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Forest and Grassland Resources Research ›› 2024›› Issue (2): 80-91.doi: 10.13466/j.cnki.lczyyj.2024.02.010

• Technical Application • Previous Articles     Next Articles

Effect of Substrates and Exogenous Hormone on the Rooting of Air Layering of Berchemia floribunda(Wall.)Brongn.

ZHAO Tian1(), WANG Yinchen1, ZHOU Sixuan1, ZENG Bing3, YUAN Yang1, DENG Mengqing1, LIAO Yan1, ZHANG Jinhua3()   

  1. 1. Institute of Animal Husbandry and Veterinary Medicine,Guizhou Academy of Agricultural Sciences,Guiyang 550002,China
    2. Institute of Prataculture,Academy of Agricultural Sciences,Guiyang 550025,China
    3. College of Animal Science and Technology,Southwest University,Chongqing 402460,China
  • Received:2023-12-26 Revised:2024-01-18 Online:2024-04-28 Published:2024-09-02

Abstract:

Berchemia floribunda(Wall.)Brongn.is a traditional precious tree species in China with functions as a nectar source,ornamental and medicinal source,and has good ecological and economic benefits.In order to optimize the optimal conditions for B.floribunda air layering propagation and to improve the vegetative propagation technology,the L9(34)orthogonal matrix experiment was performed to explore the effects of different substrate ratios,exogenous hormone types,exogenous hormone concentration and girdle width on rooting of its air layering,subordination function method and correlation analysis method were used to comprehensively evaluate various rooting indices,and the mechanism of these four factors on rooting explored.The results showed that a suitable substrate and exogenous hormone ratio can promote the formation of callus,along with an increase in various rooting indices.Variance analysis and range analysis indicated that the efficiency of air layering was affected by the substrate ratio,exogenous hormone and girdle width,substrates ratio and exogenous hormone types were the two most important factors.Based on a comprehensive evaluation and correlation analysis,it is concluded that the most favorable treatment condition for B.floribunda rooting is:perlite+peat+vermiculite(1∶1∶1)as substrates,NAA is used as an exogenous hormone types with a concentration of 400 mg/L,and the girdle width is 10 mm.Under this treatment,the callus induction rate is as high as (93.33±2.36)%,and the rooting rate is as high as(85.00±4.08)%,(9.67±0.47)days to form a callus at the wound site,(14.00±0.82)days start to take root,average number of first order roots[(15.44±0.51)roots],average length of first order roots[(7.13±0.25)cm],average diameter of first order roots[(3.03±0.21)mm],fresh weight[(3.29±0.05)g],dry weight[(0.67±0.04)g],root effect index(5.50±0.06),average subordinate function value(0.77)were the highest.The results of this study provide theoretical references and data support for establishing a rapid propagation system of B.floribunda and promoting its cultivation.

Key words: Berchemia floribunda(Wall.)Brongn., air layering, rooting, substrates, exogenous hormone, orthogonal experiment

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