改良剂组合对盐碱土的改良效果研究

Study on Improvement Effect of Modifier Composition on Saline-alkali Soil

[目的]从所选取的5种物质(石膏、粉煤灰、油脂素、沸石粒、钾粒)中筛选对盐碱土改良效果最好的改良剂及其最佳组合方式。[方法]采取单一施用、两两施用,3种混施的方式将改良剂与土壤混合,通过盆栽试验对土壤进行一段时间的培养,检测各指标的变化。[结果]5种土壤改良剂及其组合对盐碱土的p H、部分肥力指标及水溶性离子含量均有一定程度的改良。对全磷和有效钾改良效果最好的是粉煤灰和油脂素组合施用;对p H、水溶性离子及其他肥力指标改良效果最好的是石膏、粉煤灰和油脂素3种改良物质混合施用。[结论]改良剂混合施用比单一施用效果好。

[Objective] The research aimed to filter the modifier combination which had the best improvement effect on saline soil from the selected five substances （gypsum,fly ash,fat hormone,zeolite tablets and potassium tablets）.[Method] A pot experiment was conducted in soil cultivation period.A single application and every two or three mixed fertilizer and soil improver way were administered to detect the change of each indexes.[Result] Five soil amendments and combinations of saline-alkali soil improved ion content,pH and water-soluble portion of fertility indicators with a certain degree.The best improved result for total phosphorus and available potassium was the combination of fly ash and fat hormone.And the best improved result for pH,soluble ions,and other indicators was the combination of gypsum,fly ash and grease prime.[Conclusion] Application effect of mixed improvers was better than that of a single one.