盐碱地棉花膜下滴灌土壤改良方法及适应性试验研究

Experimental Study on Soil Improvement Methods and Adaptability of Saline-alkali Soil under Mulched Drip Irrigation

通过盐碱集中区土壤盐分检测及监测,制定可行的水盐调控方案,采用黄腐酸作为化学改良剂改良膜下滴灌盐碱地,并对比分析棉花长势和产量。结果表明,随着灌水时间及灌水量的增加,土壤盐分呈现出先明显降低后局部上升的趋势;改良后,土壤pH值、易溶盐总量、SO24-、HCO3-、Mg2+、Cl-、Ca2+、K++Na+均呈明显降低趋势;试验区内棉花好、中、差3种长势类型条件下株高、棉桃数、茎粗、叶面积、产量等均优于试验区外。

Abstract： According to detection and monitoring of soil salinity, feasible water and salinity control program was formulated. Fulvic acid was taken as chemical modifier to modify saline alkali soil under mulched drip irrigation, and cotton growing and production were analyzed. The results showed that：with the increase of irrigation time and irrigation volume, soil salinity first decreased significantly, then locally rose;