株型对棉铃时空分布及素质的影响

Effects of Plant Types on Spatio-Temporal Distribution and Quality of Cotton Bolls

1 997～ 1 998年研究了株型对棉花结铃时空分布及棉铃素质的影响。结果表明 ,简化整枝棉花最大成铃高峰期推迟 ,伏桃数量和所占比例降低 ,主茎各果枝、果节结铃数减少 ,所占比例降低 ,平均单铃重和衣分降低 ,但叶枝可间接结铃 ,完全可以补偿主茎结铃减少数量 ,故群体总结铃数增加 ,子棉和皮棉产量与对照持平或略增产。简化整枝早打主茎顶心 ,可提高棉株基部、中下部果枝结铃数和所占比例 ,叶枝结铃数增加 ,成铃高峰期提前 ,伏桃数量和所占比例增大 ,衣分提高 ,但群体铃数、全株平均单铃重并未增加 ,对子棉。

During 1997～1998, The effects of Plant types on spatio temporal distribution and quality of cotton bolls were studied. It was showed that with limited pruning (top shoot nipping of main stem and vegetative branches only), the peak of maximum fruit retention of cotton plant was postponed. The number and percentage of summer boll, the number and percentage of bolls on fruiting branches and internodes, average weight per boll and lint percent were reduced. However ,the number of total bolls increased , the yield of seed cotton and lint cotton was no less than that with traditional pruning. Limited pruning with earlier top shoot nipping could increase the number and percentage of bolls on basal and base middle fruiting branches, increase the number of bolls on vegetative branches, advance the peak of fruit retention, increase the number and percentage of summer boll, and increase lint percent. But there was no increase in the number of total bolls or average weight per boll. No remarkable effects on the fiber quality and yield of seed cotton and lint cotton were found.