《AARES》| Zheng et al：采用有机土壤改良剂及其对农场绩效的影响：来自中国小麦种植者的证据

摘要：本文基于中国558位种植小麦农户的家庭调查数据，研究了采用有机土壤改良剂（OSA）的决定因素，及其对作物产量和净收益的影响。采用内生转换模型来说明源自可观察和不可观察因素的选择偏差。实证结果表明，家庭人数，受抚养比率，机器所有权和无偿劳动是影响农民采用有机土壤改良剂的主要因素，而有机土壤改良剂的采用对小麦单产和净收益具有显著的积极影响。特别是，采用有机土壤改良剂的处理效应使小麦产量和净收益分别增加22％和24％。此外，按农场规模进行的分类分析显示，与小规模农户相比，大规模农户往往获得更高的小麦单产量和净收益。

关键词：影响评估，净收益，有机土壤改良剂，小麦产量

Abstract:  This study examines the determinants of adoption of organic soil amendments (OSAs) such as organic fertiliser and farmyard manure and its impact on crop yields and net returns, using household survey data of 558 wheat farmers in China. We employ an endogenous switching regression model to account for selection bias stemming from both observable and unobservable factors. The empirical results show that household size, dependency ratio, machine ownership and non-paid labour are main factors that determine farmers’ decision to adopt OSA, and the OSA adoption has a positive and statistically significant impact on wheat yields and net returns. In particular, the treatment effects of OSA adoption are to increase wheat yields and net returns by appropriately 22 and 24 per cent, respectively. Moreover, disaggregated analysis by farm size reveals that large-scale households tend to obtain higher wheat yields and net returns than their small-scale counterparts.

Keywords: impact evaluation, net returns, organic soil amendments, wheat yields

《AUSTRALIAN JOURNAL OF AGRICULTURAL AND RESOURCE ECONOMICS》（AARES），最新影响因子为1.386，刊载方向为管理科学、农业经济与政策。

原文链接：

https://onlinelibrary.wiley.com/doi/10.1111/1467-8489.12406

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