Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Evaluation of $N_2O$ Emissions with Changes of Soil Temperature, Soil Water Content and Mineral N in Red Pepper and Soybean Field

고추와 콩 재배에서 토양온도, 토양수분과 무기태질소 변화에 따른 아산화질소 배출 평가

  • Kim, Gun-Yeob (National Academy of Agricultural Science (NAAS), RDA) ;
  • So, Kyu-Ho (National Academy of Agricultural Science (NAAS), RDA) ;
  • Jeong, Hyun-Cheol (National Academy of Agricultural Science (NAAS), RDA) ;
  • Shim, Kyo-Moon (National Academy of Agricultural Science (NAAS), RDA) ;
  • Lee, Seul-Bi (National Academy of Agricultural Science (NAAS), RDA) ;
  • Lee, Deog-Bae (National Academy of Agricultural Science (NAAS), RDA)
  • 김건엽 (농촌진흥청 국립농업과학원) ;
  • 소규호 (농촌진흥청 국립농업과학원) ;
  • 정현철 (농촌진흥청 국립농업과학원) ;
  • 심교문 (농촌진흥청 국립농업과학원) ;
  • 이슬비 (농촌진흥청 국립농업과학원) ;
  • 이덕배 (농촌진흥청 국립농업과학원)
  • Received : 2010.11.15
  • Accepted : 2010.12.16
  • Published : 2010.12.31
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Abstract

Importance of climate change and its impact on agriculture and environment has increased with a rise of greenhouse gases (GHGs) concentration in Earth's atmosphere. Nitrous oxide ($N_2O$) emission in upland fields were assessed in terms of emissions and their control at the experimental plots of National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA) located in Suwon city. It was evaluated $N_2O$ emissions at different soil water content, soil temperature, and mineral N conditions in a upland cultivating red pepper and soy bean. The results were as follows: 1) There were significant correlation between amount of $N_2O$ emissions and soil temperature, soil water content and mineral N conditions showed $0.528^{**}$, $0.790^{***}$ and $0.937^{***}$ in red pepper field and $0.658^{***}$, $0.710^{***}$ and $0.865^{***}$ in soybean field, respectively. 2) From the contribution rate analysis as to contribution factors for $N_2O$ emission, it appeared that contribution rate was in the order of mineral N (71.9%), soil moisture content (23.6%), and soil temperature (4.5%) in pepper field and mineral N (65.5%), soil moisture contents (19.2%), and soil temperature (15.2%) in soybean field.

밭에서 $N_2O$ 배출에 영향을 주는 요인들의 특성을 파악하고, 이러한 요인들이 $N_2O$ 배출에 얼마나 영향을 주는지를 정량적으로 밝히고자, 수원시에 위치한 국립농업과학원 기후변화생태과 시험포장에서 $N_2O$ 배출 시험을 수행하였다. 고추와 콩에서 NPK+돈분퇴비를 처리하여 $N_2O$ 배출에 미치는 요인들과 배출에 미치는 영향을 조사한 결과는 다음과 같다. (1) $N_2O$ 배출량과 토양온도, 토양수분함량 및 무기태질소의 상관 분석한 결과, 고추에서 $0.528^{**}$, $0790^{***}$ 그리고 $0.937^{***}$, 콩은 $0.658^{***}$, $0.710^{***}$ 그리고 $0.865^{***}$으로 고도로 유의하여 $N_2O$ 배출량에 큰 영향을 주는 것으로 나타났다. (2) $N_2O$ 배출에 영향을 미치는 요인은 고추에서는 무기태질소 (71.9%), 토양수분 (23.6%), 토양온도 (4.5%), 그리고 콩은 무기태질소 (65.5%), 토양수분 (19.2%), 토양온도 (15.2%) 순으로 나타났다.

Keywords

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