘧磺隆的用量比例小于6:1时,不能完全克服烟嘧磺隆的药害,而当它们的用量比例提高到12:1时药害症状完全消失。经两年田间试验证明,按照莠去津与烟嘧磺隆用量比例为12:1研制的19%烟•莠油悬剂,可以明显克服烟嘧磺隆对中度敏感玉米品种的药害,同时能够达到良好的除草效果。
关键词:玉米;烟嘧磺隆;药害
Effects of atrazine on nicosulfuron to corn injury and weed control
LU Xiang-yang,XU Jun
(Institute of Plant & Enviromental Protection, Beijing Academy of
Agricultural and Forestry Science, Beijing 100097,China)
Abstract: Corn cultivars susceptible to nicosulfuron were easy injured when applied at mended rate. The pot experiment showed that the height and aboveground weight of glutinous corn 203 were reduced by % and % respectively when nicosulfuron was applied at 90 g ./ha. Meanwhile, the central leaves were curly. Corn injured degree was inverse proportion to the ratio of atrazine/nicosulfuron within their applied ratio of 1:12~12:1. When their applied ratio was in less than 6:1, corn could not be pletely from injury. But thus could be done when their applied ratio was 12: field experiments over 2-ye period showed that the application of 19% nicosulfuron-atrazine OF, which was made from the ratio of atrazine/nicosulfuron 12:1, could prevent mid-susceptible cultivars from injury, while weed