Peng Jian, Wang Yanglin, Wu Jiansheng, Chang Qing, Zhang Yuan
Center of Digital City and Urban Landscape, Shenzhen Graduate School, Peking University, Shenzhen 518055, China.
Environ Monit Assess. 2007 Oct;133(1-3):407-15. doi: 10.1007/s10661-006-9595-9. Epub 2007 Feb 8.
As an important component of sustainable development in mountain areas, evaluation for sustainable land use is always one of the hotpots of researches on sustainable development. Traditional evaluation for sustainable land use mainly focuses on the sustainability of land use model and biological production on temporal scale, and overlooks the effects of land use patterns on the sustainability, while landscape ecology can be a good help to realize the spatial analysis of sustainable land use. In this study, a synthetic evaluation indexes system for sustainable land use was constructed through the application of landscape metrics. Taking Yongsheng County of Yunnan Province, China as a case study, a series of quantitative evaluation were conducted in 1996, 1999 and 2001, to monitor the temporal dynamics of regional land use sustainability. Two indicators, contributing amount of indexes, and obstacle amount of indexes, were also set up to ascertain the significance of all the evaluation indexes to the evaluation results. The results showed that, in the study phases, the land use sustainability of the whole county had been low with a stable but great spatial difference, and great changes took place in regional land use system in 1999 with the deviation from the aim of sustainable land use. It also showed that, the most important indexes contributing for the land use sustainability in the study period, were the indexes of population density and land use degree, followed by the index of landscape diversity and cropping index. And the most important indexes counteracting the land use sustainability were the indexes of per unit area total production value of industry and agriculture, per unit area yield of cereal crops, landscape fragmentation, followed by the indexes of per unit area yield of economic crops and fertilizer consume per unit area.
作为山区可持续发展的重要组成部分，土地可持续利用评价一直是可持续发展研究的热点之一。传统的土地可持续利用评价主要侧重于土地利用模式在时间尺度上的可持续性以及生物生产，而忽视了土地利用格局对可持续性的影响，而景观生态学有助于实现土地可持续利用的空间分析。本研究通过应用景观指标构建了土地可持续利用综合评价指标体系。以中国云南省永胜县为例，于1996年、1999年和2001年进行了一系列定量评价，以监测区域土地利用可持续性的时间动态。还设置了指标贡献量和指标障碍量两个指标，以确定所有评价指标对评价结果的重要性。结果表明，在研究阶段，全县土地利用可持续性较低，空间差异稳定但较大，1999年区域土地利用系统发生了较大变化，偏离了土地可持续利用目标。研究还表明，研究期内对土地利用可持续性贡献最大的指标是人口密度和土地利用程度指标，其次是景观多样性和种植指数指标。而对土地利用可持续性起阻碍作用最重要的指标是工农业单位面积总产值、粮食作物单位面积产量、景观破碎化指标，其次是经济作物单位面积产量和单位面积化肥施用量指标。
