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Nitrogen Mineralization in Soil Amended with Oil-Cake and Amino Acid Fertilizer under a Upland Condition

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한국유기농업학회지 (Korea Journal of Organic Agriculture)
한국유기농업학회 (Korea Association Of Organic Agriculture)
초록

The potential of nitrogen mineralization was studied by applying organic fertilizer to soil and incubating at 25℃ for 28 weeks. The organic fertilizers used in this experiment were oil-cake (CF-Ⅰ, CF-Ⅱ) and amino acid fertilizer (AAF-Ⅰ, AAF- Ⅱ). Accumulated mineralized nitrogen (N) fits the frist-order kinetics during incubation. The N mineralization potential (No) for organic fertilizers treated soil was highest at AAF-Ⅱ treatment with a value of 27.71 N mg/100g, then followed by CF-Ⅱ, AAF-Ⅰ, CF-Ⅰ. The pure N mineralization potential (N0 treatment - N0 control) for CF-Ⅰ, CF-Ⅱ, AAF-Ⅰ, AAF-Ⅱ were 2.55, 5.83, 3.66, 8.57 N mg/ 100g, respectively. The amount of N mineralized from organic fertilizers applied soil ranged from 46% to 61% of the total N content in organic fertilizer. The half-life (t1/2) of organic nitrogen in soil treated with oil-cake and amino acid fertilizer was 17-21 days. Therefore, half of nitrogen contained in oil-cake and amino acid fertilizer was mineralized after 3 weeks application.

저자
  • 임종욱(경상대학교 환경생명화학과) | Im, Jong-Uk
  • 김송엽(경상대학교 환경생명화학과) | Kim, Song-Yeob
  • 윤영은(경상대학교 환경생명화학과) | Yoon, Young-Eun
  • 김장환(경상대학교 환경생명화학과) | Kim, Jang-Hwan
  • 이상범(국립농업과학원 유기농업과) | Lee, Sang-Beom
  • 이용복(경상대학교 생명과학연구원) | Lee, Yong-Bok Corresponding author