除草剂对燕麦田杂草的防效及其对燕麦产量的影响

Effects of herbicides on weed control and grain yield of oat

通过田间试验研究了13种除草剂对燕麦田杂草控制及产量的影响.结果表明:10种苗期茎叶处理除草剂中,皮燕麦和裸燕麦田用药后30d,株防效和鲜重防效均以40%二甲.辛酰溴最高,分别为97.5%、99.0%和90.5%、98.0%;3种土壤处理除草剂以仲丁灵效果最佳;麦草畏对燕麦有轻微药害.除草剂对燕麦产量有显著影响,不同除草剂效应不同,皮燕麦、裸燕麦对除草剂的反应也不尽相同;裸燕麦在相同除草剂处理下产量增幅小于皮燕麦;除草剂的防效是影响燕麦产量的最主要因素,其次为小穗数、穗粒数、株高、穗长、千粒质量.

In order to select out effective and safe herbicide for oat field,the effects of 13 herbicides on weed control and grain yield of oat were conducted.The results showed that among 10 herbicides applied at oat seedling stage,40% Bromoxynil octanoate plus MCPA-sodium gave the highest plant fresh weight for both covered and naked oat（97.5%,99.0% and 90.5%,98.0%,respectively）.For 3 pro-emergence herbicides,Butralin was the best,and Dicamba had a slight toxic for oat.Herbicide had significant influence on oat grain yield,different herbicide had different effectiveness,while covered and naked oat had different reflection to the same herbicide.Under the same herbicide treatment,naked oat had a small yield increase compared with covered oat.The efficacy of the herbicide was the main factor affecting on oat grain yield,followed by number of spikelet,kernels per panicle,panicle length and thousand-kernel weight.