成果｜胡瑞法、张超、陈志钢等在Ecological Economics发表论文
浙江大学中国农村发展研究院国际院长、国际食物政策研究所（IFPRI）资深研究员陈志钢教授与北京理工大学胡瑞法教授、张超副教授等合作论文——The role of public agricultural extension services in driving fertilizer use in rice production in China在期刊Ecological Economics发表。Ecological Economics为SCI 一区期刊，最新影响因子为5.389。
公共农业推广服务推高化肥在中国水稻生产中的使用
The role of public agricultural extension services in driving fertilizer use in rice production in China
Ecological Economics
Yang Lin, Ruifa Hua, Chao Zhang, Kevin Chen
DOI：https://doi.org/10.1016/j.ecolecon.2022.107513
摘要：
化肥的过度使用会导致严重的环境退化，因此研究化肥使用的影响因素具有重要意义。为了养活世界上最多的人口，中国实行以生产力为主导的农业政策制度，建立了规模最大的公共农业推广体系。鉴于中国是世界上最大的化肥消费国，在以生产力为主导的农业政策体系下，理解公共农业推广服务(PAES)的作用可以为决策者采取措施减少化肥使用提供新的视角。本研究利用2018年1002名稻农的调查数据，采用处理效应模型，研究公共农业推广服务对化肥使用的影响及其异质性。结果表明，约22%的稻农采用了公共农业推广服务。在解决了内生性问题后，农户采用公共农业推广服务使水稻生产中的化肥总使用量、氮肥使用量和化肥支出分别提高了242.96千克/公顷、109.37千克/公顷和1400元/公顷。不同省份采用公共农业推广服务对化肥使用的影响不同。这些结果表明，应改变以生产力为主导的农业政策体制，加强农业社会化服务体系的发展，改变农业推广服务的内容和方式。
Abstract：
Fertilizer overuse causes serious environmental degradation, and it is important to identify the influencing factors of fertilizer use. To feed the largest population worldwide, China has adopted a productivity-led agricultural policy regime and established the largest public agricultural extension system. Given that China is the largest consumer of fertilizers, understanding the role of public agricultural extension services (PAES) in the context of the productivity-led agricultural policy regime can provide a new insight for policy-makers to take measures to reduce fertilizer use. Using survey data of 1002 rice farmers in 2018, this study employs the treatment-effect model to examine the effect of PAES adoption on fertilizer use and its heterogeneity. The results show that about 22% of rice farmers adopt PAES. After addressing the endogeneity issue, farmers' PAES adoption raises total fertilizer use, nitrogen fertilizer use and fertilizer expenditure in rice production by 242.96 kg/ha, 109.37 kg/ha and 1400 Chinese yuan per hectare (CNY/ha), respectively. The effects of PAES adoption on fertilizer use are heterogeneous in different provinces. These results indicate that moves should be directed towards altering the productivity-led agricultural policy regime, reinforcing the development of socialization agricultural service system, and altering the contents and approaches of agricultural extension services.
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