Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (9): 1803-1807.DOI: 10.3969/j.issn.1000-2561.2020.09.012

• Plant Cultivation, Physiology & Biochemistry • Previous Articles     Next Articles

Effects of Rooting Plant Growth Regulators on Rooting of Air-layers of Phoebe bournei

ZHENG Yupan1,2,YANG Jinchang1,ZOU Wentao1,WANG Xu1,YU Niu1,LIU Xiaodong3,LAI Xuen3,LI Rongsheng1,*()   

  1. 1. Research Institute of Tropical Forestry, Chinese Academy of Forestry / Key Laboratory of National Forestry and Grassland Administration on Tropical Forestry Research, Guangzhou, Guangdong 510520, China
    2. Nanjing Forestry University, Nanjing, Jiangsu 210037, China
    3. Longshan Forest Farm of Lechang, Lechang, Guangdong 512221, China
  • Received:2019-10-22 Revised:2019-12-25 Online:2020-09-25 Published:2020-10-16
  • Contact: LI Rongsheng

Abstract:

Phoebe bournei is a precious and endemic tree cultivated in China. To explore the effects of growth regulators on rooting of P. bournei, research was conducted with different concentrations by a randomly complete block design. Single root stimulator, i.e., indole acetic acid (IAA), indole-3-butyric acid (IBA) and naphthalene acetic acid (NAA), and mixed root stimulators namely ABT1#rooting powder were applied to the 6-year-old branches. NAA was the optimum auxin for rooting of the air-layered branches, and the branches treated with 1000 mg/L had the highest rooting rate of 54.67%. For ABT1# rooting powder consisted of IBA and NAA, 1000 mg/L was the optimal concentration, and the maximum first-order root length and root biomass of the air-layered branches at the concentration were better than that of the control. It is concluded NAA or ABT1# rooting powder was recommended to be applied at the level of 1000 mg/L in the air layering for saplings of P. bournei.

Key words: Phoebe bournei, air layering, ABT1# rooting powder, IAA, IBA, NAA

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