赣南红壤侵蚀地植被概况及其物种多样性的变化

在对赣南典型红壤侵蚀区自然恢复植被群落和人工植被群落调查的基础上，对其植被特征及其物种多样性进行分析研究，结果表明，严重侵蚀地植被的植物种类组成贫乏、群落结构单一、覆盖稀疏，是以中生或旱中生的多年生草本植物为主所组成的次生植被，属于灌草丛植被类型。植被恢复初级阶段群落以草本植物占优势，物种丰富度和物种多样性指数均低。随着恢复年限的增长，植被由单层次结构向复层次结构发展，物种多样性指数增高。

A Survey of Vegetation on the Eroded Red Soil in South Jiangxi and Changes in Its Species Diverity

On the basis of the research on natural and man-established vegetation communities on the eroded red soil in south Jiangxi,the characteristic and species diversity of those communities were analyzed. The results show that the communities of severely eroded red soil is a piece of secondary vegetation that mainly consists of mesic or xeric-mesic perennial herb, belonging to shrub-herb vegetation. The floristic composition of plant community is very simple and the stratification and structure are uniform with a low coverage. Herbs dominate in the primary stage of restoration. Both richness and diversity of species are fairly low at the beginning of the recovery stage. With time going by, the community structure changes from single-story to multi-story, the community species diversity and richness increase.