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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (1): 81-90.doi: 10.7525/j.issn.1673-5102.2018.01.010

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Effects of Drought Stress on the Growth and Biomass of Phoebe zhennan'seedling in Different Substrates Net Container

YAO Xiao-Lan1, ZHOU Lin1,4, FENG Mao-Song1, HAO Jian-Feng1,2, RAO Yuan-Lin1, YAO Jun-Yu1, QI Jin-Qiu1,3   

  1. 1. College of Forestry, Sichuan Agricultural University, Chengdu 611130;
    2. Key Laboratory for Soil and Water Conservation and Desertification Control, Chengdu 611130;
    3. Wood Industry and Furniture Engineering Sichuan Provincial Colleges and Universities Key Laboratory, Chengdu 611130;
    4. Liangshan Forestry Survey and Planning Institute, Xichang 615000
  • Received:2017-06-07 Online:2018-01-15 Published:2018-01-06
  • Supported by:
    This work was supported by the Seedling Program in 2015 science and Technology Department (035Z1305); General Project of Department of Education in Sichuan Province (Natural Science,15ZB0020);National Natural Science Foundation of China (31370628);Double Support Plan in Sichuan Agricultural(03571838)

Abstract: Adaptability and survival strategy of Phoebe zhennan in different substrates under periodic drought stress were studied to provide a reference for substrate selection of seedling cultivation to combat drought stress. According to the volume ratio, the seedlings of P.zhennan were cultured on five different substrates: T1: cultivated soil=10, T2: forest humus=10, T3: cultivated soil:forest humus:peat soil:pearlite=4:3:2:1, T4: cultivated soil:forest humus:peat soil:pearlite=3:2:4:1, T5: cultivated soil:forest humus:peat soil:pearlite=2:1:6:1. The drought stress gradients were designed randomly to study the effects of drought stress on the growth of P.zhennan seedling. The results were: (1)The physical and chemical properties of different substrates composition were closely related to the seedling growth and the seedling exhibited better growth performance in the substrates than traditional seedlings, but only T3 and T4 had better growth under heavy stress. (2)Along with the increase of the drought stress, the seedling height, basal diameter, leaf area, leaf area index, above ground biomass and underground biomass were aggravated, but the degree of influence was different. (3)The membership function value of the seedling quality was T3 >T4=T1 >T2 >T5, and T3 had the best quality and a strong tolerance of seedling to adapt to drought stress, improving the effectiveness of afforestation significantly. The suitable ratio of light substrates could coordinate the water, fertilizer, gas and heat, being propitious to the growth of the seedling in adversity.

Key words: cultivation seedling in substrates net container, drought stress, Phoebe zhennan, seedling growth

CLC Number: