Effects of Different Hormone Types and Concentrations on Softwood Cutting Propagation of <i>Calophyllum inophyllum</i>
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Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (11): 2183-2189.DOI: 10.3969/j.issn.1000-2561.2020.11.006

• Germplasm Resources, Genetics & Breeding • Previous Articles     Next Articles

Effects of Different Hormone Types and Concentrations on Softwood Cutting Propagation of Calophyllum inophyllum

ZHANG Yangfeng1,REN Zheng2,LIN Mingping3,CAI Weijing3,SHI Guozheng3,YU Bin3,*()   

  1. 1. Guangdong Forestry Survey and Planning Institute, Guangzhou, Guangdong 510520, China
    2. Guangdong Shunde East New Town Investment Development Co., Ltd., Shunde, Guangdong 528300, China
    3. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou, Guangdong 510520, China
  • Received:2019-11-25 Revised:2020-02-10 Online:2020-11-25 Published:2020-12-23
  • Contact: YU Bin

Abstract:

The effects of different hormone types and concentrations, 1-naphthylacetic acid (NAA), 3-indolebutyric acid (IBA) and ABT-1 rooting powder (ABT) on the leaf-growing and rooting characteristics were studied on the softwood cuttings of Calophyllum inophyllum. A comprehensive evaluation was given based on membership function. The results showed compared with the control, different hormone types and concentrations significantly affected leaf sprout rate, new leaf number, new leaf area, rooting rate, partial root rate, adventitious root number, adventitious root number, lateral root number and lateral root length, but had no significant effects on the leaf retention rate. Under different hormone treatment, the leaf sprout rate and rooting rate of cuttings was 21.7% to 66.7% and 43.3% to 98.3%, respectively, while the leaf sprout rate and rooting rate of control treatment were 0. Based on the comprehensive analysis of membership function method, the promoting effect of hormones on cutting was NAA>ABT>IBA. The average leaf sprout rate and rooting rate of the cuttings treated with NAA were 62.1% and 95.4%, respectively increased by 47.5% and 30.2% compared with the treatments of ABT, and increased by 62.0% and 57.9% compared with the treatments of IBA. 1000 mg/L of NAA was the best combination for the softwood cuttings of C. inophyllum, while the leaf sprout rate was 61.7% and the rooting rate was 95.0%.

Key words: Calophyllum inophyllum, leaf-growing characteristic, rooting characteristic, membership function method

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