再分配(选举)
耕地
粮食安全
农业
业务
温室气体
农业经济学
中国
自然资源经济学
农业生产力
生产力
环境科学
农业科学
农业工程
地理
经济
工程类
经济增长
生态学
政治
政治学
生物
考古
法学
作者
Zihan Wang,Yulong Yin,Yingcheng Wang,Xingshuai Tian,Ying Hao,Qingsong Zhang,Yanfang Xue,O. Oenema,Shengli Li,Feng Zhou,Mingxi Du,Lin Ma,William D. Batchelor,Fusuo Zhang,Zhenling Cui
出处
期刊:Nature food
[Springer Nature]
日期:2022-12-01
卷期号:3 (12): 1031-1039
被引量:53
标识
DOI:10.1038/s43016-022-00646-0
摘要
China feeds 19.1% of the world’s population with 8.6% of the arable land. Here we propose an integrated approach combining crop redistribution and improved management to meet China’s food demand in 2030. We simulated the food demand, estimated the national crop production through the productivity of the top 10% of producers in each county, and optimized the spatial distribution of 11 groups of crop types among counties using the data of the top producers. Integrating crop redistribution and improved management increased crop production and can meet the food demand in 2030, while the agricultural inputs (N and P fertilizers and irrigation water) and environmental impacts (reactive N loss and greenhouse gas emissions) were reduced. Although there are significant socio-economic and cultural barriers to implementing such redistribution, these results suggest that integrated measures can achieve food security and decrease negative environmental impacts. County-specific policies and advisory support will be needed to achieve the promises of combining optimization strategies. A database from a survey of farmers, published articles and statistical yearbooks was developed to map crop- and county-specific yields, farm inputs, reactive N losses and greenhouse gas emissions in China. Optimized crop distributions combined with improved management are estimated to improve crop productivity and decrease farm inputs and environmental costs.
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