黔中喀斯特植被恢复演替过程中土壤理化性质研究  

A Study on Soil Physical and Chemical Properties in the Process of Vegetation Succession in Karst Area in Central Guizhou

作　　者：司彬[1,2,3] 姚小华[1] 任华东[1] 李生[1] 何丙辉[2] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400 [2]西南大学资源环境学院,重庆400716 [3]贵州省水城县委办公室,贵州水城553001

出　　处：《江西农业大学学报》2008年第6期1122-1125,共4页Acta Agriculturae Universitatis Jiangxiensis

基　　金：国家“十一五”科技支撑计划(2006BAD03A0303);国家林业重点工程科技支撑项目([2003]88-1)、(林计批字2006-3);科技部公益项目(2005DIB3J146)

摘　　要：黔中喀斯特地区石漠化后,植被恢复自然演替过程可分为草丛阶段、草灌阶段、藤刺灌丛阶段、次生乔林阶段和顶级群落阶段。以空间代替时间的方法研究各演替阶段土壤理化性质。结果表明:在黔中喀斯特植被恢复自然演替过程中,土壤容重逐渐降低,空隙度上升;土壤由弱碱性向弱酸性演替;土壤中速效养分、有机质、全氮和全磷含量均随演替进行而不断上升,速效氮、速效钾、全氮、全磷含量在次生乔林阶段达到最大;而全钾含量则随演替进行而不断下降。The process of natural succession of restoring vegetation in central Guizhou after rocky desertification in Karst area was divided into the herbosa stage, the stage of herbosa - shrub, the stage of vine - shrub, the stage of subahem tree forest and the climax stage. Soil physical and chemical properties were studied by spatial method instead of time method. The results showed that, in the process of vegetation succession in Karst area in central Guizhou, the bulk density of soil decreased gradually, and the soil porosity rose steadily. The soil transformed from acid to alkali. The content of virtual nutritions, OM, total N and total P rose gradually in the process of succession, and the content of virtual N, virtual P, total N and total P reached the most in the stage of subaltern tree forest. But the total K decreased gradually in the whole process of succession.

关 键 词：喀斯特植被 石漠化 植被恢复 土壤养分 黔中 

分 类 号：S714.2[农业科学—林学] S158.1