한국환경농학회지 (Korean Journal of Environmental Agriculture)

  • 제42권1호
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  • Pages.28-34
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  • 2023
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  • 1225-3537(pISSN)
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  • 2233-4173(eISSN)
한국환경농학회 (The Korean Society of Environmental Agriculture)
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신개발 심층시비장치를 이용한 심층시비의 밭작물 재배 효과

Understanding the Effects of Deep Fertilization on Upland Crop Cultivation and Ammonia Emissions using a Newly Developed Deep Fertilization Device

  • 홍성창 (농촌진흥청 국립농업과학원 기후변화평가과) ;
  • 김민욱 (농촌진흥청 국립농업과학원 기후변화평가과) ;
  • 김진호 (농촌진흥청 국립농업과학원 기후변화평가과) ;
  • 박성직 (국립한경대학교 지역자원시스템공학부)
  • Sung-Chang Hong (Climate Change & Assessment Division, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Min-Wook Kim (Climate Change & Assessment Division, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Jin-Ho Kim (Climate Change & Assessment Division, National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Seong-Jik Park (Department of Bioresources and Rural System Engineering, Hankyoung National University)
  • 투고 : 2023.03.17
  • 심사 : 2023.03.24
  • 발행 : 2023.03.31
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초록

Nitrogen fertilizers applied to agricultural lands for crop cultivation can be volatilized as ammonia. The released ammonia can catalyze the formation of ultrafine dust (particulate matter, PM2.5), classified as a short-lived climate change pollutant, in the atmosphere. Currently, one of the prominent methods for fertilizer application in agricultural lands is soil surface application, which comprises spraying the fertilizers onto the soil surface, followed by mixing the fertilizers with the soil. Owing to the low nitrogen absorption rate of crops, when nitrogen fertilizers are applied in this manner, they can be lost from land surfaces through volatilization. Therefore, investigating a new fertilization method to reduce ammonia emissions and increase the fertilizer utilization efficiency of crops is necessary. In this study, to develop a method for reducing ammonia emissions from nitrogen fertilizers applied to soil surfaces, deep fertilization was conducted using a newly developed deep fertilization device, and ammonia emissions from barley, garlic, and onion fields were examined. Conventional fertilization (surface application) and deep fertilization (soil depth of 25 cm) were conducted for analysis. The fertilization rate was 100% of the standard fertilization rate used for barley, and deep fertilization of N, P, and K fertilizers was implemented. Ammonia emissions were collected using a wind tunnel chamber, and quantified subsequently susing the indole-phenol blue method. Ammonia emissions released from the basal fertilizer application persisted for approximately 58 d, beginning from approximately 3 d after fertilization in conventional treatments; however, ammonia was not released from deep fertilization. Moreover, barley, garlic, and onion yields were higher in the deep fertilization treatment than in the conventional fertilization treatment. In conclusion, a new fertilization method was identified as an alternative to the current approach of spraying fertilizers on the soil surface. This new method, which involves injecting nitrogen fertilizers at a soil depth of 25 cm, has the potential to reduce ammonia emissions and increase the yields of barley, garlic, and onion.

키워드

과제정보

This study was carried out with the support of "Research Program for Agricultural Science & Technology Development (Project No. PJ016998)", National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea.

참고문헌

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