摘要:通过对轻度和中度盐渍化棉田整个生育期土壤水分、盐分含量的动态监测，分析了膜下滴灌棉田土壤水、盐动态变化及其相互作用的关系。结果表明：整个生育期中度盐渍化棉田土壤水分含量要高于轻度盐渍化棉田，土壤水分含量变化规律和土壤盐分含量变化规律相似，均表现出生育前期下降、中期稳定、后期略微增加的趋势；膜下滴灌能够在滴水过程中明显降低土壤中表层0～40 cm盐分含量，下层40～80 cm土壤为盐分聚集区域；以0～20 cm土壤盐 分含量模拟0～40、0～60、0～80、40～80 cm土壤盐分含量，幂函数和线性函数模拟结果较好，模拟0～40、0～60 cm的盐分含量结果达极显著相关，0～80 cm的模拟结果达到显著相关，模拟40～80 cm的土壤盐分变化结果不显著。

关键词:棉花  膜下滴灌  水分  盐分

AbstractThe dynamic changes of soil water and salt content and their interaction relationship were analyzed throughout the whole growing period of cotton under mulched drip irrigation in the fields with moderate and mild salinity. The results showed that the soil water content in the field with moderate salinity was higher than that in the field with mild salinity during the whole growth period of cotton. The change trend of soil moisture content was similar to that of soil salt content, being declined in the early growth stage, stable in the medium stage and increased slightly in the late stage. Dripping process significantly reduced the salt content in 0～40 cm soil layer, but the 40～80 cm soil layer was the salt gathering zone. The power and linear functions were suitable for imulating the salt in 0～40 cm, 0～60 cm, 0～80 cm and 40～80 cm soil layers by using the salt content in 0～20 cm soil layer, in which the R² was extremely significant for 0～40 cm and 0～60 cm profiles and significant for 0～80 cm profile, but it was not significant for 40～80 cm profile.

Key wordscotton  mulched drip irrigation  water  salt

文章编号： 0258_7106 (2016) 01_0018_15 中图分类号： P618.41 文献标志码：A

投稿时间：2012-05-07修订日期：2012-11-14 改回日期：2015_07_11

基金项目

**通讯作者耿新霞， 女， 1979年生， 助理研究员， 成矿规律研究方向。 Email： gen gxinxia@cags.ac.cn