简化整枝对抗虫棉主要经济性状的影响

Effects of Simplified Pruning on Main Economic Characters of Bt Cotton

[目的]探讨简化整枝对棉花生育状况和主要经济性状的影响,从而为棉花简化栽培技术体系的建立和运用提供理论基础。[方法]以精细整枝为对照,在山东气候条件下研究简化整枝对棉花生育状况、产量构成以及纤维品质的影响。[结果]在4.5万株/hm2密度下,不整枝能促使棉田封行期提前,而简化整枝和精细整枝的棉花生育状况基本一致;简化整枝与精细整枝的棉花产量和纤维品质均无差异,而不整枝易造成郁闭、烂铃,继而降低产量和纤维品质。[结论]简化整枝是一种有效的方法,有利于棉田机械化管理和采收。

[Objective]The aim was to study effects of simplified pruning on main economic characters of Bt cotton. [Method]The effects of simplified pruning method on developmental stages,yield components and fiber quality of cotton（ Gossypium hirsutum L.） were examined in2012 and 2013. At the same plant density（ 45 000 plants / hm^2）,plants of three cotton cultivars were treated under three different conditions,pruning with plant topping,pruning with plant topping,plus the removal all of branches under the 1 st fruiting branch,pruning with plant and branch topping,plus the removal of barren flower buds,vegetative and secondary fruiting branches. [Result]The results showed that,compared with pruning with plant topping and there were no significant differences in yield and fiber quality between pruning with plant topping,plus the removal all of branches under the 1st fruiting branch and pruning with plant and branch topping,plus the removal of barren flower buds,vegetative and secondary fruiting branches,higher yield and better fiber quality existed in group pruning with plant topping,plus the removal all of branches under the 1st fruiting branch and pruning with plant and branch topping,plus the removal of barren flower buds,vegetative and secondary fruiting branches. [Conclusion]It was concluded that simplified pruning could be an effective method for cotton production,and be suited for cotton mechanized harvesting.