JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (2): 17-24.doi: 10.12302/j.issn.1000-2006.201911011

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Comparative study on the effects of nutrient solution treatment in hydroponic cultivation of Carpinus betulus

HUO Yan1(), ZHANG Huihui1, ZHU Zunling1,2,*()   

  1. 1. Co-Innovation Center for the Sustainable Forestry in Southern China, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
    2. College of Art and Design, Nanjing Forestry University, Nanjing 210037, China
  • Received:2019-11-11 Accepted:2020-12-21 Online:2021-03-30 Published:2021-04-09
  • Contact: ZHU Zunling E-mail:yanhuo@njfu.edu.cn;zhuzunling@njfu.edu.cn

Abstract:

【Objective】To provide a theoretical basis for hydroponic breeding, production, and further physiological and biochemical studies of Carpinus betulus, the effects of type, concentration and pH of ordinary nutrient solution treatment and special nutrient solution for hydroponic seedling growth of C. betulus were examined, and the best nutrient solution for the growth of C. betulus seedlings was screened.【Method】We used C. betulus hydroponic seedlings as the test material. We analyzed the survival rate, number of leaves, average number of roots, average number of second roots and fresh root weight as morphological indexes; and soluble sugar content, starch content, soluble protein content, POD activity and root activity as physical indexes. Hydroponic seedling growth was examined by the type, concentration and pH value of nutrient solution treatment using three factors and three level orthogonal tests. To obtain the best ordinary nutrient solution, we tested hydroponic seedling growth treated with the best ordinary nutrient solutions and special nutrient solutions made by the authors using a single factor test.【Result】The orthogonal test of nutrient solution showed that the most suitable ordinary nutrient solution was the 1/4 Hewitt formula (A3B3). In this condition of pH 6.5, the survival rate was 85.71%, the number of leaves was 1.60, the average number of roots was 4.40, the average number of second roots was 25.90, and the fresh root weight was 0.40 g. The soluble sugar content, starch content, soluble proteins content, and the rooting activity were significantly higher than those in the other treatments, although the POD activity was significantly lower than that in the other treatment. The single factor test of the nutrient solutions showed that the most suitable nutrient solution for C. betulus growth was the special nutrient solution No. 1. Under this condition, the survival rate was 93.33%, the soluble sugar content was 0.13 mg/g, the starch content was 2.55 mg/g, the soluble proteins content was 33.33 mg/g, and the rooting activity was 49.75 μg/(g·h).【Conclusion】The most suitable nutrient solution for C. betulus was the special nutrient solution No.1 prepared by us.

Key words: Carpinus betulus, hydroponic culture, nutrient solution, roots growth, soluble sugav content

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