Cotton (Gossypium hirsutum L.) reproductive development is affected by irrigation management and reduced soil moisture, leading to yield impacts. This study was conducted to determine how irrigation timing and reduced soil moisture affects the distribution of cotton reproductive structures throughout the canopy. Reduced soil moisture was achieved through varied irrigation amounts based on recommendations from an agroecosystem model. Plants from each irrigation treatment were destructively sampled bi-weekly and squares, green bolls, and abscissions were counted on mainstem fruiting branches. Plant height, leaf area, and dry weights of squares, flowers, and green bolls were measured. Reduced irrigation from first square to peak bloom reduced the number of green bolls in the lower middle quarter of mainstem nodes, where most bolls are located. Reproductive development and growth were most sensitive to reduced soil moisture treatments and irrigation rates from squaring to peak bloom, whereas the period from peak bloom to 90% open boll was unaffected by irrigation rates.

中文翻译：

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灌溉管理对棉花生殖发育和棉铃分布的影响

棉花（Gossypium hirsutumL.) 生殖发育受到灌溉管理和土壤水分减少的影响，从而导致产量影响。本研究旨在确定灌溉时间和减少的土壤水分如何影响棉花生殖结构在整个冠层的分布。根据农业生态系统模型的建议，通过不同的灌溉量来减少土壤水分。来自每个灌溉处理的植物每两周进行一次破坏性取样，并在主干果枝上计数方形、绿色铃和脱落。测量植物高度、叶面积和正方形、花和绿色铃的干重。从第一个方格到开花高峰期的灌溉减少，减少了大部分棉铃所在的主茎节的中下四分之一处的青铃数量。