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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

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.

Keywords

Cool-season grasss;Korean lawngrass;Turfgrass coverage;Turfgrass transition;Zoysiagrass recovery rate

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