Spatial-temporal variations of food provision in China
Spatial-temporal variations of food provision in China
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DOI：
10.1016/j.proenv.2012.01.187
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Qing Wang;T. Yue;C. L. Wang;Z. Fan;Xuehua Liu
中科院分区：
文献类型：
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作者：
Qing Wang;T. Yue;C. L. Wang;Z. Fan;Xuehua Liu
本文收集了中国近25年的粮食生产数据，并利用ArcGIS工具进行了空间化。然后将所有的食物产量转化为食物营养指数，显示中国可以提供多少食物营养。结果图显示了中国食物供给的空间结构。利用ArcGIS工具计算了食物供给相关的平均中心和人口平均中心。对比分析了各类食物供给中心的动态演变，旨在了解食物供给状况和变化趋势，以及食物与人口的关系。结果表明，2000年中国农田生产的食物热量为1.469×1015 kcal，食物蛋白质为4.315× 107 t，食物脂肪为1.314× 107 t，分别可供给1754、1751和4.44亿人的基本小康生活。食物热量和食物蛋白质远不能自给，但食物脂肪面临严重不足。与食物供给相关的平均中心均分布在华北平原，而人口平均中心位于华中地区，在食物供给中心的南面。1980 ~ 2005年，粮食平均中心总体上呈北移趋势：耕地、粮食产量、食物热量、食物蛋白质和食物脂肪的平均中心分别向西北、北移了199 km、270 km、230 km、360 km和290 km。从1990年到2005年，粮食、肉类和人口的中心位置分别向东北方向移动了118 km，小麦向东南方向移动了59.6 km，玉米向西南方向移动了311 km，大豆向东北方向移动了267.1 km，油料向东南方向移动了33.7 km，肉类向东北方向移动了433.2 km，人口向东南方向移动了12.1 km。
In this study, Cropland Food production data of China in recent 25 years were collected and spatialized with ArcGIS tools. Then all food productions were converted to food nutrition index, showing how much food nutrition China can supply. The spatial structure of food provision in China was shown in the result maps. Food provision related mean centers and population mean centers were calculated with ArcGIS tools. The dynamic evolvement of each kind of food provision mean centers was analyzed contrastively; aiming to find out the situation and change trends of food provision and the relationship between food and population. Results show that, in 2000, the cropland in China produced 1.469×1015 kcal of food calorie, 4.315×107t of food protein and 1.314×107t of food fat, which can supply for 1754, 1751 and 444 million persons under primary well-to-do life. Food calorie and food protein were far more than self-sufficient but food fat faced with great deficiency. Food-provision-related mean centers all distributed in the North China Plain, while population mean center was located in Central China, south to the centers of food provision. From 1980 to 2005, food mean centers showed a generally northwards moving trend: mean centers of cropland, grain production, food calorie, food protein and food fat moved 199 km north-westwards, 270 km northwards, 230 km northwards, 360 km northwards, and 290 km northwards, respectively. From 1990 to 2005, mean centers of crops, meat and population showed the following moving trends: rice 118 km north-eastwards, wheat 59.6 km south-eastwards, maize 311 km south-westwards, soybean 267.1 km north-eastwards, oilseeds 33.7 km south-eastwards, meat 433.2 km north-eastwards and population 12.1 km south-eastwards.