不同生态系统黑土的孔隙状况和持水性能

Study on soil porosity and water-holding capability of black soil in different types of eco-system

黑土水土流失日益严重,解决水土流失问题已迫在眉睫.而水土流失的程度受到土壤孔隙度和持水性能的影响.文章通过对裸地、草地、农田和林地等4种不同生态系统内不同深度土壤的容重、孔隙度及持水量进行了方差分析及比较.结果表明,草地、农田和林地土壤的容重均小于裸地,其容重大小依次为草地<农田<林地<裸地;孔隙度大小依次为草地>农田>林地>裸地;在土壤持水性能方面,草地优于其他生态系统,其大小依次为草地>农田>林地>裸地.

Black soil erosion was becoming increasingly serious and should be immediately settled down.The extent of soil erosion was impacted by soil porosity and water-holding capability.The soil porosity and water-holding capability of bald land,grass land,cultivated land and forest land in different depth were analyzed and compared statistically.The results indicated that the bulk density of grass land,cultivated land and forest land was lower than that of bald land,and was arranged according to size as follows： grass landcultivated landforest landbald land.The soil porosity was arranged according to size as follows：grass landcultivated landforest landbald land.The water-holding capability of grass land was superior to other systems,and was arranged according to size as follows：grass landcultivated landforest landbald land.