Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Potential Nitrogen Mineralization and Availability in Upland Soil Amended with Various Organic Materials

  • Im, Jong-Uk (Division of Applied Life Science (BK 21plus program), Graduate School, Gyeongsang National University) ;
  • Kim, Song-Yeob (Institute of Agriculture & Life Science Gyeongsang National University) ;
  • Jeon, Seong-Hwa (Division of Applied Life Science (BK 21plus program), Graduate School, Gyeongsang National University) ;
  • Kim, Jang-Hwan (Division of Applied Life Science (BK 21plus program), Graduate School, Gyeongsang National University) ;
  • Yoon, Young-Eun (Division of Applied Life Science (BK 21plus program), Graduate School, Gyeongsang National University) ;
  • Kim, Sook-Jin (National Institute of Crop Science, RDA) ;
  • Lee, Yong-Bok (Institute of Agriculture & Life Science Gyeongsang National University)
  • Received : 2017.02.01
  • Accepted : 2017.02.28
  • Published : 2017.02.28
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Abstract

In this study, we evaluated the nitrogen (N) mineralization potential and Nitrogen use efficiency (NUE) of oil-cake, compost, hairy vetch and barley, which are the most widely used organic amendments in South Korea. The N mineralization potential (No) for organic fertilizers treated soil was highest for the hairy vetch treatment with a value of $18.9mg\;N\;100\;g^{-1}$, followed by oil-cake, barley and compost. The amount of pure N mineralization potentials in hairy vetch, oil-cake, barley and compost treatments were 8.42, 7.62, 3.82 and $3.60mg\;N\;100\;g^{-1}$, respectively. The half-life ($t_{1/2}$) of organic N in soil amended with oil-cake fertilizer mineralized quickly in 17 days. While, $t_{1/2}$ values of organic N for the compost and barley treatments accounted to 44.4 and 44.1 days, respectively. Oil-cake was good in supplying nutrients to plants. Compost and barley inhibited plant growth in the beginning growth stage and this is attributed to N immobilization effect. The results of this study highlight that compost and barley could be used as potential slow release fertilizers in conventional agriculture.

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References

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