松嫩平原盐碱化草地治理方法的比较研究

Comparative study on remedy ways of saline alkali grassland in Songnen Plain.

采用生物、化学和物理方法对盐碱化草地治理进行了比较研究．生物方法采用枯草处理；化学方法采用石膏处理；物理方法采用铺沙处理，种植羊草、野大麦和碱茅３种牧草．结果表明，３种方法均能降低土壤ｐＨ值、电导率和增加土壤含水率．在生物治理中，羊草和野大麦在枯草量达１５００ｇ·ｍ－２，碱茅在枯草量达１０００ｇ·ｍ－２时，便可良好生长．在化学治理中，石膏施用量达１．２５ｋｇ·ｍ－２，即可达到改良效果．在物理方法治理中，羊草和野大麦在沙层厚度为１３ｃｍ，碱茅在１１ｃｍ时即可正常生长发育．

This study was designed to compare the biological, chemical and physical remedies on saline alkali grassland. Three kinds of forage grass, Aneurolepidium chinense, Hordeum brevisubulatum and Puccinellia tenuiflora were planted in experimental sites, and soil was ameliorated with grass litter, gypsum amendment and sand bedding ,respectively. The result showed that all of the three ways decreased soil pH and electrical conductivity, and increased soil water content. In biological treatment. Aneurolepidium chinense and Hordeum brevisubulatum could grow well with 1.5kg·m -2 of litter, and Puccinellia tenuiflora with 1.0kg·m -2 of litter. Applying 1.25kg·m -2 of gypsum could produce an efficient effect. A. chinense and H. brevisubulatum could normally grow with 13cm thickness of sand bedding, and P.tenuiflora with 11cm.