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Specification Scheme of Pig Liquid Manure as Organic Agricultural Substances Used for Organic Farming

  • Seo, Il-Hwan (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University) ;
  • Lee, Kyo-Suk (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University) ;
  • Rhie, Ja-Hyun (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University) ;
  • Min, Se-Won (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University) ;
  • Chung, Doug-Young (Department of Bio-environmental Chemistry, Collage of Agriculture and Life Science, Chungnam National University)
  • Received : 2017.08.07
  • Accepted : 2017.11.06
  • Published : 2017.10.31

Abstract

A more efficient use of nutrients from organic sources can benefit both farmers and water quality in agriculture. In this paper we reviewed information related to the regulations and guidelines of a swine liquid fertilizer to propose an establishment scheme for the official standards of swine manure slurry as a liquid fertilizer for organic farming. According to the law of establishment and designation of official standard of fertilizers, the liquid fertilizer made with pig liquid manure belongs to the byproduct fertilizer as of one of organic fertilizer. However, the official standards for byproduct fertilizers including the liquid fertilizer set by the Rural Development Administration (RDA), especially for a liquid swine manure fertilizer, should be revised to meet the goals of laws pursuing the environmentally sound agriculture, especially for organic farming because the terms and relevant standards need additional specific standards alike the standards such as impurities and parameter for declaration in EU. Therefore, it is suggested that official standards for byproduct fertilizers should be revised with respect to nutrient, salt content as of SAR and Na content instead of NaCl. Also we need to develop the maximum limit of heavy metals in soil to which the liquid fertilizer can be applied, as well as application rate depending on EC of the liquid fertilizer.

Acknowledgement

Supported by : Chungnam National University

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