摘要
【目的】筛选对冬麦田阔叶杂草防除效果好的化学药剂及其使用剂量,并评价其对小麦的安全性。【方法】采用随机区组的方法,定点取样调查各处理小区的杂草株数,测定各供试药剂对杂草的防治效果,小麦收获时测定各试验小区的产量,评价药剂对小麦生长的安全性。【结果】药后35 d,供试药剂在试验浓度下对冬麦田阔叶杂草的株防效在94%以上,鲜重防效在99%以上。小区产量测定,除40%唑草酮WG30 g a.i./hm^2处理的平均产量较对照略低外,其它各药剂处理产量均有增加,增加幅度在8.59%～13.06%。【结论】选用40%唑草酮WG 12 g a.i./hm^2+10%苯磺隆WP 15 g a.i./hm^2、10%苯磺隆WP 22.5 g a.i./hm^2、40%唑草酮WG 24 g a.i./hm^2和7.5%啶磺草胺WG 11.93 g a.i./hm^2,采用二次稀释方法进行配药,对水量675kg/hm^2,在冬麦拔节期前使用,可有效防除冬麦田阔叶杂草,且对小麦生长安全。
[ Objective ] The growth safety of wheat, variations of chemicals agents and their dosage which effectively control Descuralnla Sophia etc. in field of winter wheat were analyzed by using field screening. [ Method ] The method of randomized block experiment was used in field trial, the amount of weeds was investigated before spray, and the growth safety of wheat was investigated through eye - measurement after 3 days, 7 days, the control effect on broadleaves weeds were investigated after 15 days, 35 days. The yield of wheat was measured in harvesting period. [ Result ] The results showed that the test agents have effectively controlled broadleaves weeds in field of winter wheat. The control effect of each plant was over 94%, and the fresh weight per plant was over 99%. The yield of control groups was increased by 8.59% - 13.06% compared with contrast groups except 40% Caffentrazone, and the yield of the plants which were treated by other medicament was significantly increased. [ Conclusion ] To effectively control the broadleaves weeds like Descurainia Sophia ete in wheat planting areas in southern Xinjiang, 40% Carfentrazone WG 24 g a. i. /hm^2, 40% Carfentrazone DF 12 g a. i. /hm^2 ＋ 10% Tribenuron - methyl WP 15g a. i. /hm^2, 10% Tribenuron - methyl WP 22.5 g a. i. /hm^2 , 7.5% Pyroxsulam WG 11.93 g a. i. /hm^2, can be applied by using the method of double dilution to dispense chemicals. The water volume is 675 kg/hm^2. This has been proven to be safe to the growth of the wheat.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2011年第9期1661-1664,共4页
Xinjiang Agricultural Sciences
基金
国家科技支撑计划课题(2009BADA4B00)
公益性行业(农业)科研专项经费(201003043-06)
现代农业(小麦)产业技术体系(MATS)专项
关键词
除草剂
阔叶杂草
防治效果
安全性
herbicides
broadleaves weeds
control effect
safety
