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감자 재배 화산회토양에서 질소시비 수준, 강우 및 온도 환경 변화에 따른 아산화질소 배출 특성

Influence of N Fertilization Level, Rainfall and Temperature on the Emission of N2O in the Jeju Black Volcanic Ash Soil with Potato Cultivation

  • 양상호 (제주특별자치도농업기술원) ;
  • 강호준 (제주특별자치도농업기술원) ;
  • 이신찬 (제주특별자치도농업기술원) ;
  • 오한준 (제주특별자치도농업기술원) ;
  • 김건엽 (농촌진흥청 국립농업과학원)
  • Yang, Sang-Ho (Jeju Special Self-governing Province Agricultural Research and Extension Services) ;
  • Kang, Ho-Jun (Jeju Special Self-governing Province Agricultural Research and Extension Services) ;
  • Lee, Shin-Chan (Jeju Special Self-governing Province Agricultural Research and Extension Services) ;
  • Oh, Han-Jun (Jeju Special Self-governing Province Agricultural Research and Extension Services) ;
  • Kim, Gun-Yeob (National Academy of Agricultural Science, RDA)
  • 투고 : 2012.03.09
  • 심사 : 2012.07.11
  • 발행 : 2012.08.31

초록

본 연구는 감자 재배 화산회 토양에서 질소시비 수준 및 강우, 온도 환경 변화에 따른 $N_2O$ 배출량을 측정하고 배출에 영향을 미치는 요인 특성을 구명하기 위하여 제주특별자치도농업기술원 시험포장에서 2년간 (2010~2011년) 수행되었다. 감자 재배기간 동안 $N_2O$ 배출량은 질소시비량이 많을수록 많았다. 재배시기별 $N_2O$ 배출량은 강우량 많은 시기인 재배 초기와 중기에 많았으나, 강우가 적고 한발 시기인 재배 말기에는 매우 적거나 거의 없는 경향을 보였다. $N_2O$ 배출 양상은 강우량 및 토양수분함량 변화와 대체로 유사한 경향을 보였다. $N_2O$ 배출량과 상관관계 (r)를 분석한 결과, '10년도에는 토양수분과 토양온도는 각각 $0.6251^{**}$, $0.6082^{**}$로 고도로 유의성이 인정되었으나, 토양 EC와는 0.1082로 유의성은 인정되지 않았다. '11년도에는 토양온도와는 $0.4879^{**}$로 유의성이 인정되었으나, 토양수분과 토양 EC와는 각각 0.0469, 0.0400으로 유의성은 인정되지 않았다. $NH_4$-N과 는 $0.7476^{**}$로 고도로 유의성이 인정되었으나, $NO_3$-N과 토양 질소 ($NO_3-N+NH_4-N$)와는 각각 0.0843과 0.1797로 유의성이 인정되지 않았다. 질소시비량에 따른 2년 동안의 $N_2O$ 배출량을 배출계수로 환산한 값은 $0.0040\;N_2O-N\;kg\;N^{-1}\;kg^{-1}$로 IPCC 가이드라인의 기본계수인 $0.0100\;N_2O-N\;kg\;N^{-1}\;kg^{-1}$ 보다는 약 2.5배 낮은 것으로 분석되었다.

This study was conducted to investigate the characteristic factors which have been influenced on nitrous oxide ($N_2O$) emissions related to the environment change of nitrogen application level, rainfall and temperature during the potato cultivation at black volcanic ash soil from 2010 to 2011. During the potato cultivation, the more amount of nitrogen fertilizer applied, $N_2O$ emissions amounts were released much. $N_2O$ emissions with the cultivation time were released much at the first and middle of cultivation with heavy rainfall, but it was released very low until the end of cultivation and drought season. $N_2O$ emissions mainly were influenced by the rainfall and soil water content. The correlation (r) with $N_2O$ emissions, soil wate, soil temperature in 2010 were very significant at $0.6251^{**}$ and $0.6082^{**}$ respectively, but soil EC was not significant to 0.10824. In 2011, soil temperature was very significant at $0.4879^{**}$, but soil water and soil EC were not significant at 0.0468 and 0.0400 respectively. Also, $NH_4$-N was very significant at $0.7476^{**}$, but $NO_3$-N and soil nitrogen ($NO_3-N+NH_4-N$) were not significant at 0.0843 and 0.1797, respectively. During the potato cultivation period, the average emissions factor of 2 years released by the nitrogen fertilizer application was presumed to be 0.0040 ($N_2O-N\;kg\;N^{-1}\;kg^{-1}$). This factor was lower about 2.5 times than the IPCC guideline default value (0.0100 $N_2O-N\;kg\;N^{-1}\;kg^{-1}$).

키워드

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피인용 문헌

  1. Effect of no-tillage and conventional tillage practices on the nitrous oxide (N2O) emissions in an upland soil: soil N2O emission as affected by the fertilizer applications vol.59, pp.6, 2016, https://doi.org/10.1007/s13765-016-0226-z
  2. Nitrous Oxide Emissions from Red Pepper, Chinese Cabbage, and Potato Fields in Gangwon-do, Korea vol.46, pp.6, 2013, https://doi.org/10.7745/KJSSF.2013.46.6.463