咸淡水滴灌对棉花产量和品质的影响

Influence Irrigation by Salt-water of and Fresh-water on Cotton Yield and Fiber Quality

【目的】研究微咸水、淡水交替滴灌对棉花产量及产量构成因素的影响,探讨微咸水灌溉对棉花产量和品质的影响。【方法】进行不同灌溉量的微咸水和淡水交替滴灌试验。【结果】在新疆南疆地区利用3 g/L矿化度的微咸水和淡水交替灌溉,可以提高棉花产量,且棉纤维品质优良,由微咸水灌溉带入土体的盐分通过淡水轮灌和冬灌,土体总盐分保持平衡。【结论】通过对棉花各生育期检测指标分析得出微咸水2 250和淡水1500 m3/hm2轮灌棉花产量较高,不同的咸淡水滴灌对棉花纤维品质没有显著性的影响。

【Objective】In order to discuss the effect of gentle salt-water irrigation on yield of cotton and its quality,a field experiment was conducted at the national irrigation experiment station of Kuerle city in 2008.The research has studied the effect of gentle salt-water alternated with fresh-water irrigation on cotton yield and yield component.【Method】This experiment was carried out to use different gentle salt-water rate and different fresh-water rate to find out an appropriate amount of irrigation.【Result】The results showed that the cotton yield and its fiber quality can be improved by gentle salt-water alternated with fresh-water irrigation of 3 g/L of mineralized degree in the south Xinjiang.Salt which was carried into soil could be rush into a deep layer of the soil profile by fresh-water irrigation and winter irrigation,and the total salinity of the soil generally kept its balance.【Conclusion】By analyzing the tested index of every cotton growth stage,it was found out when gentle salt-water irrigation rate was 2 250 m3/hm2 and the fresh-water irrigation rate was 1 500 m3/hm2,cotton yield was higher.