生物、化学改良对重度盐碱化草地土壤水分特性影响的比较研究  

The comparison of the effect on the water propertles of alkaline-saline grassland between biological and chemical amel iorates

作　　者：陈志鸿[1] 胡勇军[1] 郭继勋[1] 

机构地区：[1]东北师范大学草地研究所,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2002年第3期92-97,共6页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家重点基础研究发展规划项目 (G2 0 0 0 1 86 0 6 )

摘　　要：较为系统地研究了生物、化学改良对重度盐碱化土壤的基本物理性质、持水特性及供水状况的影响 .结果表明 :经生物、化学两种方式改良后 ,耕层土壤的基本物理性质和水分行为发生了明显的变化 .经生物、化学改良后 ,0～ 2 0cm土层土壤微结构中大粒级颗粒含量增加 ,小粒级颗粒含量减少 ,土壤比表面值降低 ;土壤持水力降低 ,但有效水含量和比水容量增加 ,土壤供水能力增强 .化学改良效果要好于生物改良 .The effect of biological and chemical ameliorations on the physical characters,water-retention characters and water-supply condition of the alkaline-saline soil was studied in this paper.The results were as follows:by biological and chemical ameliorations,the physical characters and water-retention characters of cultivated soil changed drastically.As well,in the soil's (0～20 cm)coacervate constitution,the large soil types concent increased,the little soil types concent decreased and the specific surface drooped;furthermore,the water-redention capacities of soil drooped,but the available water content and the specific water capacities(SWC)increased,the water-supply ability strengthened.The chemial ameliorates were mucheffectively than the bidogical ameliorates.

关 键 词：化学改良 重度盐碱化土壤 持水特性 比水容量 比表面 生物改良 松嫩草原 草原土壤 

分 类 号：S812.2[农业科学—草业科学]