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

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Growth Characteristics and Yield of a New Italian Ryegrass (Lolium Multiflorum Lam.) Variety, 'Earlybird'

이탈리안 라이그라스 신품종 '얼리버드'의 생육특성과 수량성

  • Jae Hoon Woo (Grassland and Forage Division, National Institute of Animal Science, RDA) ;
  • Bo Ram Choi (Grassland and Forage Division, National Institute of Animal Science, RDA) ;
  • Chang-Woo Min (Grassland and Forage Division, National Institute of Animal Science, RDA) ;
  • Ki-Won Lee (Grassland and Forage Division, National Institute of Animal Science, RDA)
  • 우제훈 (국립축산과학원 초지사료과) ;
  • 최보람 (국립축산과학원 초지사료과) ;
  • 민창우 (국립축산과학원 초지사료과) ;
  • 이기원 (국립축산과학원 초지사료과)
  • Received : 2024.06.20
  • Accepted : 2024.06.26
  • Published : 2024.06.30
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Abstract

This experiment was conducted to breed a very early-maturing variety of Italian ryegrass (Lolium multiflorum Lam.) at the Grassland and Forage Crops Division, National Institute of Animal Science, RDA, Cheonan, Korea, from 2022 to 2023. The new variety, named "Earlybird," is a diploid variety characterized by green leaf color, a semi-erect growth habit in late autumn/fall, and an erect growth habit in early spring. With a heading date of April 30, Earlybird is categorized as a very early-maturing variety. Compared to the "Kowinearly" control variety, Earlybird's flag-leaf width is wider by 0.2 mm, its flag-leaf length is longer by 1.4 cm, and its plant height is greater by 10.5 cm. Additionally, Earlybird's ear length is 1.4 cm longer than Kowinearly's, and it exhibits lodging resistance. Although the dry matter yield of Earlybird (7,469 kg/ha) is smaller than that of Kowinearly, the difference is not statistically significant. The total digestible nutrient and crude protein content of Earlybird are 63.5% and 8.6%, respectively, which are higher than those of Kowinearly by 1.8% and 0.3%, respectively. The neutral detergent fiber and acid detergent fiber content of Earlybird are 56.9% and 32.0%, respectively, which are lower than those of Kowinearly by 2.2% and 2.3%, respectively.

본 시험은 생산성이 우수하고 답리작에 적합한 극조생종 이탈리안 라이그라스 품종을 육성하기 위하여 2022년부터 2023년까지 농촌진흥청 국립축산과학원 초지사료과에서 수행되었다. 신품종 이탈리안 라이그라스 '얼리버드'는 2배체 품종으로, 엽색은 녹색이고, 월동 전 초형은 반직립형, 봄의 초형은 직립형이다. 출수기가 4월 30일경인 '얼리버드'는 대비품종인 '코윈어리'보다 3일 빠른 극조생종으로, 출수기의 초장은 97.2cm 정도였다. '얼리버드'의 출수기 지엽폭과 지엽 길이는 각각 9 mm, 19.6 cm로, 대조품종인 '코윈어리'보다 각각 2 mm 두껍고 1.4 cm 길었다. 출수기 초장은 '코윈어리'보다 9 cm 정도 긴 97 cm였다. 또한, '얼리버드'의 이삭 길이는 25.9 cm로 '코윈어리'보다 1.6 cm 길었다. 엽색은 녹색에 속하였다. 결론적으로 '얼리버드'는 출수기가 빨라서 우리나라 중부 및 남부지역에서 답리작 재배를 할 때 벼 이앙 시기 문제 없이 수확이 가능하며, 옥수수와 수수류와 작부체계에 활용할 때도 기존 품종보다 유리할 것으로 사료된다.

Keywords

Acknowledgement

본 성과물은 농촌진흥청연구사업(과제명: 다수확 사료작물 신품종 개발 및 생산성 평가, 과제번호: PJ01669901)의 지원에 의해 이루어진 것임.

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