The Influences of Different Irrigation Water on Spatial Distribution of Cotton Bolls and Yields

Abstract

Takeing the jujube orchard intercropping cotton as experimental material In southern Xinjiang to study the influences of different irrigation water on spatial distribution of cotton bolls and yields. Setting the moderate water stress W1 (250 m3/667m2), mild water stress W2(300 m3/667m2), the appropriate moisture W3(350 m3/667m2), the sufficient water supply W4(400 m3/667m2), in total four different irrigation water processing. The results show that : (1) The cotton boll’ shedding rate in different water processing in order W4 > W1 > W3 > W2,the shedding rate of upper and lower is much higher than the middle fruit spur.(2)the effective boll of cotton are mainly in the middle part. (3)The total boll weight of cotton middle fruit spur greater than the total boll weight of fruit spur in the upper and lower. And the lower part’ weight is slightly higher than the upper.(4) The boll weight of upper fruit spur have bigger fluctuations than the lower,each part of the cotton boll weight as W2 > W3 > W4 > W1. (5) Four water treatment have a little effect on lint percent, seed cotton and ginned cotton showed the same trend as W2 > W3 > W4 > W1. Comprehensive consideration in many aspects, the drop irrigation amount 300-350m3/667m2 could as the reference standard of this locality jujube orchard intercropping.