良种补贴政策的环境效应研究

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Abstract In this study, the wheat improved seed variety subsidy was taken as an example and the fertilizer application per unit area was used as a proxy variable to assess the environmental effects. Based on relevant agricultural data at the municipal level, a difference-in-differences model was constructed to quantify the changes in fertilizer application per unit area resulting from policy implementation. After that, the changes in planting costs, greenhouse gas emissions and social carbon costs due to changes in fertilizer application were estimated. The results showed that the policy had great environmental benefits, with the implementation of the policy resulting in a reduction of 5.9% in fertilizer application per unit area, a reduction of 139.42CNY/hm² in planting costs, a reduction of 822.06kg CO₂e/hm² in greenhouse gas emissions and a reduction of 301.91CNY/hm² in social carbon costs, fully compensating for the financial expenditure on the subsidy. The potential environmental impact should be taken into account in the development, improvement and extension of agricultural subsidy policies in the future, in order to enhance synergies between increased agricultural production and environmental benefits.

Key words： improved seed variety subsidy environmental effects difference-in-differences

Received: 02 March 2022

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X196

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	Articles by authors
	YI Hang
	GU Wei-yi
	SUN Jin-jie
	LIU Bei-bei

Cite this article:

YI Hang,GU Wei-yi,SUN Jin-jie等. Environmental effects of improved seed variety subsidy policy[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(10): 4954-4960.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I10/4954

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