Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Effect of soil physical properties on nitrogen leaching during sesame (Sesamum indicum L.) cultivation under lysimeter conditions

  • Chan-Wook, Lee (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Jung-Hun, Ok (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Yang-Min, Kim (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Yo-Sung, Song (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Hye-Jin, Park (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Byung-Keun, Hyun (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Ye-Jin, Lee (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Taek-Keun, Oh (Departmet of Bio-Environmental Chemistry, College of Agriculture and Life Science, Chungnam National University)
  • Received : 2022.03.11
  • Accepted : 2022.05.30
  • Published : 2022.06.01
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Abstract

A large amount of the mineral nitrogen is necessary for crop growth. With the use of nitrogen fertilizers, agricultural yield has increased during the last few decades. However, at the same time, nitrate from the cultivated land can be a source of environmental pollution, especially in water systems. For nitrogen management, it is necessary to analyze the pattern of nitrogen movement in soil. In this study, nitrogen leaching in upland soils was evaluated using undisturbed lysimeters with different soil textures during sesame cultivation. The soil texture of the lysimeters was clay loam (Songjung series) and sandy loam (Sangju series) soils. Sesame was cultivated from May 25 to August 24 in 2020. The standard amount of NPK fertilizer (N-P2O5-K2O = 2.9-3.1-3.2 kg·10 a-1) was applied before sowing. The amount of nitrogen leaching was calculated by multiplying the nitrogen (NO3-N + NH4-N) concentration and the amount of water drained below 1.5 m soil depth. The water was drained through percolation into macropores in the clay loam lysimeter. In contrast, in the sandy loam lysimeter, water drained more slowly than in the clay loam lysimeter. There was a slight difference in the total amount of leachate during the cultivation period, but the amount of nitrogen leaching was high in sandy loam soil. During the sesame cultivation period, the amount of nitrogen leaching from clay soil was 5.64 kg·10 a-1, and 10.70 kg·10 a-1 for sandy soil. We found that there was a difference in leaching depending on the soil physical characteristics. Therefore, it is necessary to consider the characteristics of soil to evaluate the leaching of nitrogen.

Keywords

Acknowledgement

본 연구는 농촌진흥청(Rural Development Administration, Republic of Korea)의 연구사업(과제번호: PJ014262)의 지원에 의해 수행되었습니다.

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