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Forest and Grassland Resources Research >

2019 , Vol. 0 >Issue 3: 118 - 123

DOI: https://doi.org/10.13466/j.cnki.lyzygl.2019.03.020

Scientific Research

Dynamic Effects of Root Pruning on Growth and Root Morphology in P.elliottii×P.caribaea Cuttings

  • Changming LIN ,
  • Guanming PENG ,
  • Zengyue HUANG ,
  • Ting HUANG ,
  • Wendou SITU ,
  • Zhen LI ,
  • Wenbing GUO ,
  • Fencheng ZHAO
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  • 1. Taishan Hongling Seed Orchard,Guangdong Jiangmen 529223
    2. Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization,Guangdong Academy of Forestry,Guangzhou 510520,China

Received date: 2019-03-26

  Revised date: 2019-04-25

  Online published: 2020-09-25

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Abstract

The container grown cuttings of P.elliottii×P.caribaea were cultured with air root pruning(RP) or without(control).The height of the raised bed were 30 cm,50 cm and 70 cm for the RP cuttings,respectively.The parameters including height,ground diameter,shoot biomass,root biomass,root length,root surface area,root diameter and fine root ratio,were monitored monthly within half a year.Although the root morphology was affected,no significant effects were found on cutting growth and biomass by root pruning.The root length was significantly increased in the RP cuttings at 70 cm-height bed 4 months after treatment.However,the root system of the RP cuttings changed from elongation to diameter growth.The fine root ratio decreased,and the root diameter increased compared to the control.The correlation between the growth and root diameter increased gradually,whereas the correlation between the growth and root length tended to decrease.It was implied that the changes in root morphology in RP cuttings would benefit the cutting growth.It is recommendes to use 70 cm-height bed for air root pruning for P.elliottii×P.caribaea cuttings.

Key words： P.elliottii×P.caribaea; air root pruning; ground diameter; container grown cuttings; adventitious roots

Cite this article

Changming LIN , Guanming PENG , Zengyue HUANG , Ting HUANG , Wendou SITU , Zhen LI , Wenbing GUO , Fencheng ZHAO . Dynamic Effects of Root Pruning on Growth and Root Morphology in P.elliottii×P.caribaea Cuttings[J]. Forest and Grassland Resources Research, 2019 , 0(3) : 118 -123 . DOI: 10.13466/j.cnki.lyzygl.2019.03.020

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