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

doi:10.7525/j.issn.1673-5102.2018.01.010

Abstract

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:

S792.24

YAO Xiao-Lan, ZHOU Lin, FENG Mao-Song, HAO Jian-Feng, RAO Yuan-Lin, YAO Jun-Yu, QI Jin-Qiu. Effects of Drought Stress on the Growth and Biomass of Phoebe zhennan'seedling in Different Substrates Net Container[J]. Bulletin of Botanical Research, 2018, 38(1): 81-90.

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