The growth characteristics of 2-year-old container seedlings of Phoebe zhennan cultured in different substrate formulas

doi:10.14088/j.cnki.issn0439-8114.2021.24.030

Abstract

Abstract: To optimize the 2-year-old container seedling process of Phoebe zhennan, yellow topsoil, river sand, vermiculite and rotten sawdust were selected as the substrate ingredients, and three different substrate treatments were designed by single factor randomized block design to survey the growth of basal diameter and seedling height of Phoebe zhennan container seedlings. Logistic equation, chanter equation, exponential equation and single molecule equation were used to fit the growth model of container seedlings cultured in different substrates. Critical weighting method was used to determine the weights of seedling growth and grading parameters and the evaluation indexes of container seedlings of Phoebe zhennan was established. The results showed that there were significant differences in basal diameter and seedling height between different substrate formulas and the CK; The growth tendency of basal diameter and seedling height of 2-year-old Phoebe zhennan container seedlings in different substrate formulas was multiple “fast-slow-fast-slow” in the growing process. The change trend of basal diameter and seedling height was basically consistent with the growth time at the seedling stage; Logistic model had the optimal goodness-of-fit on the growth dynamics of 2-year-old container seedlings of Phoebe zhennan. The ratio of height to diameterand and the qualified rate of grade I seedlings were the key factors for the evaluation of seedling or substrate formulas. The formula of 30% river sand + 70% loess was a low input and high output substrate formula for container seedling of Phoebe zhennan.

Key words: Phoebe zhennan, substrate formula, seedlings cultured in containers, growth characteristics

CLC Number:

S723.1⁺33

YANG Jie-feng, LUO Hai-bing, WANG Yang, HU Jian-min, XU Xiao-ting. The growth characteristics of 2-year-old container seedlings of Phoebe zhennan cultured in different substrate formulas[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(24): 124-129.

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