Effect of Mineral Nutrient Control on Nutrient Uptake, Growth and Yield of Single-Node Cutting Rose Grown in a Closed Hydroponic System

순환식 수경재배시 무기이온 조절이 Single-Node Cutting 장미의 양분흡수, 생육 및 품질에 미치는 영향

  • 양은영 (농촌진흥청 국립원예특작과학원 채소과) ;
  • 박금순 (국립종자관리원 서부지소) ;
  • 오정심 (서울시립대학교 환경원예학과) ;
  • 이혜진 (서울시립대학교 환경원예학과) ;
  • 이용범 (서울시립대학교 환경원예학과)
  • Published : 2008.12.31

Abstract

This study was conducted to observe the characteristics of mineral nutrient uptake of single-node cutting rose 'Versilla' and to determine optimal nutrient solution control method for soilless culture of 'Versilla' in a closed hydroponic system. Nutrient solution was managed by five different control methods: macro- and micro-element control in aeroponic system (M&M), macroelement control in aeroponic system (M), nutrient solution supplement in aeroponic system (S); electrical conductivity (EC) control in aeroponic system(EC-A); EC control in deep flow technique system(EC-D). The concentration of $NO_3$-N exceeds optimal range whereas P and Mg decreased at the later stage of plant growth with the EC control method, EC-A and EC-D. The overall mineral nutrient content increased with S. On the other hand the nutrient content at the root environment was maintained optimal with M&M and M. The nutrient solution control methods had significantly effect on the cut-flower quality. In the M&M and M, flower length, fresh weight and root activity were higher than those with the other mineral nutrients control methods. The maximal efficiency of photochemistry (Fv/Fm) was higher for M&M, M and S than that with EC-A and EC-D. Based on the above results, it is highly recommended to control nutrient solution by mineral nutrient control methods (M&M and M) in a closed hydroponic system for single-node cutting rose, 'Versillia'.

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