水资源与水工程学报2025，Vol.36Issue(5)：195-204,10.DOI:10.11705/j.issn.1672-643X.2025.05.23
水-能-碳视角下的中国主粮作物热量生产力评估
Caloric productivity assessment of major grain crops in China from water-energy-carbon perspective
摘要
Abstract
Under the combined pressures of population growth,ecosystem stress and resource limitations,how to ensure food security while advancing environmental sustainability has become a global development imperative.This study calculates water,energy consumption and carbon emission for three major grain crops across China's provinces,investigates the relative contributions of input factors to regional dispari-ties,and evaluates regional crop caloric productivity.Key findings show that water footprints per unit cal-ories are 134 kg/Mcal for wheat,209 kg/Mcal for rice,and 83 kg/Mcal for maize,corresponding to 1 375,848,and 868 kJ/Mcal of energy inputs,as well as 191,408,and 121 g CO2 eq/Mcal of carbon footprints,respectively.Nitrogen fertilizer production and irrigation water are the primary drivers of re-gional disparities in production efficiency,contributing 39.4%-68.1%in total to the gap of energy in-put.The Northeast China exhibits the highest caloric productivity,followed by the Central and North Chi-na,while the South China demonstrates the lowest productivity.From the perspective of minimizing in-puts and maximizing caloric output,it is advisable to shift a portion of crop cultivation to Northeast Chi-na.This would help ease China's resource shortages and environmental pressures while safeguarding food security.关键词
水-能-碳系统/热量生产力/主粮作物/生产效率/能量投入/粮食安全Key words
water-energy-carbon system/caloric productivity/major grain crop/production efficien-cy/energy input/food security分类
农业工程引用本文复制引用
张洪航,梁传彬,张文歆,陈世超,杜太生..水-能-碳视角下的中国主粮作物热量生产力评估[J].水资源与水工程学报,2025,36(5):195-204,10.基金项目
国家自然科学基金项目(52239002、52209072) （52239002、52209072）
