中国粮食生产蓝绿水资源利用效率分析

发布时间：2018-05-28 10:27

本文选题：粮食 + 水分生产率　；参考：《排灌机械工程学报》2017年02期

【摘要】：为分析蓝绿水资源利用效率的空间差异,计算了省区尺度总农田与灌溉农田广义水资源利用量水分生产率(P_(tu),P_(iu))与蒸散量水分生产率(P_(tET),P_(iET))以及雨养农田水分生产率(P_r).分析了2010年不同水分生产率指标的空间差异和灌溉对水分生产率的影响.结果显示:P_(tu),P_(tET),P_(iu),P_(iET)和P_r分别为0.765,0.979,0.767,1.002及0.758 kg/m~3;P_(tu),P_(tET),P_(iu)及P_(iET)的空间分布格局相似,均与Pr无显著相关性,灌溉农田在粮食生产、水资源利用及水分生产率空间分布上起主导作用;全国灌溉农田粮食单产是雨养农田的2.6倍,黄淮海平原及其周边省区的Piu高于Pr,而灌溉在海南等15个省区的增产效益以降低水分生产率为代价.东北和西北地区蓝绿水资源利用效率的提升空间较大.研究可为农业水资源利用及管理实践提供参考.
[Abstract]:In order to analyze the spatial difference of water use efficiency between total farmland and irrigated farmland, the water productivity and evapotranspiration water productivity of total farmland and irrigated farmland were calculated. The spatial differences of different water productivity indexes in 2010 and the effects of irrigation on water productivity were analyzed. The results showed that the distribution pattern of the structure of the population was 0.765 / 0.979 / 0.7671.002 and 0.758 kg / m / 3 respectively, and the spatial distribution pattern of the structure was similar and had no significant correlation with pr, but the spatial distribution of irrigated farmland played a leading role in grain production, water use and spatial distribution of water productivity. The grain yield of irrigated farmland in China is 2.6 times higher than that of rain-fed farmland. The Piu of Huang-Huai-Hai plain and its surrounding provinces is higher than that of PR.And the benefit of irrigation in 15 provinces such as Hainan is at the cost of reducing water productivity. The utilization efficiency of blue and green water resources in Northeast China and Northwest China is relatively large. The research can provide reference for agricultural water resources utilization and management practice.
【作者单位】：赤峰学院资源与环境科学学院;中南民族大学资源与环境学院;河海大学水文水资源与水利工程科学国家重点实验室;
【基金】：国家自然科学基金资助项目(51609065,51509273) 中央高校基本科研业务费专项资金资助项目(2015B11014)
【分类号】：F326.11

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