摘要：试验采用了灌水和施用改良剂相结合的方法对重度盐渍化土壤进行改良。试验采用2因素3水平组合设计，3个灌水量，3个改良剂施用量，12个处理，3次重复。结果表明：灌水量525m3/hm2土壤全盐量由1.72%降至0.48%～0.64%、灌水量750m3/hm2土壤全盐量降至 0.4%～0.6%。改良剂不同施用量与对照相比，土壤ESP下降幅度为2.83%～26.44%；土壤HCO3-下降幅度9.13%～43.47%；土壤Cl-下降幅度19.6%～29.9%；土壤SO42-增加幅度10.36%～58.22%；土壤Ca2+增加幅度0.68%～62.24%。灌水量750m3/hm2洗盐效果明显，改良剂施用量4500kg/km2防碱效果明显。但从节水和土壤盐分积累分析，灌水量525 m3/hm2、改良剂施用量3000 kg/km2为宜。

Abstract: Irrigation of alkaline freshwater and application of amendment were used to improve the soil. The experiment was conducted with two factors (irrigation amount and amendment application rate) and three levels combination design with three replications. The soil salt content deceased from 1.72% to 0.48%～0.64% and 0.4%～0.6% when irrigated by 525m3/hm2 and 750m3/hm2, respectively. Compared with the control treatment, application of amendment reduced 2.83%～26.44% of soil ESP, 9.13%～43.47 of soil HCO3- and 19.6%～29.9% of soil Cl-. and increased 10.36%～58.22% of soil SO42- 0.68%～62.24% of soil Ca2+. Irrigation with 750m3/hm2 water has significant effect on desalting, application of amendment at 3000 kg/km2 has significant effect on preventing alkalization. Comprehensive considering water usage and soil salt accumulation, irrigation with 525 m3/hm2 water and application of amendment at 3000 kg/km2 was recommended.