Determination of Nitrogen Application Level for Chinese Cabbage with Application of Poultry Manure Compost in Highland

계분퇴비 시용시 고랭지 배추에 대한 질소 시비량 결정

  • Lee, Choon-Soo (National Alpine Agricultural Experiment Station, RDA) ;
  • Shin, Kwan-Yong (National Alpine Agricultural Experiment Station, RDA) ;
  • Lee, Jeong-Tae (National Alpine Agricultural Experiment Station, RDA) ;
  • Lee, Gye-Jun (National Alpine Agricultural Experiment Station, RDA) ;
  • Ahn, Jae-Hoon (National Alpine Agricultural Experiment Station, RDA)
  • 이춘수 (농촌진흥청 고령지농업시험장) ;
  • 신관용 (농촌진흥청 고령지농업시험장) ;
  • 이정태 (농촌진흥청 고령지농업시험장) ;
  • 이계준 (농촌진흥청 고령지농업시험장) ;
  • 안재훈 (농촌진흥청 고령지농업시험장)
  • Received : 2003.06.03
  • Accepted : 2003.07.14
  • Published : 2003.10.30

Abstract

The purpose of this study was to establish a model for recommendable application level of nitrogen fertilizer based on soil testing for summer chinese cabbage in highland. A field experiment was carried out with various nitrogen application levels in sand loamy soil with and without poultry manure compost. The application level of N in poultry manure compost plot was found to be $291kg\;ha^{-1}$ for maximum yield of chinese cabbage, and it was 87% of the required N application level, $335kg\;ha^{-1}$, for maximum yield of chinese cabbage in nonmanure plot. In the treatment of poultry manure, approximately $174kg\;ha^{-1}$ of N was required to obtain the same yield of chinese cabbage as the maximum yield obtained in the treatments without poultry manure application. Therefore, with poultry manure application, N application level can be reduced by 40%. Using these results, a new equation for N recommendation for chinese cabbage in highland soil was proposed. With the average organic matter content of $33g\;kg^{-1}$ in highland field, the application levels of N for chinese cabbage were in the range of $215-129kg\;ha^{-1}$, which means that 32.8-59.7% of current application amount of N fertilizer can be reduced.

표고 750 m인 고랭지 사질양토에서 계분퇴비(N 2.0%, $P_2O_5$ 3.5%)를 $6Mg\;ha^{-1}$ 시용한 조건에서 여름배추에 대한 질소 시비 추천모델의 설정과 추천모델에 의한 질소 비료의 절감량을 구명하기 위하여 질소 시비수준을 달리하여 포장시험을 수행하였다. 계분퇴비 시용 시 최고수량 생산을 위한 질소 최고시비량은 $291kg\;ha^{-1}$이었으며 안전한 적정 질소시비량은 $174kg\;ha^{-1}$로 나타났다. 이러한 질소 시비수준은 계분퇴비 무시용 시의 최고시비량인 $335kg\;ha^{-1}$에 비하여 각각 0.87 및 0.60배에 해당한다. 산출된 시비배율을 현행 평난지 조건의 시비추천식에 대입하여 고랭지조건에 적합한 새로운 시비추천식을 도출해 낼 수 있었다. 고랭지 배추재배지의 평균 유기물 함량인 $33g\;kg^{-1}$을 적용해 보면, 계분퇴비 시용 시 질소 시비량은 최고 $215kg\;ha^{-1}$, 최저 $129kg\;ha^{-1}$로 현행 시비량에 비해 최고 59.7%, 최저 32.8%의 절감이 가능한 것으로 판단되었다. 계분퇴비 시용 시 최고수량을 생산한 질소 시비구에서는 계분퇴비 무시용구에 비하여 결구기와 수확기 토양의 유효인산 함량과 수확기 배추 경엽의 질소, 인산 및 칼리 함량과 이들의 흡수량이 증가하는 경향을 보였으며, 특히 질소 이용률을 10% 이상 높일 수 있었다.

Keywords

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