Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
권호 표지

Effect of Application Rate of a Slow-release Fertilizer in Three Media Containing Polyacrylic Acid Sodium Salt on Growth and Nutrient Contents of Potted Chrysanthemum 'Lima Honey'

Polyacrylic Acid Sodium Salt를 혼합한 세 종류 상토에 지효성 비료의 시비 수준이 포트-멈 'Lima Honey'의 생육과 무기원소 흡수에 미치는 영향

  • Choi Jong-Myung (Division of Horticulture & Landscape Architecture, Pai Chai University) ;
  • Wang Hyun-Jin (Department of Horticulture, Chungnam National University)
  • Published : 2006.03.01
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Abstract

Objective of this research was to determine the effect of application rate of a slow release fertilizer (SRF) in three root media, peatmoss+vermiculite (1:1, v/v; PV), peatmoss+composted rice hall (1:1, v/v; PR), and peatmoss+composted pine bark (1:1, v/v; PB), on growth and nutrient contents of potted chrysanthemum 'Lima Honey'. All media contained polyacrylic acid sodium salt at a rate of $4.5g L^{-1}$. The fresh and dry weights at 43 days after transplanting did not show statistical differences among treatments in each root media. Elevated application rate of SRF increased fresh and dry weights at 80 days after transplanting in PV and PB media, but not in PR medium. Elevated application rates of SRF resulted in the increase of tissue phosphorus content and decrease of tissue Ca, Na, and Zn contents at both 43 and 80 days after transplanting. Elevated application rates of SRF resulted in the decrease of pH and increase of EC and concentrations of ${NO_3}^-$ and ${P_2O_5}^{3-}$, K, Ca, and Mg in the soil solution of PV and PR media. The trends of those in PR media were also similar except ${NO_3}^-$. The differences among treatments in EC at 80 days after transplanting were less significant as compared to those at 43 days after transplanting in three media.

Keywords

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