【目的】明确化学封顶棉花高产的理想株型,为株型塑造提供参考依据,以提高化学封顶剂的使用效果,使化学封顶棉花能够保持稳定高产。【方法】通过田间培育和定点取样,研究人工打顶、化学封顶的低产棉田和高产棉田的株型特征,进行数据分析和产量对比。【结果】化学封顶的高产田封顶效果好,化封后株高增加控制在5 cm以内,而化学封顶一般产田棉花株高增加普遍在5~10 cm;化封后上部主茎节间变短,倒一主茎节间长度不超过3 cm,倒三和倒五主茎节间容易变长,其调控情况对株高影响较大;化学封顶后棉株上部果枝变短,尤其是倒一果枝变化明显;化学封顶的高产田棉株上部结铃高于化学封顶的一般产田,与人工打顶棉田没有差异,主要依靠内围铃,且三桃比例分部合理。【结论】化学封顶高产田的棉花产量比人工打顶的还要高,在合理调控和化学封顶条件下,能够有效控制棉花株高,塑造高产株型,代替人工打顶并实现高产。 【Objective】 The purpose of this study was to determine the ideal plant type for high cotton yield of chemical capped cotton and to provide a reference for plant type molding in order to enhance the effect of chemical capping agent and make it stable and high yield. 【Method】 The plant type characteristics of artificial topping and chemical capping low yielding cotton and high yielding cotton fields were studied through field cultivation and fixed point sampling. Data analysis and yield comparison were conducted. 【Result】 The result showed that the capping effect of chemical capped high-yield field was good, the increase of plant height was controlled within 5 cm after chemical capping, while the plant height of chemical cap yield increased generally from 5 cm to 10 cm. Short, inverted one main stem internode length of not more than 3 cm, inverted and inverted five main stem internodes tend to become longer, the regulation of the situation has a greater impact on the plant height; chemical cap after the upper cotton branches shorter, especially down A branch of obvious changes; chemical capped high-yielding cotton plant upper knot higher than the chemical cap yield of general field, and artificial cotton fields without any difference, mainly rely on the inner ring bell, and three peach proportion division reasonable. 【Conclusion】 The yield of cotton in chemical capping high-yielding field is higher than that of artificial capping. Under the condition of reasonable regulation and chemical capping, cotton plant height can be effectively controlled and high-yield plant type can be molded instead of artificial topping and high yield.