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The Survey of Actual Using Conditions of Farm-Made Liquid Fertilizers for Cultivating Environment-friendly Agricultural Products  

An, Nan-Hee (국립농업과학원 유기농업과)
Jo, Young-Sang (자연을 닮은 사람들)
Jo, Jeong-Rae (국립농업과학원 유기농업과)
Kim, Yong-Ki (국립농업과학원 유기농업과)
Lee, Yeon (국립농업과학원 유기농업과)
Jee, Hyeong-Jin (국립농업과학원 유기농업과)
Lee, Sang-Min (국립농업과학원 유기농업과)
Park, Kwang-Lai (국립농업과학원 유기농업과)
Lee, Byung-Mo (국립농업과학원 유기농업과)
Publication Information
Korean Journal of Organic Agriculture / v.20, no.3, 2012 , pp. 345-356 More about this Journal
Abstract
We conducted a survey of actual using conditions of farm-made liquid fertilizers by investigating their formulation types, materials, making processes, using methods and various beneficial effects on 29 farms certified by National Agricultural Products Quality Management Service to produce environment-friendly agricultural products in 2009. Most of the materials used to make liquid fertilizers are those that can be easily obtained around the farms. Molasses or black sugar are added as an energy source of microorganism. And leaf mold, bacterial cultures supplied by agricultural extension centers of local governments, and cultures of native microorganisms were used as microbial sources for fermenting effective microorganisms. Types of the farm-made liquid fertilizers were fermented liquid fertilizers, fermented plant juices, amino acid liquid fertilizers, calcium-liquid fertilizers, and phosphoric acid liquid fertilizers. Effects of liquid fertilizers used by the farms were found to promote plant growth by supplying nutrition, to accelerate blooming and flower bud formation, to enhance the quality of agricultural products such as increase of sugar contents and improvement of storing conditions, to induce resistance against diseases and insect pests, and to cause endurance to high temperature stress. Chemical properties of the liquid fertilizers collected were analyzed. As a result, pH and EC range showed differences according to kinds of the liquid fertilizers. Amount of macro-nutrients, such as nitrogen and phosphoric acid, in most of the collected liquid fertilizers, was found to be low. Even though the liquid fertilizers were made from same materials, their contents was found to be different depending on the making process.
Keywords
farm-made liquid fertilizer; environment-friendly agricultural products; fermentation; microorganism;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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