Weed & Turfgrass Science

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Comparison of Germination Characteristics and Daily Seed Germinating Pattern in 15 New Cultivars of Kentucky Bluegrass Grown under Alternating Temperature Conditions

변온조건에서 켄터키 블루그래스 신품종 15종류의 발아특성 및 일일 발아패턴 비교

  • Kim, Kyoung-Nam (Dept. of Horticulture, College of Science and Technology, Sahmyook University)
  • 김경남 (삼육대학교 과학기술대학 원예학과)
  • Received : 2014.02.26
  • Accepted : 2014.03.25
  • Published : 2014.03.31
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Abstract

Research was initiated to investigate early establishment characteristics and germination pattern of Kentucky bluegrass (KB, Poa pratensis L.). Fifteen cultivars were evaluated under alternative conditions (8 hours light at $25^{\circ}C$ and 16 hours dark at $15^{\circ}C$). 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.

본 연구는 켄터키 블루그래스의 발아특성 및 발아패턴을 파악하고자 시작하였다. 공시재료는 국내에서 최근 많이 이용되고 있는 15 종류의 신품종을 이용하였으며, 발아실험은 변온조건에서 수행하였다. 켄터키 블루그래스 종자의 발아율, 발아패턴 및 발아특성은 품종에 따라 유의한 차이가 나타났다. 최종 발아율은 75.25-89.50% 사이로 품종 간 최대 14.25% 정도 차이가 나타났다. 켄터키 블루그래스는 치상 후 6-9일 사이에 발아가 시작되었으며 품종 간 최대 3일 정도의 차이가 나타났다. 최초 발아율은 0.25-23.00% 사이로 품종 간 차이가 컸지만, 대부분 5%이내였다. 하지만 'Brilliant' 및 'Midnight II' 품종은 각각 14.50% 및 23.00%로 최초 발아율이 대단히 왕성한 품종이었다. 켄터키 블루그래스 종자의 기준 발아율인 75% 도달기간은 치상 후 15.08-28.80일 사이였다. 기준발아율 도달기간이 가장 빠른 종류는 'Excursion', 'Midnight II', 'Odyssey', 'Midnight' 및 'Courtyard' 품종이었고, 가장 느린 품종은 28.80일로 나타난 'Voyager II' 품종이었다. 'Voyager II' 품종의 발아 특성은 가장 우수한 품종군에 비해 각각 13-14일 정도 느린 것이었다. 종합적으로 발아특성 및 발아패턴의 결과를 고려할 때 'Midnight II', 'Excursion' 및 'Midnight' 품종이 가장 우수한 것으로 판단되었으며, 품종 간 이러한 발아특성 비교 데이터는 골프장 등 잔디밭 조성 시 실무적인 기초 자료로 유용하게 활용될 수 있을 것이다.

Keywords

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