Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
권호 표지

Effects of Slope and Fertilizer Application Method on the Behavior of Nitrogen in Saprolite Piled Highland

석비레 성토지에서 경사도 및 시비방법이 시용 질소의 행동에 미치는 영향

  • 김기덕 (농촌진흥청 고령지농업연구소) ;
  • 안재훈 (농촌진흥청 고령지농업연구소) ;
  • 박경훈 (농촌진흥청 고령지농업연구소) ;
  • 이응호 (농촌진흥청 고령지농업연구소) ;
  • 박철수 (농촌진흥청 고령지농업연구소) ;
  • 황선웅 (농촌진흥청 고령지농업연구소) ;
  • 이상모 (서울대학교 농업과학공동기기센터)
  • Received : 2006.04.25
  • Accepted : 2006.09.01
  • Published : 2006.10.30
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Abstract

The lysimeter ($1.2m\;with{\times}1.6m\;length$) experiment using $^{15}N$ tracer method was conducted to investigate the influence of slopes (degree 5, 15 and 30%) and fertilizer application methods (solid application and fertigation) on the behavior of applied urea in saprolite piled highland with Chinese cabbage cultivation. NDFFs(nitrogen derived from fertilizer) in soil were increased with decreasing of degree of slope and of depth of soil. The recovery as percentage of fertilizer nitrogen by Chinese cabbage were 69.5% for solid application and 76.5% for fertigation in 5% slope, 65.0% for solid application and 70.2% for fertigation in 15% slope, and 56.1% for solid application and 62.3% for fertigation in 30% slope. There, fertigation will make great contributions to the reduction of environmental contamination by run off and to the increase of fertilizer efficiency in Chinese cabbage cultivated highland.

석비레 성토지에서 고랭지배추 재배 시 시비 효율을 증대에 필요한 자료를 얻기 위하여, 중질소 추적자법을 이용한 라이시메터에서 경사도와 시비방법이 시용질소의 행동에 미치는 영향을 조사하였다. 석비레 성토지 토양으로 경사도가 5, 15 및 30%가 되도록 라이시메터 (폭 1.2m ${\times}$ 길이 1.6 m)를 충진한 후 중질소로 표지된 요소를 입자형태로 살포 (고형비료시비구) 하거나 관개수에 녹여 고랑관수 (관비구) 하였다. 토양 질소 중 시용한 요소로부터 유래한 질소가 차지하는 비율 (NDFF, nitrogen derived from fertilizer)은 경사도가 낮을수록, 또한 토양깊이가 얕을수록 증가하였다. 배추에 의한 시비 질소의 회수율은 경사도 5%에서 고형비료시비구 69.5%, 관비구 76.5%, 경사도 15%에서 고형비료시비구 65.0%, 관비구 70.2% 및 경사도 30%에서 고형비료시비구 56.1%, 관비구 62.3%로서 경사도가 낮을수록 높았으며 관비구가 고형비료시비구보다 높았다. 따라서 고랭지배추 재배시 관비형태의 시비방법을 사용하면 시용비료에 의한 환경오염을 감소시키고, 작물에 의한 시용비료의 이용률을 증가시키는데 크게 기여할 것으로 판단된다.

Keywords

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