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The impact of low-input grass-based and high-input confinement-based dairy systems on food production, environmental protection and resource use
Agroecology and Sustainable Food Systems ( IF 2.6 ) Pub Date : 2020-02-02 , DOI: 10.1080/21683565.2020.1712572
Juliane Dentler 1 , Lukas Kiefer 2 , Theresa Hummler 1 , Enno Bahrs 2 , Martin Elsaesser 1
Affiliation  

The aim of this study was to assess if dairy intensification is associated with increased efficiency in food production, nutrient, and energy use. In-depth data from 12 high-input confinement-based and 12 low-input grass-based dairy farms in southwest Germany were analyzed. The study found that relative to high-input dairy systems, low-input grass-based dairy systems were 334% better in human-edible crude protein conversion efficiency and 328% better in human-edible gross energy conversion efficiency. Low-input dairy systems showed 28% higher nitrogen and 98% higher phosphorus use efficiencies. Results revealed no difference in energy conversion efficiency between the contrasting dairy systems. As a result, the ongoing intensification of dairy systems utilizing substantial amounts of human-edible crops, puts global food security at risk, has undesirable side effects on the environment and fails to utilize the evolutionary advantage of ruminants.



中文翻译:

低投入的草基和高投入的密闭乳品体系对粮食生产,环境保护和资源利用的影响

这项研究的目的是评估奶制品集约化是否与提高食品生产,营养和能源使用效率有关。分析了来自德国西南部的12个高投入密闭型和12个低投入草型奶牛场的深度数据。研究发现,相对于高投入的乳制品系统,低投入的草基乳制品系统在人类可食的粗蛋白转化效率方面提高了334%,在人类可食用总能量转化效率方面提高了328%。低投入乳制品系统的氮利用率提高了28%,磷利用率提高了98%。结果表明,对比的乳制品系统之间的能量转换效率没有差异。结果,不断利用大量人类食用农作物的奶业系统集约化经营,使全球粮食安全面临风险,

更新日期:2020-02-02
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