摘要
对1978年以来陕西省粮食总产量、耕地面积的变化以及相关影响因素进行统计分析,结果表明,陕西省耕地资源数量呈持续减少趋势,其主要原因是生态退耕和农业产业结构调整,其次为建设用地、灾毁等;粮食总产量呈波动上升趋势,粮食总量年变化率与粮食播种面积年变化率、耕地面积减少量和因其导致的粮食减产量变化趋势高度一致,说明耕地面积的减少直接导致粮食产量的减少,耕地资源数量是影响陕西省粮食产量的重要因素。因此,保持一定数量的耕地面积的动态平衡是保障粮食安全的先决条件。
Analysis was made of the total grain output and the change of cultivated land area and relevant influencing factors since 1978 in Shaanxi Province. The results show that the cultivated land resources have continued to decline. The main reasons are due to the ecological returning of farmland to forest and the restructuring of agricultural related industries, then the construction use, disaster damage and so on. The grain outputs are on the fluctuant rise. The annual change rate of overall grain output is highly consistent with the grain planting area, and the decrease of cultivated land area results in the reduction of grain output. The quantity of cultivated land resources are the main influencing factors in grain output in Shaanxi Province. So, maintaining the dynamic balance of a certain quantity of cultivated land is a prerequisite for the guarantee of food security.
出处
《干旱地区农业研究》
CSCD
北大核心
2009年第4期230-233,239,共5页
Agricultural Research in the Arid Areas
基金
国家自然科学基金项目(40672108)
中国科学院黄土与第四纪地质国家重点实验室项目(SKLLQG0705)
关键词
陕西省
耕地数量
粮食产量变化
粮食安全
Shaanxi Province
the quantity of cultivated land
the change of grain output
food security
