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Does organic farming reduce environmental impacts? – A meta-analysis of European research  [2012]

Tuomisto, H.L. Hodge, I.D. Riordan, P. Macdonald, D.W.

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摘要
Organic farming practices have been promoted as, inter alia, reducing the environmental impacts of agriculture. This meta-analysis systematically analyses published studies that compare environmental impacts of organic and conventional farming in Europe. The results show that organic farming practices generally have positive impacts on the environment per unit of area, but not necessarily per product unit. Organic farms tend to have higher soil organic matter content and lower nutrient losses (nitrogen leaching, nitrous oxide emissions and ammonia emissions) per unit of field area. However, ammonia emissions, nitrogen leaching and nitrous oxide emissions per product unit were higher from organic systems. Organic systems had lower energy requirements, but higher land use, eutrophication potential and acidification potential per product unit. The variation within the results across different studies was wide due to differences in the systems compared and research methods used. The only impacts that were found to differ significantly between the systems were soil organic matter content, nitrogen leaching, nitrous oxide emissions per unit of field area, energy use and land use. Most of the studies that compared biodiversity in organic and conventional farming demonstrated lower environmental impacts from organic farming. The key challenges in conventional farming are to improve soil quality (by versatile crop rotations and additions of organic material), recyc
le nutrients and enhance and protect biodiversity. In organic farming, the main challenges are to improve the nutrient management and increase yields. In order to reduce the environmental impacts of farming in Europe, research efforts and policies should be targeted to developing farming systems that produce high yields with low negative environmental impacts drawing on techniques from both organic and conventional systems.
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其它题目

  • biodiversity
  • nitrous oxide
  • eutrophication
  • nitrogen
  • organic production
  • environmental impact
  • ammonia
  • meta-analysis
  • recycling
  • conventional farming
  • acidification
  • leaching
  • soil organic matter
  • nutrients
  • land use
  • soil quality
  • farms
  • crop rotation
  • energy requirements
  • issues and policy
  • nutrient management
  • emissions
  • energy

学术期刊

Journal of environmental management

ISSN : 0301-4797

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其他信息

语言 : English

类型 : Journal Article

In AGRIS since : 2015

: 112

Start Page : 309

End Page : 320

出版者 : Elsevier Ltd

所有题名 :

" Does organic farming reduce environmental impacts? – A meta-analysis of European research "