江苏省主要农作物的生产水足迹研究

运用水足迹的理论和方法对江苏省播种面积最大的6种农作物在2000-2010年间的水足迹进行计算,并分析各农作物生产水足迹的特点以及灰水足迹对水环境的不利影响。结果表明:6种农作物生产消耗的蓝水和绿水量总体上呈现下降趋势,江苏省农业生产的用水效率在逐年提高。6种农作物的绿水足迹占比为61.88%~88.17%,绿水在当地农作物生产中占有重要的地位;江苏省6种主要农作物中,水稻和小麦生产的水足迹之和占比为84.15%;单位质量棉花生产水足迹最大,其产生的灰水足迹也最大;单位质量小麦生产的水足迹是稻谷的近两倍,单位质量小麦生产产生的灰水足迹也明显大于水稻。

Study on water footprint of main crops production in Jiangsu Province

The paper calculated the water footprint of the six largest-sowing-area crops in Jiangsu province between 2000 to 2010 by using water footprint theory and method.It also analyzed the characteristics of each crop''s water footprint as well as the adverse effects of the gray water footprint on the water environment. The results showed that blue water and green water volume consumed in the production process of six kinds of crop generally appeared a downward trend, and water using efficiency of agricultural production has increased every year in Jiangsu Province. The green water footprint of six kinds of crop accounted for 61.88% to 88.17% of total water consumption and green water played an important role in the local crop production;the water footprint of rice and wheat production accounted for 84.15% of the total water footprint of the six major crops in Jiangsu province;the water footprint per unit mass of cotton production is the highest, and it also produced the highest gray water footprint; the water footprint per unit mass of wheat production is almost twice as well as that of rice, its gray water footprint is also significant greater than that of rice.