干旱区生态环境知识资源中心(Arid): 岩溶生态系统土壤及表生植被某些特性变异与石漠化的相关性

Arid

	岩溶生态系统土壤及表生植被某些特性变异与石漠化的相关性
其他题名	Correlation between rock desertification and variatioins of soil and surface vegetation in karst Eco-System
	李阳兵 1; 谢德体 2; 魏朝富 2
来源期刊	土壤学报
ISSN	0564-3929
出版年	2004
卷号	41 期号:2 页码:196-202
中文摘要	岩溶山地石漠化是一种与脆弱生态地质背景和人类活动相关联的土地退化过程。本文以重庆市典型岩溶山地为例，探讨了岩溶生态系统土地利用方式与土壤机械组成、土壤水稳性团聚体、土壤有机质、土壤种子库、植被类型的关系。结果表明，经开垦利用后，岩溶环境土壤表层砂化现象更加明显。土地利用强度越大，对土壤团粒结构的破坏也越大，林地、灌草坡对水分的保持能力强，土地利用强度较大的土壤保水能力相对较弱，土壤有机质受土地利用强度的明显影响。土地利用强度越大，木本植物种子越少，草本植物种子越多，且以农田杂草为主。土地利用方式的变化(如陡坡开垦)是对次生植被及其种子库的主要威胁。
英文摘要	The rock desertification in karst mountains is a kind of land degradation processes correlated with vulnerable eco-geology background and human activities. This paper chooses the typical karst mountains in Chongqing as an example to dis cuss the impact of different land use patterns on mechanical composition of soil, water-stable aggregates, soil organic matter, the compositions of soil seed banks and bio-diversity of karst eco-system. The results show that the surface soil layer sandification is more evident after the reclamation, the more intensive land utilization, the more serious the destruction on soil aggregate struc ture . The soils of woodland and grassland systems have not only a superior soil water retention property but also a soil water-sup plying capacity than the soils with intense land utilization, and the soil organic matter is impressed by land using intensity dis tinctly . The amount of seeds of xylophyta species decreases with the increase in strength of land use, while the amount of seeds of herbaceous species increase, and most are farmland weeds. The changes of land use patterns have the dominant influence on secondary vegetation and their soil seed banks.
中文关键词	岩溶山地
英文关键词	Karst mountain areas
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ASTRONOMY ASTROPHYSICS
WOS研究方向	Astronomy & Astrophysics
CSCD记录号	CSCD:1636155
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205550
作者单位	1.中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 贵州 550002, 中国; 2.西南农业大学资源环境学院, 重庆 400716, 中国
推荐引用方式 GB/T 7714	李阳兵,谢德体,魏朝富. 岩溶生态系统土壤及表生植被某些特性变异与石漠化的相关性[J],2004,41(2):196-202.
APA	李阳兵,谢德体,&魏朝富.(2004).岩溶生态系统土壤及表生植被某些特性变异与石漠化的相关性.土壤学报,41(2),196-202.
MLA	李阳兵,et al."岩溶生态系统土壤及表生植被某些特性变异与石漠化的相关性".土壤学报 41.2(2004):196-202.