耕地压力时空演变分析——以青海河湟谷地为例

A Research on Space-Time Evolution of Cultivated Land Pressure——Taking Hehuang Valley in Qinghai Province as an Example

耕地压力指数是最小人均耕地面积与实际人均耕地面积的比值,粮食产量、粮食播种面积的比重是其重要影响因素。通过对青海河湟谷地2006-2012年耕地压力指数影响因素的分析,将其转化为能值后进一步分析区域内整体耕地压力指数,说明区域耕地压力指数随着农业产业结构调整而呈现的变化趋势,以及研究区内各县耕地压力指数存在着差异性。地区耕地压力指数的分析结果,对于区域未来土地利用规划具有重要指导作用。

The pressure index of cultivated land refers to the ratio of minimum amount of cultivated land per capita to the actual arable land area per capita. Grain yield and grain sowing areas are essential influencing factors of this index. This paper analyzes the influen-cing factors of the 2006 to 2012 pressure indexes of the Hehuang Valley in Qinghai Province. Then after converting them into energy in-dexes,it further studies the pressure index of cultivated land of the whole region. The conclusion reveals that the local pressure index of cultivated land changes with the agricultural structure adjustment in the region,and there are variations among those counties in the research area. This research analysis on the regional pressure index of cultivated land plays an important guiding role in the regional land-use planning in the future.