Research on the Life Cycle of Agricultural Products in China by Focusing on Water Supply Sources

我们以中国西北黑河流域为研究对象进行的水平衡分析发现，黑河流域农业用水总量的86%来自蓝水。此外，通过访谈调查，阐明了主要农产品玉米和蔬菜的分布渠道和数量。基于张掖市在过去十年被指定为中国水政策改革试验点之一的事实，我们分析了土地/水利用的变化和随之而来的水平衡变化，以及当地农民对新的水管理制度的认识。因此，我们发现张掖市最近的水政策改革可能几乎不符合政府的预期。农业企业新开垦的土地每年消耗2。6×10^8m^3a^<-1>)比节省的水量(2)多。0×10^8m^3a^<-1>)由当地农民通过水政策改革。新开垦土地地下水的集约利用加速了地下水退化问题。因此，我国有必要推动产业结构向节水方向转变。

Our water balance analysis focusing on the Heihe River basin of Northwestern China found that about 86% of total agricultural water use is derived from blue water. In addition, the distributions channels and amount of main produce including maize and vegetables were illustrated through interview survey. Based on the fact that Zhangye city was designated as one of the experimental sites of water policy reforms in China during the past decade, we analyzed the land/water use changes and consequent water balance change as well as local farmers' awareness of the new water management system. As a result, we found that recent water policy reforms in Zhangye City might barely conform to the government's expectations. The newly reclaimed land by agricultural enterprises consumes(2. 6×10^8m^3a^<-1>) more water than the amount saved(2. 0×10^8m^3a^<-1>) by local farmers through water policy reforms. Intensive groundwater use in the newly reclaimed land accelerates groundwater decline issue. We conclude that it is necessary to facilitate the industrial structural change towards one consuming less water.