地块尺度土地可持续利用评价指标与方法探讨——以陕北安塞纸坊沟为例

THE INDICES AND METHOD APPROACH OF LAND SUS TAINABLE USE EVALUATION IN LAND PATCH SCALE ——Take the Zhifang gully in Ansai, Shaanxi province as example

本文以陕北安塞纸坊沟为例，阐述了地块的概念和在地块尺度基础上，研究土地可持续利用的意义。从农业技术因子出发，在地块尺度上评价土地可持续利用发展，强调了人类认识程度、利用因素以及农业技术因子的重要性。从生态的角度，评价地块的土地自然适宜性，与土地利用现状结合评价土地的人为利用适宜性。从生态和经济效益评价两方面进行地块尺度土地可持续性发展评价。

Land sustainable use has become one of important environment issues in the world, especially on the Loess Plateau, China. Taking the Zhifang gully which lies in the north part of Shaanxi province, the typical hilly gully loess region as example, this paper described the conception of land patch, expressed the significance of study land sustainable use in land patch scale. From the dominant factor namely agricultural technology view, human knowledge, utility and agricultural technical factors were emphasized. A series of factors reflecting the soil fertility, topological condition, degree of soil erosion and limitation of land use was selected, and based on that land abiotic suitability was evaluated. The result of land use suitability was obtained compared with the current land use. Combined with economical evaluation, land sustainability was developed. A model of land sustainable use evaluation in land patch scale was given at last.