한국환경농학회지 (Korean Journal of Environmental Agriculture)

  • 제41권4호
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  • Pages.230-235
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  • 2022
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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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질소비료의 심층시비에 의한 논과 밭 토양의 암모니아 배출 억제 효과

Reducing the Effect of Ammonia Emissions from Paddy and Upland Soil with Deep Placement of Nitrogen Fertilizers

  • 홍성창 (농촌진흥청 국립농업과학원 기후변화평가과) ;
  • 김민욱 (농촌진흥청 국립농업과학원 기후변화평가과) ;
  • 김진호 (농촌진흥청 국립농업과학원 기후변화평가과)
  • 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)
  • 투고 : 2022.09.21
  • 심사 : 2022.11.03
  • 발행 : 2022.12.31
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초록

BACKGROUND: Ammonia gas emitted from nitrogen fertilizers applied in agricultural land is an environmental pollutant that catalyzes the formation of fine particulate matter (PM2.5). A significant portion (12-18%) of nitrogen fertilizer input for crop cultivation is emitted to the atmosphere as ammonia gas, a loss form of nitrogen fertilizer in agricultural land. The widely practiced method for fertilizer use in agricultural fields involves spraying the fertilizers on the surface of farmlands and mixing those with the soils through such means as rotary work. To test the potential reduction of ammonia emission by nitrogen fertilizers from the soil surface, we have added N, P, and K at 2 g each to the glass greenhouse soil, and the ammonia emission was analyzed. METHODS AND RESULTS: The treatment consisted of non-fertilization, surface spray (conventional fertilization), and soil depth spray at 10, 15, 20, 25, and 30 cm. Ammonia was collected using a self-manufactured vertical wind tunnel chamber, and it was quantified by the indophenol-blue method. As a result of analyzing ammonia emission after fertilizer treatments by soil depth, ammonia was emitted by the surface spray treatment immediately after spraying the fertilizer in the paddy soil, with no ammonia emission occurring at a soil depth of 10 cm to 30 cm. In the upland soil, ammonia was emitted by the surface spray treatment after 2 days of treatment, and there was no ammonia emission at a soil depth of 15 cm to 30 cm. Lettuce and Chinese cabbage treated with fertilizer at depths of 20 cm and 30 cm showed increases of fresh weight and nutrient and potassium contents. CONCLUSION(S): In conclusion, rather than the current fertilization method of spraying and mixing the fertilizers on the soil surface, deep placement of the nitrogen fertilizer in the soil at 10 cm or more in paddy fields and 15 cm or more in upland fields was considered as a better fertilization method to reduce ammonia emission.

키워드

과제정보

This study was carried out with the support of "Research Program for Agricultural Science & Technology Development (Project No. PJ016763)", National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea.

참고문헌

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