精恶唑禾草灵防除油菜田外来入侵杂草野燕麦的效果及其对产量、光照和养分的影响

Effect of fenoxaprop-P-ethyl on preventing invasive wild oat weed and wild oats from rape field and its effects on yield,light and nutrients

为明确10%精恶唑禾草灵乳油对油菜田外来入侵杂草野燕麦的防除效果及对油菜产量的影响,研究设置10%精恶唑禾草灵乳油4个剂量处理,并设清水对照处理,在杂草2~4叶期进行茎叶喷药。于药后30、45、60 d分别监测杂草种群数量,同时取样分析杂草对水肥的累积情况,于油菜收获后进行测产。结果表明,施用10%精恶唑禾草灵乳油67.50~157.50 g(a.i.)/hm^(2)防除移栽油菜田野燕麦效果显著,对野燕麦的鲜重防效达97.2%~100%,有效改善了田间的光照和水肥条件,油菜产量达1940.9~2032.3 kg/hm^(2),产量较空白对照增产35.4%~41.7%,增收2535.5~2992.5元/hm^(2)。10%精恶唑禾草灵乳油推荐用量为67.50~90.00 g(a.i.)/hm^(2)。

The experiment was conducted to determine control effect of 10% fenoxaprop-P-butyl emulsifiable concentrate(EC)on wild oat weed in rape field. The experimental design consisted of four dosages of 10% fenoxaprop-P-butyl EC and untreated control.Herbicides were applied at 2 to 4 leaf stage of weeds. Weed population was evaluated 30,45,60 d days after herbicide application.The rape seed yield,light intensity,N,P,K and water contents were also analyzed following treatment with 10% fenoxaprop-P-butyl EC. Results indicated that 10% fenoxaprop-P-butyl EC 67.50~157.50 g(a.i.)/hm^(2) provided good control on Avena fatua in rape fields.The fresh weight control effect on Avena fatua ranged from 97.2% to 100%. The light intensity,water and nutrient contents were greatly improved after treated with fenoxaprop-P-butyl. The rape seed yield was ranged from 1 940.9 to 2 032.3 kg/hm^(2) in all fenoxapropP-butyl treatments,increased by 35.4% to 41.7% compared to the untreated control. Moreover,the yield income increased by 2 535.5 to 2 992.5 Yuan/hm^(2). The recommended dosage of 10% fenoxaprop-P-butyl EC was 67.50 to 90.00 g(a.i.)/hm^(2).