Weed & Turfgrass Science

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Effects of Cool-Season Grass Overseeding on Coverage and Spring Transition in Zoysiagrass

들잔디에 오버씨딩 시 한지형 잔디의 피복율과 초종전이

  • Jung, Ki-Wan (Dept. of Environmental Horticulture, Graduate School, Sahmyook University) ;
  • Kim, Kyoung-Nam (Dept. of Horticulture, College of Science and Technology, Sahmyook University)
  • 정기완 (삼육대학교 대학원 환경원예학과) ;
  • 김경남 (삼육대학교 과학기술대학 원예학과)
  • Received : 2014.11.17
  • Accepted : 2014.12.19
  • Published : 2014.12.31
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Abstract

Research was initiated to evaluate cool-season grass (CSG) overseeding effects on coverage and species transition in Korean lawngrass (Zoysia japonica Steud.) and to determine CSGs and their seeding rate for a practical overseeding. Treatments were comprised of Kentucky bluegrass (KB, Poa pratensis L.), perennial ryegrass (PR, Lolium perenne L.), tall fescue (TF, Festuca arundinacea Schreb.) and their mixtures. Significant differences were observed in turfgrass coverage and species transition. Since overseeding, the coverage was highest in PR, followed by TF and lowest in KB. The highest coverage in polystand was associated with Mixture IV (TF 50 + PR 50) at a seeding rate of $150gm^{-2}$ which had highest PR and TF, but without KB. Regarding turfgrass transition, zoysiagrass recovery continued to come back up to 80% from late March. But it reduced after early October. Zoysiagrass in monostand was greatest in KB and lowest in TF, but variable in polystand. For the fast and great coverage in winter, it would be the best to apply with PR at $100gm^{-2}$ and equal combination of PR and TF by 1/2 in the mixture at $150gm^{-2}$. For the smooth spring transition to zoysiagrass, however, KB application at $50gm^{-2}$ is recommended.

본 연구는 들잔디에 켄터키 블루그래스, 톨 페스큐 및 퍼레니얼 라이그래스를 단파 및 혼파로 오버씨딩 후 잔디피복율 및 초종전이 특성과 함께 적합한 초종 및 파종량을 구명함으로 실무에 활용할 수 있는 기초자료를 얻기 위해 수행하였다. 한지형 잔디 피복율 및 난지형 잔디의 초종전이는 처리구에 따라 통계적으로 유의한 차이가 나타났다. 피복율은 초기부터 퍼레니얼 라이그래스와 톨 페스큐 초종이 우수하였고, 켄터키 블루그래스가 저조하였다. 혼합구는 초종 구성상 퍼레니얼 라이그래스와 톨 페스큐가 많고 켄터키 블루그래스가 없는 파종량 150 g인 Mixture IV가 가장 양호하였다. 초종 전이는 3월 하순부터 지속적으로 진행되어 최대 80%까지 들잔디 점유율이 증가하였지만, 10월 초순 이후 점유율은 감소하였다. 단일 초종구에서 들잔디 점유율이 가장 높게 나타난 처리구는 켄터키 블루그래스이었고, 가장 낮게 나타난 처리구는 톨 페스큐이었으며, 혼합구의 경향은 일정하지 않았다. 본 실험을 통해 동절기 잔디피복에 적합한 처리구는 퍼레니얼 라이그래스 100 g, 혼합구인 경우 톨 페스큐 및 퍼레니얼 라이그래스가 1/2씩 혼합해서 150 g을 파종할 경우 가장 적합하였다. 하지만 들잔디로 초종전이는 단일 초종구인 켄터키 블루그래스 50 g이 가장 우수하였다.

Keywords

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