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Growth Response of Zoysiagrass (Zoysia japonica Steud.) as Affected by Nitrogen Fertilizer Application Rate

질소비료 시비량에 따른 들잔디의 생육반응

  • Bae, Eun-Ji (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Han, Jeong-Ji (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Lee, Kwang-Soo (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Park, Yong-Bae (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Choi, Su-Min (Southern Forest Resources Research Center, National Institute of Forest Science)
  • 배은지 (국립산림과학원 남부산림자원연구소) ;
  • 한정지 (국립산림과학원 남부산림자원연구소) ;
  • 이광수 (국립산림과학원 남부산림자원연구소) ;
  • 박용배 (국립산림과학원 남부산림자원연구소) ;
  • 최수민 (국립산림과학원 남부산림자원연구소)
  • Received : 2015.10.15
  • Accepted : 2015.11.25
  • Published : 2015.12.30

Abstract

This study was conducted to find out the optimum nitrogen fertilization for production of good quality and high yield zoysiagrass (Zoysia japonica Steud.), the changes in chemical properties of soil in pot and field experiments treated with different levels of nitrogen fertilizer. In pot experiment, the fresh and dry weights of shoots and stolons and the number of shoots increased as nitrogen levels increased, and showed no significant between 24 and $48kg\;N\;10\;a^{-1}$. In field experiment, the shoot length, fresh and dry weights of shoots, roots and stolons, the number of shoots and total stolons length linearly increased as affected by increased nitrogen application, and were not significantly different between 24 and $32kg\;N\;10\;a^{-1}$. In both experiments, pH and exchangeable cations ($Ca^{2+}$ and $Mg^{2+}$) in soil decreased as the rate of nitrogen application increased. As a results, chemical properties of soil were more deteriorated in the plots of higher nitrogen fertilizer rate. Thus, these results demonstrated that the nitrogen fertilizer rate for maximum growth of zoysiagrass was $24kg\;N\;10\;a^{-1}$ in consideration of growth and soil condition.

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