不同行距配置下脱叶剂对棉花综合性状的影响

The Effect of Defoliant on the Comprehensive Characters of Cotton with different Row Spacing

为筛选出适用于新疆生产建设兵团第七师垦区的机采棉行距配置模式及脱叶催熟剂的施用方法,2018年在七师农科所试验地开展了田间小区试验。设(66+10)cm和76 cm 2种机采棉行距配置模式种植棉花,并采用不同方法喷施脱叶催熟剂;调查检测各处理组棉花的脱叶率、吐絮率、产量及相关性状,通过灰色关联度法评价棉花的综合性状。结果表明,2种行距配置模式下棉花纤维品质无显著差异,但76 cm等行距配置模式下喷施1次脱吐隆的棉花综合评判值最高,达0.9253,且棉花单铃重、子指及产量均高于(66+10)cm配置模式。使用脱叶催熟剂不影响棉花各性状,同时能显著提高棉花脱叶率及吐絮率。因此,推荐在七师垦区采用76 cm等行距配置模式且喷施1次脱吐隆。

To screen the row spacing configuration mode and the application method of defoliation suitable for the row spacing of machine picking cotton in reclamation area,the field plot experiment was carried out in the Agricultural Production Division 7 in 2018.The cotton were planted in 2 row spacing configurations((66+10)cm and 76 cm),and sprayed the defoliants with different methods.Therefore,we investigated the defoliation rate,boll opening rate,yield,and characters of cotton,and evaluated the comprehensive properties of cotton through Grey Relevant Analysis.The results showed that there was no significant difference in cotton fiber quality,while the highest comprehensive evaluation value of cotton was up to 0.9253 in 76 cm and sprayed Dropp ultra once.In addition,it had no effect on cotton characters but could improve the rate of cotton defoliation and boll opening significantly after sprayed the defoliants.To Summarize,it is recommended to use 76 cm equidistant configuration mode and spray Dropp ultra once in the 7 Division reclamation area.