Effects of Different Humic Acids on Growth and Fruit Quality of Tomato Plant

부식산 시용이 토마토의 생장과 과실품질에 미치는 영향

  • Kim, Hong-Gi (Dept. of Research and Development, Space Inc.) ;
  • Seo, Dong-Cheol (Wetland Biogeochemistry Institute, Louisiana State University) ;
  • Cheong, Yong-Hwa (Dept. of Bio-Environmental Science, Sunchon National University) ;
  • Kang, Chang-Sun (Product team, Namhae Chemical Co.) ;
  • Sohn, Bo-Kyoon (Dept. of Bio-Environmental Science, Sunchon National University) ;
  • Lee, Do-Jin (Dept. of Agricultural Education, Sunchon National University) ;
  • Kang, Jong-Gu (Dept. of Horticulture, Sunchon National University) ;
  • Park, Moon-Su (Dept. of Forest Resource, Sunchon National University) ;
  • Heo, Jong-Soo (Division of Applied Life Science, Gyeongsang National University) ;
  • Kim, Bong-Su (Dept. of Research and Development, Space Inc.) ;
  • Cho, Ju-Sik (Dept. of Bio-Environmental Science, Sunchon National University)
  • 김홍기 ((주)스페이스 연구개발부) ;
  • 서동철 (미국 루이지애나 주립대학 Wetland Biogeochemistry 연구소) ;
  • 정용화 (순천대학교 생명환경과학부) ;
  • 강창순 ((주)남해화학 중앙연구소) ;
  • 손보균 (순천대학교 생명환경과학부) ;
  • 이도진 (순천대학교 농업교육과) ;
  • 강종구 (순천대학교 원예학과) ;
  • 박문수 (순천대학교 산림자원조경학부) ;
  • 허종수 (경상대학교 농생명학부) ;
  • 김봉수 ((주)스페이스 연구개발부) ;
  • 조주식 (순천대학교 생명환경과학부)
  • Published : 2007.12.31


In greenhouse farming, a variety of humic acids have been applied to improve soil conditions and plant growth. However, it is still unclear that how humic acids combined with chemical fertilizers affect growth and quality of fruit vegetable crops. This study was conducted to determine the combination effect of humic acids and chemical fertilizers on the growth and fruit quality of tomato (Lycopersicon esculentum MILL.) grown under greenhouse conditions. Three different formulation types of humic acid were used: liquid type A, liquid type B and solid type C. The tomato plants were grown in three treatment combination plots and in conventional fertilizer (CF) plot with recommended levels of nitrogen, phosphorus and potassium: HA combined with CF (HA+CF), HB combined with CF (HB+CF) and HC combined with CF (HC+CF). For most of growth characteristics (i.e. leaf number, internode length, maximum leaf length, leaf width and chlorophyll contents) determined in this experiment, no significant differences were observed between all combination treatments and CF. However, integrated fruit qualities (i.e. averaged weight, sugar contents and acidity) were slightly improved in the humic acid combined with CF treatments when compared with CF alone treatment. No phytotoxicity was observed with humic acid treatments. However, further studies will probably be needed to use widely and safely these humic acids, in order to ensure a maximizing growth, fruit yield and quality of tomato.


humic acid;chemical fertilizer;conventional fertilizer;tomato


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