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Biomass Chemical Engineering ›› 2021, Vol. 55 ›› Issue (2): 31-37.doi: 10.3969/j.issn.1673-5854.2021.02.005

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Effect of Chemical and Biological Compound Tapping Irritant Agent on Resin-increasing and Physical Indexes of Pinus yunnanensis

Ruiling WANG1,2(), Xiangyi LIU1,3, Jianxiang LIU1,4, Chunhua WU1,3,*()   

  1. 1. Key Laboratory of National Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Kunming 650224, China
    2. School of Forestry, Southwest Forestry University, Kunming 650224, China
    3. School of Chemical Engineering, Southwest Forestry University, Kunming 650224, China
    4. School of Ecology and Environmental Engineering, Southwest Forestry University, Kunming 650224, China
  • Received:2020-04-15 Online:2021-03-30 Published:2021-03-23
  • Contact: Chunhua WU E-mail:434745585@qq.com;906072220@qq.com

Abstract:

The chemical tapping irritant agent with rare earth as the main component and two biological tapping irritant agents including Ethephon and α-naphthylacetic acid were applied in the experiment of increasing resin of Pinus yunnanensis. The effects of increasing resin were good, and the average increasing resin rates were 31.48% and 20.20%, respectively. The mass fraction of turpentine in resin increased by 24.6%, and the quality of resin improved. The physiological indexes of Pinus yunnanensis treated with tapping irritant agent were tested. The results showed that the maximum value of fresh weight and dry weight increased by 34.57% and 37.89%, respectively. The contents of chlorophyll, soluble sugar and soluble protein also increased, the maximum improvement rates were 59.94%, 25.88% and 42.85%, respectively. The activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) of Pinus yunnanensis increased with the maximum increments of 178.38%, 137.60% and 43.22%. These enzymes could help to improve cold tolerance and environmental adaptability of plants, reduce the content of malondialdehyde (MDA), with the maximum decrease rate of 36.91% to ensure the stability of plant cells, and promote resin increasing.

Key words: Pinus yunnanensis, tapping irritant agent, peroxidase, superoxide dismutase, physical indexes

CLC Number: