한국환경농학회지 (Korean Journal of Environmental Agriculture)

  • 제42권3호
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  • Pages.211-219
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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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중량식 라이시미터에서 동계 작물(청보리) 재배에 따른 밭토양 양분수지

Nutrient Balance during Crop (Forage Barley) Cultivation in Winter Season: A Weighing Lysimeter Study

  • 안진희 (농촌진흥청 국립농업과학원 농업환경부 토양비료과) ;
  • 이찬욱 (농촌진흥청 국립농업과학원 농업환경부 토양비료과) ;
  • 옥정훈 (농촌진흥청 국립농업과학원 농업환경부 토양비료과) ;
  • 박혜진 (농촌진흥청 국립농업과학원 농업환경부 토양비료과) ;
  • 송요성 (농촌진흥청 국립농업과학원 농업환경부 토양비료과) ;
  • 이예진 (농촌진흥청 국립농업과학원 농업환경부 토양비료과)
  • Jin-Hee An (Soil and Fertilizer Management Division, Department of Agricultural Environment, National Institute of Agricultural Science, Rural Development Administration) ;
  • Chan-Wook Lee (Soil and Fertilizer Management Division, Department of Agricultural Environment, National Institute of Agricultural Science, Rural Development Administration) ;
  • Jung-Hun Ok (Soil and Fertilizer Management Division, Department of Agricultural Environment, National Institute of Agricultural Science, Rural Development Administration) ;
  • Hye-Jin Park (Soil and Fertilizer Management Division, Department of Agricultural Environment, National Institute of Agricultural Science, Rural Development Administration) ;
  • Yo-Sung Song (Soil and Fertilizer Management Division, Department of Agricultural Environment, National Institute of Agricultural Science, Rural Development Administration) ;
  • Ye-Jin Lee (Soil and Fertilizer Management Division, Department of Agricultural Environment, National Institute of Agricultural Science, Rural Development Administration)
  • 투고 : 2023.08.09
  • 심사 : 2023.08.31
  • 발행 : 2023.09.30
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초록

중량식 라이시미터를 이용하여 사양질과 식질 토양에서 동계 작물인 청보리 재배 여부에 따른 양분 유출과 양분 수지를 평가하였다. 양분 유출과 관련된 지하 배수량은 식질에서 가장 많았으며, 동계 작물 재배 여부에 따른 토양 수분함량을 비교해보면 나지에서는 사양질과 식질 토양 모두 30-40%를 유지하였고, 청보리 재배구는 생육 재생기인 3-4월에 평균 증발산량이 평균 2.1-6.7 mm·day-1이었으며, 토양 수분함량은 18.1-21.8%까지 낮아졌다. 동계작물 재배 시 봄철 생육재생기에 생체량이 증가함에 따라 증발산량도 증가하기 때문에 수분이 지상부로 이동하므로 양분의 지하유출을 예방할 수 있을 것으로 판단된다. 또한 사양질 토양에서 청보리의 재배에 따른 양분수지는 비료 공급량에 비해 작물 흡수량이 많아 음의 값을 나타냈으며, 토양에 집적된 양분을 이용했을 것으로 추측된다. 따라서 동계에 적정량의 비료를 주고 사료작물을 재배하면 경지 이용률을 높이고, 양분수지를 낮추는데 도움이 될 것으로 판단된다.

Nutrient balance is an environmental indicator for assessing the potential of sustainable agriculture. Improving the use of arable land is crucial for reducing the nutrient balance. This study monitored soil water content, seepage water, crop growth, and nutrient balance in weighing lysimeters during forage barley (Hordeum vulgare L., "Yeongyang") cultivation from October to April. The study was conducted from 2020 to 2022, and the treatments included forage barley cultivation (clay loam, CL-FC; sandy loam, SL-FC) and bare soils. During the regeneration period (March to April), the soil moisture contents of bare and forage barley-cultivated soils were approximately 30-40% and 18.1-21.8%, respectively. The daily evapotranspiration of forage barley was 6.09 mm. The nitrogen balances for SL-FC and CL-FC were -0.43 to -2.93 g m-2 and -0.79 to 0.75 g m-2, respectively, which can be attributed to the higher nutrient uptake of forage barley in SL-FC than in CL-FC. Consequently, the forage barley cultivation in SL-FC can potentially reduce nutrient leaching during the spring rainy season. Furthermore, nutrient balance can be reduced by cultivating forage crops during the winter season.

키워드

과제정보

This work was supported by the Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ01722104) and 2023 the Rural Development Administration Fellowship Program of National Institute of Agricultural Science, Rural Development Administration, Republic of Korea.

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