摘要
土地荒漠化是在人和自然因素的综合作用下 ,地表环境退化的总过程 ,其实质是土地减弱或丧失生长绿色植物的能力。因此 ,植被因子是评价土地荒漠化的关键因子。植被盖度和生物量能很好地反映土地是否荒漠化和荒漠化的强弱程度 ,但靠常规方法要获得这两项指标非常困难。以元谋老城乡为试验区 ,对土地荒漠化与植被盖度和生物量的关系、利用遥感技术获取的植被指数与植被盖度和生物量的关系进行了分析研究。试验研究表明 ,植被指数与盖度和生物量具有很高的相关性 ,是对二者的综合反映 ;
Land desertification is the result of integration impacts of man and nature on the earth's surface degradation The substance of land desertification is that the ability is weakened or lost which plants grow on the land Vegetation is the key factor of evaluation to land desertification Vegetation cover rate and biomass can reflect whether land is desertificated It is difficult vegetation cover rate and biomass is got by normal method In Yuanmou arid-hot valley of Jinshajiang River, the relation between vegetation cover rate and land desertification, biomass and land desertification, vegetation cover rate and vegetation index, biomass and vegetation index from remote sensing image, is discussed for evaluation to land desertification The results show that vegetation index reflects integratively vegetation cover rate and biomass, vegetation index are applicable to evaluation of land desertification
出处
《云南地理环境研究》
2002年第1期80-84,共5页
Yunnan Geographic Environment Research
基金
中国科学院山地环境学"百人计划" (1 999年度 )资助项目的部分研究成果
