Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Comparative Study on Seed and Straw Productivity of Italian Ryegrass (Lolium multiflorum Lam.) 'GreenCall' According to Nitrogen Fertilization Level in Southern Region of Korea

남부지역에서 질소 시비량에 따른 이탈리안 라이그라스(Lolium multiflorum Lam.) '그린콜' 품종의 종자 및 짚 생산성 비교 연구

  • Young Sang Yu (Graduate School of International Agricultural Technology, SNU) ;
  • Li Li Wang (Research Institute of Eco-friendly Livestock Science, GBST, SNU) ;
  • Yan Fen Li (Graduate School of International Agricultural Technology, SNU) ;
  • Xaysana Panyavong (Graduate School of International Agricultural Technology, SNU) ;
  • Bae Hun Lee (Grassland and Forage Division, NIAS, RDA) ;
  • Jong Geun Kim (Graduate School of International Agricultural Technology, SNU)
  • 유영상 (서울대학교 국제농업기술대학원) ;
  • ;
  • ;
  • ;
  • 이배훈 (국립축산과학원 초지사료과) ;
  • 김종근 (서울대학교 국제농업기술대학원)
  • Received : 2024.04.03
  • Accepted : 2024.05.29
  • Published : 2024.06.30
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Abstract

The experiment was conducted to determine the changes in seed productivity of Italian ryegrass (Lolium multiflorum Lam.) according to nitrogen fertilization levels in the southern region of Korea. Italian ryegrass (IRG) variety 'Green Call' was sown in the fall of 2021 in Jinju, Gyeongsangnam-do. The experiment consisted of three nitrogen fertilizer levels (100, 120, and 140 N kg/ha) with three replications using a randomized complete block design. Harvesting was done approximately 30 days after heading on May 18th. There was no difference in heading date among treatments, which occurred on April 18th. The longest IRG was observed in the 140 N kg/ha treatment, but there was no significant difference. No significant differences were observed in lodging, disease resistance, and cold tolerance among treatments, but lodging was severe in all treatments. The length of the spike averaged 44.95 cm, with no difference among treatments, and the number of seeds per spike was highest in the 120 N kg/ha treatment. Seed yield increased with increasing nitrogen fertilizer levels, averaging 3,707 kg/ha (as-fed basis). DM content of seed and straw averaged 76.95% and 62.19%, respectively, with no significant differences among treatments. The remaining straw after harvesting averaged 6,525 kg/ha on a dry matter basis, with the highest value observed in the 140 N kg/ha treatment. Overall, considering the results, the optimal nitrogen fertilizer application rate for seed production of Italian ryegrass in the southern region when sown in autumn was found to be 120 N kg/ha.

본 시험은 남부지역에서 질소시비 수준에 따른 이탈리안 라이그라스의 종자 생산성 변화를 구명하기 위하여 수행되었다. 이탈리안 라이그라스(Lolium multiflorum Lam.) '그린콜' 품종을 2021년 가을에 경남 진주지역에 파종하였다. 처리는 3처리의 질소시비 수준(100, 120, 및 140 N kg/ha)을 두고 난괴법 3반복으로 수행하였다. 수확은 출수일로부터 약 30일째인 5월 18일에 하였다. 출수기는 4월 18일로 처리 간에 차이는 없었다. 초장은 140 N kg/ha구에서 가장 길었으나 유의적인 차이는 없었다. 내도복, 내병성 및 내한성은 처리간에 유의적인 차이가 나타나지 않았지만 전 처리구에서 도복이 심하게 발생하였다. 이삭의 길이는 평균 44.95 cm로 처리간 차이가 없었으며 이삭당 종자수는 120 N kg/ha 구에서 가장 많았다. 종자 수량은 질소시비 수준이 높아질수록 많았으며 평균 3,707 kg/ha(풍건기준)으로 나타났다. 종자 및 짚의 건물함량은 평균 76.95% 및 62.19%으로 나타났으며 처리간 유의적인 차이는 나타나지 않았다. 채종 후 남은 짚의 수량은 건물기준 평균 6,525 kg/ha로 나타났으며 140 N kg/ha구에서 높았다. 이상의 결과를 종합하여 볼 때 남부지역에서 가을 파종을 통한 이탈리안 라이그라스 종자생산 시 적정 질소비료 시용량은 120 N kg/ha 가 가장 유리한 것으로 나타났다.

Keywords

Acknowledgement

본 논문은 농촌진흥청 공동연구사업(과제번호 RS-2023-00228804)의 지원에 의해 이루어진 것이며, 이의 지원에 감사드립니다.

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