• 제목/요약/키워드: agricultural crop

검색결과 6,135건 처리시간 0.031초

밭토양에서 챔버 위치와 작물체 유·무에 따른 아산화질소 배출량 차이 분석 (The Differences of Nitrous Oxide (N2O) Emissions as Crop Presence and Location of Gas Sampling Chambers in Upland)

  • 정현철;최은정;이종식;김건엽;소규호
    • 한국기후변화학회지
    • /
    • 제7권4호
    • /
    • pp.427-432
    • /
    • 2016

  • Nitrous oxide is one of the main sources of greenhouse gases and its concentration has increased from 273 ppb in 1,750 to 315 ppb in 2005. Specially, nitrogen fertilizer used in agricultural soils is considered as an important source of atmospheric $N_2O$ emission. This study was conducted to estimate the difference of nitrous oxide emission as chamber position on furrow and ridge and crop existence in gas sampling chamber on upland. Four treatments used in this experiment were (1) no-fertilizer without crop in chamber on ridge, (2) fertilizer application without crop in chamber on ridge, (3) fertilizer application with crop in chamber on ridge, (4) fertilizer application without crop in chamber on ridge and furrow. Nitrous oxide emission at fertilizer application with crop in chamber on ridge were the highest while were the lowest at no-fertilizer without crop in chamber on ridge. There was no significant difference of nitrous oxide emission by chamber position, but total emission by crop existence in chamber was significant difference. Therefore, in order to estimate greenhouse gases emission using chamber method in upland, it should be considered in correlation with crop existence in chamber and characteristic changes like as the soil moisture, microbial flora by crop growth stage.

  • https://doi.org/10.15531/KSCCR.2016.7.4.427 인용

작목반 육성과 농협의 과제 (The Roles of Crop Units and Agricultural Cooperatives in Korea)

  • 이상영
    • 농촌지도와개발
    • /
    • 제3권2호
    • /
    • pp.219-232
    • /
    • 1996

  • The Crop Units and Agricultural Cooperatives is experiencing many difficulties with national and international environmental changes. For the developing of Crop Units and Agricultural Cooperatives, Crop Units and Agricultural Cooperatives make endeavor to lead members` spontaneous participation and the efficient communication between members, and to offer the efficient extension services and support activities for improvement of members` economic and social status.

  • PDF