南疆棉花化学打顶剂应用研究

Research on cotton Spraying of Chemical Topping in Southern Xinjiang

为了验证棉花化学打顶剂代替棉花人工打顶及抑制棉花顶端生长的作用,形成一套棉花化学打顶整体实施技术,用于降低劳动强度和生产成本。2014年利用由国家棉花产业技术体系栽培研究室棉花化学调控团队提供化学打顶剂(M剂和Y剂)在新疆图木舒克开展棉花打顶试验。结果表明:化学打顶剂可以起到有效控棉株生长的作用,且比人工打顶更能改善棉田上部群体结构,提高棉田通风透光性,但对衣分、绒长、单铃重等影响不大,对产量促进作用也不大,株高低于不打顶处理,而高于人工打顶处理;不孕籽率较人工打顶和不打顶处理偏少。

In order to verify the chemical agent to replace artificial cotton topping and inhibition of cotton top growth, form a set of cotton chemical top overall implementation technique used to reduce labor intensity and production cost.Using of chemical agent （Magent and Y agent）provided by cotton chemical control topping team of cultivation research room of nation-al cotton industry technical system was carried out cotton topping test in Xinjiang Tumushuke in 2014.The results showed that the chemical topping agent played the effective to control cotton growth,and more to improve cotton upper population structure than the artificial cotton topping,improve ventilation and light transmission,but had little effect on lint percentage ,fiber length,single boll weight,yield promotion effect.Plant height was lower than non decapitation treatment,and higher than the artificial topping treatment.Sterile seed rate was less than artificial and not topping treatment.