不同灌水量对棉铃空间分布及产量的影响

The Influences of Irrigation Quantity on Spatial Distribution of Cotton Bolls and Yield

以南疆枣园间作棉花为试验材料，研究不同灌水量棉铃空间分布及产量的影响。设置中度水分胁迫W1（250m^3／667m^2）、轻度水分胁迫W2（300m^3／667m^2）、适宜水分W3（350m^3／667m^2）、充分供水W4（400m^3／667m^2）4个不同的灌水量处理。结果表明：不同水分处理条件下，单株棉花棉铃脱落率依次为W4〉w1〉w3〉w2，上部和下部果枝棉铃的脱落率远远高于中部果枝；棉株的有效铃主要集中于中部；棉株中部果枝的总铃质量大于上部和下部的果枝总铃质量，而下部果枝铃质量稍高于上部；上部果枝较下部果枝铃质量波动稍大，各部分棉铃质量依次为W2〉W3〉W4〉W1；4个水分处理对棉花衣分的影响不大，单株籽棉和皮棉质量表现出w2〉W3〉W4〉W1的趋势。综合多方面考虑，灌水量300～350^3／667m^2可以作为本地枣园间作的参考标准。

The influences of irrigation quantity on spatial distribution of cotton bolls and yield were studied with the jujube orchard intercropping cotton as experimental material in southern Xinjiang. Four different irrigation treatments were set up, including the moderate water stress W1（250 m3/667 m2）,mild water stress W2（300 m3/667 m2）,the appropriate moisture W3（350 m3/667 m2）,the suffi- cient water supply W4（400 m3/667 m2）. The results showed that：the cotton boll shedding rate in dif- ferent treatments was in order of W4〉W1〉W3〉W2, the shedding rate of upper and lower spur was much higher than the middle fruit spur;the effective bolls of cotton were mainly in the middle part;the total boll mass of cotton middle fruit spur was greater than that of the upper and lower fruit spur. The boll mass of lower part was slightly higher than that of the upper part; the boll mass of upper fruit spur had bigger fluctuations than that of the lower spur, the cotton boll mass in same position was in order of W2〉W3〉W4〉W1 ;four water treatments had a small effect on lint percent;seed cotton and ginned cotton showed the same trend as W2〉W3〉W4〉W1. As a comprehensive consideration, drop irrigation amount of 300 m3/667 m2-350 ma/667 m2 could be the recommend standard for jujube or- chard intercropping production in the area.