내한 조숙성 이탈리안 라이그라스 신품종 '코그린'

Abstract

본 시험은 이탈리안 라이그라스 내한성 품종을 육성하기 위하여 1999년부터 2005년까지 축산연구소 조사료자원과에서 수행되었다. 이탈리안 라이그라스 신품종 '코그린'은 2배체 품종으로서 엽의 색은 녹이며, 월동전 초형은 반직립형, 봄의 초형은 직립형이다. 코그린은 5월 4일경에 출수하는 조숙성 품종이었다. 특히, '코그린'은 'Florida 80' 보다 지엽의 폭이 0.7mm, 지엽의 길이가 2cm로 넓고 길며, 초장은 85m로 Florida 80 보다 1cm 정도 작았다. 줄기의 두께는 'Florida 80'과 같이 중간이었다. '코그린'의 내한성은 'Florida 80' 보다 강한 품종이었다. '코그린'의 건물수량은 12.884kg/ha로서 'Florida 80' 보다 3% 적었다. '코그린'의 사료가치는 in vitro 소화율이 74.7%, 가소화영양분총량(TDN) of 65.1%로서 'Florida 80' 보다 각각 3.6, 1.5% 높았고, 산성세제불용섬유(ADF)와 중성세제불용섬유(NDF)는 30.1 및 54.1%로서 'Florida 80' 보다 각각 1.9 및 1.3% 낮았다. This experiment was carried out to breed the cold-tolerant variety of Italian ryegrass (Lolium multiflorum Lam.) at the Grassland and Forage Crops Division, National Livestock Research Institute, RDA at Suwon, Korea, from 1999 to 2005. The new variety 'Kogreen' is a diploid variety with a green leaf color and had semi-erect habit in late autumn and erect growth habit in early spring. The heading date of 'Kogreen' was on May 4, and for 'Florida 80' was May 2, both are considered as early-heading variety. 'Kogreen' was wider by 0.7mm in flag leaf width, longer by 2 cm in flag leaf length and shorter by 1cm in plant length than the control variety, Florida 80. Stem width of 'Kogreen' was similar to that of 'Florida 80' and 'Hwasan 101'. cold tolerance of 'Kogreen' was better than that of 'Florida 80'. Dry matter(DM) yield (12,884kg/ha) of 'Kogreen' was 3% less than that of 'Florida 80'. in vitro dry matter digestibility was 74.7% and total digestible nutrient was 65.1%, which are 3.6% and 1.5% higher than those of 'Florida 80', respectively. Acid detergent fiber and neutral detergent fiber of 'Kogreen' were 30.1% and 54.1% which are 1.9% and 1.3% lower than those of 'Florida 80', respectively.