摘要
基于GIS和PSR(压力—状态—响应)框架,以宁夏19个县市为基本研究单元,通过构建耕地利用集约度模型、PSR系统协调度模型、耕地利用集约度变化模型和耕地集约利用驱动力模型,分析了1996—2012年宁夏耕地集约利用的时空格局及其驱动机制。结果显示:11996年以来,宁夏耕地利用集约度整体呈现上升趋势,PSR系统协调度呈现波动上升后趋于稳定态势;2宁夏耕地利用集约度空间差异显著,具有明显的空间集聚特征,基本形成"北高南低"的空间分布格局;3耕地集约利用水平下降的县市主要位于北部引黄灌区,而中部干旱带和南部黄土丘陵沟壑区的县市耕地集约利用水平则显著提升;4耕地质量和农业财政支出是影响耕地利用集约度的首要正向驱动力,社会经济发展水平、农业政策环境及科技水平因子对区域耕地利用集约度具有显著影响;5根据耕地利用集约度指数值及其变化特征,可将研究区划分为四大耕地利用类型区。
Based on GIS and PSR （pressure-state-response） framework, taking the 19 counties in Ningxia as the study area, by building the model of the intensive use of cultivated land, coordination of PSR system, the model of change of the intensive use of cultivated land and the driving force model of the intensive use of cultivated land, We analyze the spatial and temporal pattern of the intensive use of cultivated land and its driving mechanism from 1996 to 2012 in Ningxia. The results show that, since 1996, the intensive use of cultivated land in Ningxia has been on the rise and the coordination of PSR system first rises with fluctuations and then remains stable; the intensive use of cultivated land is significantly different between regions and the spatial distribution is lower in the south on the whole; the intensive use of cultivated land of counties located in North Yellow River irrigation shows a trend of decline, and counties in central arid zone and south loess hilly-gully region show a significant upward trend; the primary positive driving forces of the intensive use of cultivated land are land quality and agricultural fiscal expenditure, in addition, economic and social factor, policy environment and the level of science and technology have a notable impact on it; according to the index of cultivated land intensive use and its change characteristics, the whole region can be divided into four different types.
出处
《经济地理》
CSSCI
北大核心
2015年第9期172-181,共10页
Economic Geography
基金
国家自然科学基金项目(41161020)
宁夏大学研究生创新项目(GIP2015001)
关键词
耕地资源
利用集约度
时空格局
驱动因子
宁夏
cultivated land resources
land use intensity
spatial and temporal pattern
driving factors
Ningxia
