膜下滴灌对不同程度盐荒地改良的研究

The Research of Drip Irrigation under Plastic Film on Improving Salt Wasteland of Different Degrees

根据石河子垦区连续5a的监测试验,研究膜下滴灌技术对盐荒地的改良。结果表明,膜下滴灌技术可有效降低盐荒地耕作层土壤含盐量,土壤含盐量随灌溉水量增大而减小;连续5a运用膜下滴灌技术后,棉花出苗率达到80%以上,籽棉产量5 250kg/hm2以上,地下水埋深平均下降1.2m,同时地下水矿化度有所增加。膜下滴灌技术在改良盐碱地的应用中效果良好。

According to 5 years continuous monitoring experiments in Shihezi reclamation area, improvement of salt wasteland using drip irrigation technology was studied. The results indicated that drip irrigation under film could effectively reduce soil salinity of salt wasteland arable layer, and soil salinity decreased with the increase of irrigation amount. Cotton germination rate was above 80%, seed cotton yield was over 5 250 kg/hmz, buried depth of groundwater dropped by 1.2 m, and groundwater salinity increased under drip irrigation for 5 years. Drip irrigation under film could be applied to improve saline-alkali soil.