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我国植被水土保持功能研究进展
引用本文:韦红波,李锐,杨勤科.我国植被水土保持功能研究进展[J].植物生态学报,2002,26(4):489-0.
作者姓名:韦红波  李锐  杨勤科
作者单位:中国科学院,水利部水土保持研究所,陕西杨陵,712100
基金项目:中国科学院资源环境重点项目 (KZ95 2_S1_2 34),中国科学院知识创新项目 ( 990 10 5 ),西北农林科技大学青年专项基金
摘    要: 我国植被水土保持功能的研究可以概括为以下3个主要方面:1)植被水土保持功能的对比研究: 通过实地对比观测植被覆盖地与对照地(裸地、农耕地等)的径流量、土壤侵蚀量等,研究植被的减水减沙效益。研究表明,天然植被具有强大的水土保持功能,并呈现出林>灌>草的规律;人工植被水土保持功能的发挥则受到多种因素的影响,呈现出较复杂的情况。2)植被保持水土的机理研究:雨滴击溅和径流冲刷是水土流失的动力,通过分析植被削减降雨和径流动能的过程,来揭示植被水土保持功能的内在机理。研究表明,植被外在的水土保持功能是其内部各个垂直层

关 键 词:植被  水土保持  中国
修稿时间:2001年4月24日

RESEARCH ADVANCES OF VEGETATION EFFECT ON SOIL AND WATER CONSERVATION IN CHINA
WEI Hong_Bo,LI Rui and YANG Qin_Ke.RESEARCH ADVANCES OF VEGETATION EFFECT ON SOIL AND WATER CONSERVATION IN CHINA[J].Acta Phytoecologica Sinica,2002,26(4):489-0.
Authors:WEI Hong_Bo  LI Rui and YANG Qin_Ke
Abstract:Research on the effect of vegetation on soil and water conservation in China can be divided into three main aspects. The first is the research of contrast, which is the research of vegetation benefits on blocking runoff and sediment by contrasting field observation data of runoff and soil erosion in vegetation cover land with those of bare land or farmland. The results showed that natural vegetation has a remarkable effect on soil and water conservation and this effect increases from the natural grassland to shrubbery and forest. The situation is more complicated for artificial vegetation, whose effect on soil and water conservation is influenced by many factors. The second is research of mechanism. Raindrop strike and runoff scour is the power of soil and water loss. Analyzing the energy reduction process of rainfall and runoff throughout the vegetation layers, the researchers discovered the internal mechanism of vegetation effect on soil and water conservation. The research showed that the external effect of vegetation on soil and water conservation is a combined effect of rainfall interception and runoff blockage by different vertical layers of vegetation so as to reduce the erosive energy of raindrop strike and runoff scour. All the vertical layers of vegetation are important to soil and water conservation. The third is research of evaluation. In order to evaluate vegetation effect on soil and water conservation, the evaluation index is firstly put forward, then quantitative relationships between evaluation index and runoff as well as soil erosion are analyzed. For a long time, this evaluation research in China focused on the single evaluation index, vegetation cover (for forest, it is forest cover ratio). With the development of mechanism research, many scholars put forward different evaluation index systems to comprehensively evaluate vegetation effect on soil and water conservation. The single index proved unable to completely reflect the difference of effects of different vegetation on soil and water conservation. The new comprehensive evaluation index systems need to be developed and validated, and are currently unable to be applied in practice.
Keywords:Vegetation  Soil and water conservation  China
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