山西省主要粮食作物生产水足迹研究

The water footprint of main grain crops in Shanxi province from a production perspective

基于水足迹理论,利用气象和农业数据,对山西省2005-2014年11个市主要粮食作物生产水足迹及水足迹进行量化,并对其时空差异进行分析。结果表明:1)山西省各地区粮食作物生产水足迹在研究时段内均呈下降趋势,全省综合作物生产水足迹由1.75m^3/kg减少到1.31m^3/kg;2)作物生产水足迹在区域间有由南向北增加的趋势,其中大同、吕梁、太原生产水足迹较高,具备提高水资源利用效率的空间;3)山西省粮食作物年均水足迹总量为163.65亿m^3,高于全省水资源总量,水资源利用呈不可持续状态。该结果可为山西省制定水资源管理策略提供参考。

Based on the theory of water footprint,temporal and spatial variability of water footprint of main grain crops in 11 cities of Shanxi province in 2005-2014 were analyzed by using meteorological and agricultural data.The results showed that the water footprint of crop production in all regions of Shanxi Province declined during the study period. Water footprint of integrated crop production in Shanxi Province dropped from 1. 75 m^3/kg to 1.31 m^3/kg from 2005 to 2014. In general,water footprint of crop production showed an increasing trend from south to north in all the 11 cities. The higher values of water footprint of crop production were observed in Datong,Lvliang and Taiyuan cities showing larger potential for improving the water use efficiency in these regions.The average annual total crop water footprint was 163. 65 × 108 m^3,which was higher than the total water resources in Shanxi Province. And in conclusion,water resources utilization in Shanxi Province was unsustainable recently. The results can provide available information for water resource management in Shanxi Province.