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2025 Vol.70, Issue 1 Preview Page

Original Research Article

Optimal Cutting Height of Rye and Hairy Vetch on Nitrogen Yield in Saemangeum Reclaimed Land

새만금간척지에서 풋거름작물 호밀과 헤어리베치의 예취 높이가 질소 생산량에 미치는 영향

Young-Tae Shin1
,
Hyeoun-Suk Cho2*
,
Kwang-Seung Lee3
,
Bang-Hun Kang2
,
Hak-Sung Lee3
,
Hyeon-Soo Jang3
,
Hee-Kyung Ock3
,
Seo-Young Jeong3
신 영태1
,
조 현숙2*
,
이 광승3
,
강 방훈2
,
이 학성3
,
장 현수3
,
옥 희경3
,
정 서영3
1Professional Researcher, Reclaimed Agriculture Research Team, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea
2Senior Researcher, Reclaimed Agriculture Research Team, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea
3Researcher, Reclaimed Agriculture Research Team, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea
1농촌진흥청 국립식량과학원 전문연구원
2농촌진흥청 국립식량과학원 농업연구관
3농촌진흥청 국립식량과학원 농업연구사
*Corresponding Author
1 March 2025. pp. 34-39
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Abstract

The soil of the Saemangeum reclaimed land is characterized by higher sand (>70%) and lower clay and organic matter than that of agricultural lands. This often creates an unfavorable environment for crop production. Therefore, green manure crops cultivated during the winter season could be one of the recommended practices to improve soil physiochemical properties and supply nitrogen for subsequent crops. The objective of this study was to determine the optimal cutting height of green manure crops as a countermeasure to compensate for the nitrogen requirement of soybeans under a green manure crop–soybean cropping system in Saemangeum reclaimed land. Rye (R100), hairy vetch (H100), and mixture (R50/H50) were cut at 10 cm intervals from the ground, and nitrogen productivity was estimated at different cutting heights. The results indicated that R100 exhibited the highest biomass production, while H100 showed the highest nitrogen content. The cumulative nitrogen production increased with cutting height in the mixed cultivation system (R50/H50), which was the greatest among the treatments. However, the relatively lower nitrogen content of green manure crops grown on Saemangeum reclaimed land compared to that of general field cultivation resulted in a marked reduction in total nitrogen productivity. Cutting rye and hairy vetch at a height of more than 30 cm in mixed cultivation might support at least 20% of the nitrogen requirement for soybean production. However, whole incorporation resulted in the greatest nitrogen supply. This study provides a valuable agronomic practice for establishing effective green manure crop management on Saemangeum reclaimed land.

Keywords
rye
hairy vetch
mixture
nitrogen yield
cutting height
Saemangeum
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 70
  • No :1
  • Pages :34-39
  • Received Date : 2024-11-18
  • Revised Date : 2024-12-05
  • Accepted Date : 2024-12-07
  • DOI :https://doi.org/10.7740/kjcs.2025.70.1.034
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