不同栽培条件对膜下滴灌棉花叶面积指数及品质和产量的影响

Effects of Cultivation Conditions on Leaf Area Index,Quality and Yield of Cotton under Mulched Drip Irrigation

在不同的栽培条件下,对新疆库尔勒市膜下滴灌棉花生育期间叶面积指数动态变化和品质及产量进行了系统的研究。结果表明,棉花全生育期叶面积指数呈单峰曲线变化,峰值在盛铃期。通过深翻耕有机肥促进了叶面积指数和株高的增大,但缺少一定的化控等措施,造成后期植株的凸长,导致有效光合面积减小,产量有所下降。而在生育期随水滴施多效唑适当地降低了株高和减小了叶面积指数,优化了株型,在没有降低单铃重的情况下增加了铃数,产量分别较叶面喷施缩节胺、深翻耕和常规漫灌提高了2.4%、5.5%和30.6%,衣分率达到了44.70%,增产效益显著。叶面喷施缩节胺和随水滴施多效唑在品质上具有互补效应。

The dynamic change of cotton plastic mulching by drip irrigation LAI and quality and yield was studied under different cultivation conditions during growth in Korla city. The results showed that LAI of cotton changed as a curve and its peak emerged at fool-boll stage. LAI and height are increased through deep tillage fertilixation but because without chemistry control measures lead to plant rapidly growth in late stage and effective photosynthetic decreased so yield is decreased slightly. While height and LAI are decreased properly and the plant shape is optimized through drip paclobutrazol（PP333）follow water measures in growth stages, single boll weight is not decreased but boll number per plant is increased. Yield is increased 2.4% ,5.5% and 30.6% compared with spraying DPC on leaf and deep tillage and conventional flood irrigation respectively, lint button percent comes to 44.70%. So the yield effect of drip paclobutrazol （PP333）follow water is superior to spraying DPC on leaf, but they have mutual complementary quality effect.