我国北方沙区退化植被的恢复机理

摘要/Abstract

摘要： 通过讨论我国北方沙区退化植被的恢复机理,认为气候驱动机制、植被自我修复机制、土壤环境变化和景观格局的驱动机制是我国北方沙区退化植被自然恢复的四个主要机制。其中，气候机制决定着植被恢复演替的方向和终点，是植被恢复的外在驱动机制；植被的自我修复机制决定着植物恢复的起始速度和演替速度，是植被恢复的内在驱动机制；而景观驱动作用只发生于斑块较小且呈镶嵌分布的退化植被区，对于面积很大且连片分布的流沙裸地其作用微弱；土壤条件的改善既是植被对土壤作用的结果，又反馈于植被的演替，它决定着群落演替的阶段性和群落类型，自始自终伴随着植被的演替过程。

关键词: 中国北方沙区, 退化, 植被, 恢复, 机理

Abstract: Authors have discussed the restoration mechanisms of degraded vegetation in the sandy areas of northern China. The four main mechanisms to drive vegetation naturally restoring are climatic driving, self restoring of vegetation, soil environment improvement and landscape structure. The climate mechanism decides the direction and end-point of vegetation restoring succession, and is an exterior mechanism. Self restoring mechanism of degraded vegetation decides starting speed and succession speed of vegetation restoration, and is an intrinsic mechanism. Landscape action is just responsible for smaller and inlaid spots of degraded vegetation, and its effect on moving sandy land and bare land with great areas is lower. Improvement of soil environment is result from vegetation effect on soil as well as feedback effect on vegetation, which decides stages of vegetation succession and community types, and accompanied by vegetation succession processes all long.

Key words: sandy areas, degradation, vegetation, restoring, mechanism

中图分类号:

Q948.154

赵哈林;苏永中;周瑞莲. 我国北方沙区退化植被的恢复机理[J]. 中国沙漠, 2006, 26(3): 323-328.

ZHAO Ha-lin;SU Yong-zhong;ZHOU Rui-lian. Restoration Mechanism of Degraded Vegetation in Sandy Areas of Northern China[J]. JOURNAL OF DESERT RESEARCH, 2006, 26(3): 323-328.

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