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Pursuing sustainable productivity with millions of smallholder farmers

发布时间:2018/3/28来源:水稻研究所

Zhenling Cui1, Hongyan Zhang1, Xinping Chen1, Chaochun Zhang1, Wenqi Ma2, Chengdong Huang1, Weifeng Zhang1,Guohua Mi1, Yuxin Miao1, Xiaolin Li1, Qiang Gao3, Jianchang Yang4, Zhaohui Wang5, Youliang Ye6, Shiwei Guo7, Jianwei Lu8, Jianliang Huang8, Shihua Lv9, Yixiang Sun10, Yuanying Liu11, Xianlong Peng11, Jun Ren12, Shiqing Li13, Xiping Deng13,Xiaojun Shi14, Qiang Zhang15, Zhiping Yang15, Li Tang16, Changzhou Wei17, Liangliang Jia18, Jiwang Zhang19, Mingrong He19,Yanan Tong5, Qiyuan Tang20, Xuhua Zhong21, Zhaohui Liu22, Ning Cao23, Changlin Kou24, Hao Ying1, Yulong Yin1, Xiaoqiang Jiao1,Qingsong Zhang1, Mingsheng Fan1, Rongfeng Jiang1, Fusuo Zhang1 & Zhengxia Dou25

 

Nature 

doi:10.1038/nature25785



 

Abstract

Sustainably feeding a growing population is a grand challenge1,2,3, and one that is particularly difficult in regions that are dominated by smallholder farming. Despite local successes4,5,6,7,8, mobilizing vast smallholder communities with science- and evidence-based management practices to simultaneously address production and pollution problems has been infeasible. Here we report the outcome of concerted efforts in engaging millions of Chinese smallholder farmers to adopt enhanced management practices for greater yield and environmental performance. First, we conducted field trials across China’s major agroecological zones to develop locally applicable recommendations using a comprehensive decision-support program. Engaging farmers to adopt those recommendations involved the collaboration of a core network of 1,152 researchers with numerous extension agents and agribusiness personnel. From 2005 to 2015, about 20.9 million farmers in 452 counties adopted enhanced management practices in fields with a total of 37.7 million cumulative hectares over the years. Average yields (maize, rice and wheat) increased by 10.8–11.5%, generating a net grain output of 33 million tonnes (Mt). At the same time, application of nitrogen decreased by 14.7–18.1%, saving 1.2 Mt of nitrogen fertilizers. The increased grain output and decreased nitrogen fertilizer use were equivalent to US$12.2 billion. Estimated reactive nitrogen losses averaged 4.5–4.7 kg nitrogen per Megagram (Mg) with the intervention compared to 6.0–6.4 kg nitrogen per Mg without. Greenhouse gas emissions were 328 kg, 812 kg and 434 kg CO2 equivalent per Mg of maize, rice and wheat produced, respectively, compared to 422 kg, 941 kg and 549 kg CO2 equivalent per Mg without the intervention. On the basis of a large-scale survey (8.6 million farmer participants) and scenario analyses, we further demonstrate the potential impacts of implementing the enhanced management practices on China’s food security and sustainability outlook.


附件: Pursuing sustainable productivity with millions of smallholder farmers


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