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2021 Vol.54, Issue 2 Preview Page

Article

Study of Methodology Estimating the Net Nitrogen Balance for the Management of Regional Nutrient Balance
Jun-Hyeong Lee1
Jae Ho An2
Eulsaeng Cho3
Young-Man Yoon14*
1Ph.D. Candidate, Department of Plant Life and Environmental Science, Hankyong National University, Anseong 17579, Korea
2Professor, Department of Civil, Safety and Environmental Engineering, Hankyong National University, Anseong 17579, Korea
3Senior Research Fellow, Department of Land and Water Environment Research, Korea Environment Institute, Sejong 30147, Korea
4Professor, Biogas Research Center, Hankyong National University, Anseong 17579, Korea
*Corresponding Author
May 2021. pp. 174-192
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Abstract

The Ministry of Environment (ME) is promoting the introduction of the regional nutrient management system as the target year for 2021 in order to manage the amount of nutrients (nitrogen and phosphorus) input to agricultural land at an appropriate level. The nutrient balance of Korea has been reported to be 212 kg ha-1 of nitrogen and 46 kg ha-1 of phosphorus, and the nitrogen balance is at the highest level in the OECD member countries. Nutrient input to agricultural land is composed of inorganic fertilizers (chemical fertilizers), composted organic fertilizers (livestock manure compost, etc.), and organic fertilizers (oil meal fertilizers, etc.). Fertilizer application could be limited in the region which excess nutrients (nitrogen and phosphorus) have been loaded to agricultural land. Nutrient input to agricultural land have a beneficial function improving soil fertility and productivity of crops. However, excess nutrient input to agricultural land might have a drawback releasing non-point sources to water system such as river and lake. Therefore, it is necessary to consider both the environmental effect of reducing non-point contaminants due to the reduction of input nutrients in agricultural land and the agricultural production aspect of reducing agricultural productivity by setting the regional nutrient balance management goals. In this study, the methodology to estimate crop yield response according to regional nitrogen loading rate was established for the reasonable management of regional nitrogen balance and regional appropriate nitrogen balance index (net nitrogen balance) was estimated considering the affect of agricultural production. Based on our results, it was possible to understand the effect of regional nutrient management on agricultural production and the outflow of nutrients to water systems by methodology estimating the net nitrogen balance for the management of regional nutrient balance.

Regional classification for the nutrient balance management by NNB (net nitrogen balance).
Keywords
Crop yield response
Gross nitrogen balance
Net nitrogen balance
Nutrient loading rate
Soil budget
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Information
  • Publisher :Korean Society of Soil Science and Fertilizer
  • Publisher(Ko) :한국토양비료학회
  • Journal Title :Korean Journal of Soil Science and Fertilizer
  • Journal Title(Ko) :한국토양비료학회 학회지
  • Volume : 54
  • No :2
  • Pages :174-192
  • Received Date :2021. 02. 24
  • Revised Date :2021. 05. 31
  • Accepted Date : 2021. 05. 31
  • DOI :https://doi.org/10.7745/KJSSF.2021.54.2.174
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