膜下滴灌棉田土壤水盐运移规律研究

Water and Salt Transport of Cotton Field under Film Drip Irrigation

基于田问试验，分析了不同滴灌年限下棉田土壤水盐变化。结果表明，土壤水分与盐分负相关，滴灌对土壤盐分有淋洗作用，且随着滴灌年限的延长，对土壤盐分淋洗作用减弱。滴灌1a对土壤盐分淋洗作用明显，尤其是对上层土壤（0-40cm）盐分的淋洗作用更明显。

Field experiments were conducted to analyze the changes of soil water content and soil salt con- tent of cotton field in different drip irrigation times. The results showed that the soil salt content and soil water content had a negative correlation, and drip irrigation could leak salt. With the extension of drip irri- gation time, the effect of drip irrigation on leaking salt was reduced. Drip irrigation for 1 year had a signifi- cant effect on the leaking of soil salt, especially in 0-40 cm soil.