A meta-analysis of global crop water productivity of three leading world crops(wheat,corn,and rice)in the irrigated areas over three decades

作     者：Daniel J.Foley Prasad S.Thenkabail Itiya P.Aneece Pardhasaradhi G.Teluguntla Adam J.Oliphant 

作者机构：Western Geographic Science CenterUnited States Geological SurveyFlagstaffAZUSA Bay Area Environmental Research Institute(BAERI)NASA Research ParkMoffett FieldCAUSA 

出 版 物：《International Journal of Digital Earth》 (国际数字地球学报（英文）)

年 卷 期：2020年第13卷第8期

页      面：939-975页

核心收录：

学科分类：1004[医学-公共卫生与预防医学(可授医学、理学学位)] 0708[理学-地球物理学] 0835[工学-软件工程] 0704[理学-天文学] 100402[医学-劳动卫生与环境卫生学] 0811[工学-控制科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 10[医学] 

基　　金：U.S.Geological Survey WaterSMART(Sustain and Manage America’s Resources for Tomorrow)project 

主　　题：Crop water productivity sustainable agriculture water use/water savings wheat corn rice food and water security 

摘      要：The overarching goal of this study was to perform a comprehensive metaanalysis of irrigated agricultural Crop Water Productivity(CWP)of the world’s three leading crops:wheat,corn,and rice based on three decades of remote sensing and non-remote sensing-based ***,CWP data from 148 crop growing study sites(60 wheat,43 corn,and 45 rice)spread across the world were gathered from published articles spanning 31 different *** was overwhelming evidence of a significant increase in CWP with an increase in latitude for predominately northern hemisphere *** example,corn grown in latitude 40–50°had much higher mean CWP(2.45 kg/m^(3))compared to mean CWP of corn grown in other latitudes such as 30–40°(1.67 kg/m^(3))or 20–30°(0.94 kg/m^(3)).The same trend existed for wheat and rice as *** soils,none of the CWP values,for any of the three crops,were statistically ***,mean CWP in higher latitudes for the same soil was significantly higher than the mean CWP for the same soil in lower *** applied for all three crops *** wheat,the global CWP categories were low(≤0.75 kg/m^(3)),medium(0.75 to1.25 to≤1.75 kg/m^(3)),and high(1.75 kg/m^(3)).For rice the global CWP categories were low(≤0.70 kg/m^(3)),medium(0.70 to≤1.25 kg/m^(3)),and high(1.25 kg/m^(3)).USA and China are the only two countries that have consistently high CWP for wheat,corn,and *** and India have medium CWP for wheat and ***’s corn,however,has low ***,Turkey,Netherlands,Mexico,and Israel have high CWP for ***,Argentina,and Hungary have high CWP for corn,and Philippines has high CWP for *** other countries have either low or medium CWP for all three *** on data in this study,the highest consumers of water for crop production also have the most potential for water *** countries are USA