石漠化小流域植被演替阶段土壤容重与水分的变化特征  

The Variation of Soil Bulk Density and Moisture on Vegetation Succession Stage of Small Watershed in Rocky Desertification

作　　者：杜波[1] 唐丽霞[1] 潘佑静 杨智 高蜻 韩文君[1] 

机构地区：[1]贵州大学林学院,贵州贵阳550025 [2]贵州省水土保持技术咨询研究中心,贵州贵阳550002

出　　处：《贵州大学学报（自然科学版）》2016年第1期31-34,共4页Journal of Guizhou University:Natural Sciences

基　　金：贵州省水利厅科研项目(KT201312;KT201311)

摘　　要：运用空间代替时间法．对关岭石漠化区小流域裸地、草地、灌木林、乔木林和顶级群落5个植被演替阶段下土壤进行分析，探究0～20cm、20～40cm、40—60cm三个层次下土壤容重、土壤自然含水率和土壤饱和含水率的变化特征。结果表明：演替过程中，灌乔阶段土壤容重显著降低，而这种降低是从浅土壤层（0～40cm）开始向更深层（40～60cm）土壤进行的；土壤自然含水率和饱和含水率显著地提高。随着演替等级的升高，不同土层间水分含量发生变化，水分含量最高的土层开始从深层向浅层转移．浅层土壤的保水能力随着演替进行开始增强．而深层土壤保水能力相对减弱。using the method of space instead of time, analyzing the soil of hve vegetation succession stage on Dare land, grassland, shrubbery, arbor and top communities in Guanling rocky desertification area, and exploring the variation of soil bulk density, natural moisture and saturated moisture under the three levels of 0- 20cm, 20 ~ 40cm,40 ~ 60cm.Results show ：The succession process, soft hulk density is decreased significantly on the stage of arbor and shrub, and the change from the shallow soil layer （0- 40cm） begins to the deeper （40- 60cm） ; Natural soil moisture content and saturation moisture content significantly improved. With the increase of level of succession, different soil moisture content changes, the highest shallow, shallow soil water retention with the succession begins relatively less. soil moisture content began to shift from deep to to increase, while the deeper soil water retention is

关 键 词：石漠化 植被演替 土壤容重 土壤含水率 

分 类 号：S152[农业科学—土壤学]