Selection of Useful Organic Materials as an Additional Fertilizer for Organic Red-pepper Production and the Application Effect
2008
Choi, D.H. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Sung, J.K. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea), E-mail: [email protected] | Lee, S.M. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Lee, Y.H. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Kim, J.M. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea) | Jung, J.A. (Chungbuk National University, Cheongju, Republic of Korea) | Song, B.H. (Chungbuk National University, Cheongju, Republic of Korea)
This study was conducted to select some effective organic materials for supplying mineral nutrients at the later red-pepper growing period under organic farming system, and to evaluate the application effect. Nutritional characteristics of organic materials, nitrogen release pattern during liquefying the selected organic materials, and crop growth were examined. Among 18 organic materials, meals such as soybean, rapeseed, cottonseed, and sunflower seed except for gluten had greater nitrogen content. Total nitrogen content liquefied solution of the mixture of organic materials and molasses or yogurt was measured after 7 days of the liquefying, thereafter, the mixture of rapeseed meal and yogurt showed the highest nitrogen, reaching about 3,000 mg L-¹. Selected liquid manure, mixture of rapeseed meal and yogurt, was applied 8 times to red-pepper plants with fertigation or foliar application. Total nitrogen of leaves at 150 days after transplanting was the highest (4.4%) in the treatment of foliar application of the selected liquid manure, whereas shoot dry weight and fresh fruit yield were the greatest in the treatment of fertigation.
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