水资源保护2019，Vol.35Issue(1)：6-13,8.DOI:10.3880/j.issn.1004-6933.2019.01.002
基于通径分析的海河流域冬小麦水足迹及影响因素
Water footprint of winter wheat and its influencing factors in Haihe River Basin based on path analysis
摘要
Abstract
In order to quantify the water consumption of winter wheat, and make use of the regional water resources rationally, water footprint of winter wheat in Haihe River Basin from 1958 to 2016 was accounted, and direct and indirect effects of meteorological and agricultural input on water footprint of winter wheat was analyzed based on Penman formula, daily scale soil water balance and path analysis. The results show that the years average total water footprint of winter wheat in the basin was 239. 6 billion m3 and the average unit water footprint was 1 840 m3/t. The water footprint shows a significantly decreasing trend. The water footprint was heterogeneous in space with the largest water footprint in Beijing and Tianjin, followed by Shanxi, Shandong and Henan. The total power of agricultural machinery and the amount of converted fertilizer application have the biggest direct effect on the water footprint of winter wheat. Meteorological factors influence water footprint of winter wheat mainly by input factors of agricultural production. Water footprint of winter wheat can be reduced by increasing agricultural productivity. Fertilization should be reduced in areas with high grey water footprint, such as Beijing and Tianjin.关键词
冬小麦/水足迹/通径分析/海河流域Key words
winter wheat/water footprint/path analysis/Haihe River Basin分类
建筑与水利引用本文复制引用
韩宇平,贾冬冬,黄会平,王春颖,曲唱..基于通径分析的海河流域冬小麦水足迹及影响因素[J].水资源保护,2019,35(1):6-13,8.基金项目
"十三五"国家重点研发计划(2016YFC0401402) （2016YFC0401402）
国家自然科学基金(51679089,51609084,51709017) （51679089,51609084,51709017）
