Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Studies on the Application Rate of Cattle Slurry and Urea N on Productivity of Silage Corn and Leaching of Nitrogen in Lysimeter

액상발효우분(Cattle Slurry) 및 요소의 N 시용수준이 옥수수의 생산성과 N의 용탈에 관한 연구

  • Published : 2002.03.01
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Abstract

This study was conducted to investigate the effects of the application rate of cattle slury and urea N on productivity of corn and environmental pollution in com cultivation soil. The experiment was conformed in lysimeter which was constructed with 0.33m diameter and 1m height. This study was arranged in split plot design. Main plots were the application rate of mineral fertilizer, as urea, such as 0, 100 and 200kgN/ha and subplots were the application rate of cattle slurry, such as 0, 200 and 400kgN/ha. The results obtained were summarized as follows. 1. Dry matter yields of corn increased as the application rate of cattle slurry and urea increased. 2. Total nitrogen content of whole corn was increased as the application rate of cattle slurry and urea increased 3. The average nitrate content in leaching water by application rate of the slurry and urea N was 7.78$\mu\textrm{g}$/$m\ell$(ranged from 6.27 to 9.02$\mu\textrm{g}$/$m\ell$). Nitrate content was hardly influenced by application rates of the slurry and urea. However, nitrate content rises in proportion to a rise in precipitation.

본 연구는 가축분뇨의 시용수준과 이의 효과를 증진시키기 위한 추가적인 화학비료 시용수준이 사료작물의 생산성과 이에 의한 환경오염에 미치는 영향에 대한 것으로써, lysimeter에서 옥수수에 대한 액상발효우분 시용수준과 추가적인 요소N의 시용수준에 따라 질소의 이용효율과 함께 NO$_3$$^{-}$의 용탈에 의한 환경오염에 미치는 영향을 정확히 규명, 가축분뇨의 자원화는 물론 가축분뇨에 의한 환경오염 방지대책 수립을 하고자 수행하였는데 그 결과는 다음과 같다. 1. 옥수수의 건물수량은 액상발효우분 및 요소 시용수준이 증가함에 따라 비례적으로 증가하였다. 2. 옥수수 중의 전질소 함량은 액상발효우분 및 요소의 시용수준이 증가함에 따라 증가를 하였다. 3. 용탈수 중의 NO$_3$$^{-}$ 함량은 평균 7.58ppm (6.27~9.02ppm)으로 매우 낮았고 시용수준간에도 차이가 거의 없었다. 그러나 강우량이 높은 시기에 NO$_3$￣의 용탈 함량도 증가하였다.

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