Comparison of Germination Characteristics and Daily Seed Germinating Pattern in 15 New Cultivars of Kentucky Bluegrass Grown under Alternating Temperature Conditions

Abstract

서 론켄터키 블루그래스(Poa pratensis L.)는 북위 50도 유라 시아 지역이 원산지로서 현재 전 세계적으로 temperate 및 subartic 기후대에서 많이 사용되고 있는 대표적인 초종이 다 (Beard and Beard, 2005;Huff, 2003 and Gibbs, 1994;Hanson et al., 1969;Kim et al., 1998; KOWOC, 1999 o C). Significant differences were observed in germination characteristics and germination pattern among KB cultivars. A final germination percentage differed in cultivars, being 75.25 to 89.50%. The first germination was initiated between 6 and 9 DAS (days after seeding). As for the first germination percentage, 'Brilliant' and 'Midnight II' produced 14.50% and 23.00%, respectively, while the others were most below 5%. Days to 75% germination were between 15.08 and 28.80 DAS. 'Excursion', 'Midnight II', 'Odyssey', 'Midnight' and 'Courtyard' were fastest. The slowest cultivar was 'Voyager II', being over 28 DAS, which were 13 to 14 days slower than the fastest ones. Considering the first germination percentage, days to the first germination, days to 75% germination, and germination pattern, 'Midnight II', 'Excursion' and 'Midnight' were regarded as excellent cultivars under alternative conditions. From this study, information on differences in germination characteristics and patterns would be practically useful for a golf course construction when established with KB.

Comparison of Turfgrass Density, Uniformity and Tiller Characteristics in Mixtures of Overseeded Warm-Season and Cool-Season Grasses

“…(Park, 2003;Shim et al, 2004) (Skogley and Sawyer, 1992 (Steel and Torrie, 1980 (Thorogood, 2003;Turgeon, 2005). 주요 한지형 잔 디의 발아 실험에서 퍼레니얼 라이그래스는 파종 후 6일 만에 발아율이 75%에 도달하지만, 켄터키 블루그래스 초 종의 경우 발아율 75%는 15일 정도 소요되었다 (Kim, 2009;Kim and Jung, 2009;Kim, 2014) (Laude, 1964;Wallner et al, 1982;Fry and Huang, 2004). 특히 퍼레니얼 라이그래스는 켄터키 블 루그래스 및 톨 페스큐에 비해 내건성 및 내서성이 약해 하고현상으로 인해 고온기에 잔디밀도 저하가 더 크게 나 타나기 때문이다 (Wehner and Watschke, 1981;Miner et al, 1983;DiPaola and Beard, 1992;Beard and Beard, 2005).…”

Comparison of Seed Germinating Vigor, Germination Speed and Germination Peak in Kentucky Bluegrass Cultivars under Different Germination Conditions

“…Institute, 1998 (NTEP, 1994(NTEP, , 1996(NTEP, , 1997(NTEP, , 1998(NTEP, , 1999(NTEP, , 2000(NTEP, , 2001(NTEP, , 2002. 하지만, 국내 기후 조 건에서 켄터키 블루그래스를 이용한 연구 (Lee et al, 2001a(Lee et al, , 2001bShim et al, 2000;Shim and Jeong, 2002) (Kim, 2014a(Kim, , 2014b (Beard, 1973;Turgeon, 2005). (Kim, 2013b;Watschke and Schmidt, 1992…”