Effect of Slow-Release Fertilizer on Yield and Quality of Third-Harvest Tea Leaves

세물차의 수량 및 품질에 미치는 완효성비료 시비효과

  • Park, Jang-Hyun (Horticultural Research Division, Jeonnam Provincial Agriculture Research and Extension Service) ;
  • Choi, Hyeong-Kuk (Crops Research Division, Jeonnam Provincial Agriculture Research and Extension Service) ;
  • Kim, Jong-Keun (Horticultural Research Division, Jeonnam Provincial Agriculture Research and Extension Service) ;
  • Kim, Kil-Yong (Division of Applied Bioscience and Biotechnology, College of Agriculture, Jeonnam National University)
  • 박장현 (전남농업기술원 원예연구과) ;
  • 최형국 (전남농업기술원 작물연구과) ;
  • 김정근 (전남농업기술원 원예연구과) ;
  • 김길룡 (전남대학교 농업생명과학대학 응용생물공학부)
  • Received : 2005.07.05
  • Accepted : 2005.08.12
  • Published : 2005.10.30

Abstract

A field experiment was conducted to evaluate the effect of slow-release fertilizer on the yield and quality of the third-harvest tea leaves. The yield of the third harvested tea leaves was decreased to 5.8-14.4% in slow-release fertilizer block, except to the N $50kg\;10a^{-1}$ ($316kg\;10a^{-1}$), compared to traditional urea treatment ($313kg\;10a^{-1}$). Nitrogen uptake and nitrogen uptake efficiency of slow-release fertilizer was reduced as nitrogen application level increased. The contents of chemical components related to the tea quality such as total-nitrogen, total amino acid, chlorophyll and theanine were somewhat lower in the slow-release fertilizer treatments, except to the treatment of N $50kg\;10a^{-1}$, than those in the traditional urea application, but those of tannin, caffeine and vitamin C were not different among the treatments. In scoring test, apparence and quality of green tea of the slow-release fertility treatments were not different, except to the N $40kg\;10a^{-1}$ treatment, compared to those in the treatment of urea. In conclusion, slow-release fertilizer and conventional urea treatments showed not different in both yield and quality of green tea.

Keywords

Slow-release fertilizer;Nitrogen;Yield;Quality;Green tea

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