基于生命周期视角的种养一体化奶牛场环境经济效益评估

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Abstract In milk production, integrated maize silage planting and dairy cow breeding system (IPBS) is considered to be a more sustainable production mode to realize manure, straw and maize silage recycling, which is widely popularized in China. Clarity of mode's economic and environmental performance is supportive of government to formulate relevant policies for promoting sustainable development in milk production and assisting dairy farms with optimal technologies to get lower environmental risks and higher economic benefits. In this study, based on life cycle assessment (LCA), environmental performance and economic benefits of non-IPBS and IPBS were compared, there was only cow breeding in non-IPBS; maize silage planting was introduced in IPBS. The results showed that the net income for producing 1t of fat and protein corrected milk (FPCM) in non-IPBS was 1427Chinese yuan (CNY), while in IPBS, the net income could increase by 7% compared with non-IPBS. In IPBS, self-sufficiency rate of maize silage was only 32%, if it raised to 100%, the net income could be upgrade by 19% compared with non-IPBS. In addition, land transfer cost also influenced the net income in IPBS, when the cost increases to 14695RMB/hm², the net income for producing 1t FPCM in IPBS would be the same as that of non-IPBS. Compared with non-IPBS, IPBS has better environmental performance, specifically, GHG emissions, non-renewable energy use, water use and land use reduced by 6%, 6%, 5% and 7%, respectively. If the self-sufficiency rate of maize silage rises to 100% in IPBS, environmental indicators mentioned above will reduce by 16%, 16%, 11% and 14%, respectively. In milk production, IPBS has great potential in increasing net income from reducing feed costs, and contributing in reducing GHG emissions, non-renewable energy use, water use and land use.

Key words： life cycle assessment (LCA) integrated maize silage planting and dairy cow breeding system (IPBS) milk production environmental cost economic benefits

Received: 27 December 2020

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	HUANG Xian-lei
	SHI Bo-yang
	ZHANG Ying-nan
	LONG Zhao-yu
	YIN Chang-bin

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HUANG Xian-lei,SHI Bo-yang,ZHANG Ying-nan等. Economic and environmental assessment of the integrated maize silage planting and dairy cow breeding system based on LCA[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(8): 3944-3955.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I8/3944

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