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http://dx.doi.org/10.11625/KJOA.2015.23.4.867

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

Im, Jong-Uk (경상대학교 환경생명화학과)
Kim, Song-Yeob (경상대학교 환경생명화학과)
Yoon, Young-Eun (경상대학교 환경생명화학과)
Kim, Jang-Hwan (경상대학교 환경생명화학과)
Lee, Sang-Beom (국립농업과학원 유기농업과)
Lee, Yong-Bok (경상대학교 생명과학연구원)
Publication Information
Korean Journal of Organic Agriculture / v.23, no.4, 2015 , pp. 867-873 More about this Journal
Abstract
The potential of nitrogen mineralization was studied by applying organic fertilizer to soil and incubating at $25^{\circ}C$ 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 ($N_0$) 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 ($N_0$ treatment - $N_0$ 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 ($t_{1/2}$) 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.
Keywords
amino acid fertilizer; nitrogen mineralization; oil-cake; upland;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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