微咸水灌溉对河北低平原区土壤盐分及棉花的影响

Effect of Saline Water Irrigation on Soil Salt and Cotton in Hebei Low Plain

基于田间小区试验,研究了河北低平原区的2个试验站进行2g/L咸淡混合水灌溉后,对土壤盐分动态和棉花产量和品质的影响。结果表明,2g/L混合水灌溉的土壤剖面盐分比淡水灌溉总体普遍增加,但增加的幅度没有超过棉花的耐盐阈值,且含盐量能保持年际间平衡。2g/L咸淡混合水灌溉对棉花的产量和品质没有影响。在河北低平原有咸水区内,2g/L混合水灌溉棉花是安全可行的。

Field experiments were conducted to investigate the effects of border irrigation with 2 g/L saline-fresh blending water on soil salt dynamic and cotton yield and quality in 2 experimental stations in Hebei low plain.The results showed that there were not significant differences between the irrigation of fresh water and 2 g/L saline water on cotton yield and quality.The salt content in soil profiles under saline water irrigation was higher compared with fresh water irrigation,but it didn＇t exceed cotton threshold of salt resistance and could be maintained banlance among different precipitation years in 2 experimental stations.So in Hebei low plain,the irrigation of 2 g/L saline-fresh blending water on cotton is safe and feasible.