苏打盐碱土结构性与持水特性的改良研究  

Study on Improving Structure and Water Holding Characteristics of Soda Alkali-saline Soil

作　　者：王宇[1] 韩兴[1] 赵兰坡[1] 马晶[2] 

机构地区：[1]吉林农业大学资源与环境学院,长春130118 [2]南京农业大学资源与环境科学学院,南京210095

出　　处：《吉林农业大学学报》2006年第5期545-548,共4页Journal of Jilin Agricultural University

基　　金：吉林省重点科技招标项目(980201-04)

摘　　要：采用硫酸铝对吉林省西部苏打盐碱土进行了改良,对改良后土壤的结构性及持水特性进行了测定。结果表明,施用硫酸铝后苏打盐碱土的土壤结构性与持水特性均有显著改善,土壤团聚体(>0.005 mm)的数量显著增加。当硫酸铝用量达0.4%(质量分数)时,土壤容重由1.35 g/cm3降至1.16 g/cm3,孔隙度由49.1%增至56.2%。随着硫酸铝用量的增加,膨胀度增大,土壤渗透性和持水能力增强。This article emphatically discussed the improvement effect of aluminum sulfate on bad physical characteristics of soda alkali-saline soil. The result indicated that after the employment of aluminum sulfate, soil structure and water holding characteristics of soda alkali-saline soil remarkably improved and soil aggregate （ 〉 0.005 mm） remarkabld inereasd. When addition of aluminum sulfate reached 0.4%, bulk specific gravity varied from 1.35 g/cm^3 to 1.16 g/cm^3, porosity from 49.1% to 56.2%. With the increase of aluminum sulfate addition, degree of expansion increased, soil infiltration ability and water holding ability strengthened, which has created excellent soil environments for crop growth.

关 键 词：苏打盐碱土 硫酸铝 结构性 持水特性 

分 类 号：S156.4[农业科学—土壤学]