黔西北植被自然恢复演替过程中土壤环境变化  

The Changes of Soil Environment during Natural Vegetation Restoration in Northwest Guizhou

作　　者：陈坤浩[1] 谢永贵 沈有信[3] 余刚国 

机构地区：[1]毕节学院环境与生命科学系,贵州毕节551700 [2]毕节地区林业科学研究所,贵州毕节551700 [3]中国科学院西双版纳热带植物园,云南昆明650223

出　　处：《毕节学院学报（综合版）》2009年第8期83-86,共4页Journal of Bijie University

基　　金：国家科技支撑计划;项目编号:2007BAD53B00

摘　　要：以空间代替时间方法研究了黔西北喀斯特地区植被自然恢复演替过程中草本群落阶段、藤刺灌丛阶段、灌乔林阶段、次生乔林阶段和顶级群落阶段的土壤环境,结果表明:随着演替的进行,0～20 cm土层土壤容重逐渐下降,到顶级群落阶段仅为0.9492 g/cm^3;20～40 cm及40～100 cm土层土壤容重逐渐升高,但0～100cm土层平均容重逐渐降低;0～20cm土层含水量逐渐升高,顶级群落阶段明显高于其它阶段;20～40cm及40～100cm土层含水量随植被恢复演替呈总体下降趋势。The soil environment of the grass （G） stage, liana and thorny shrub （LS） stage, the shrub and young tree （ST） stage, the secondary forest （SF） and the latter forest （LF） stage in the process of the natural vegetation restoration in Guizhou＇s northwest Karst area were studied. The results showed that the soil bulk density of 0-20 cm soil layer declined gradually, only being 0.9492 g/cm^3 in the latter forest （LF） stage. The soil bulk density of 0-40 cm and 40-100 cm soil layer gradually increased, but the average bulk density of 0- 100cm gradually declined. The water content of the 0-20 cm soil gradually increased. And the latter forest （LF） stage was significantly higher than other stages. There is a downward trend for the water content of the 20-40 cm and 40- 100 cm soil with the succession of vegetation restoration.

关 键 词：黔西北 喀斯特 自然演替 土壤容重 土壤水分 

分 类 号：S158.1[农业科学—土壤学]