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植物研究 ›› 2023, Vol. 43 ›› Issue (6): 846-856.doi: 10.7525/j.issn.1673-5102.2023.06.007

• 生理与生态 • 上一篇    下一篇

不同修枝处理对10年生三倍体毛白杨生长和光合特性的影响

任天梦1, 鲍雨1, 苏亚勋2, 陈庆斌2, 魏立颖2, 纪若璇1, 于笑1, 夏新莉1, 尹伟伦1, 刘超1()   

  1. 1.北京林业大学生物科学与技术学院,北京 100083
    2.京蓝北方园林(天津)有限公司,天津 300000
  • 收稿日期:2023-02-22 出版日期:2023-11-20 发布日期:2023-11-08
  • 通讯作者: 刘超 E-mail:liuchao1306@bjfu.edu.cn
  • 作者简介:任天梦(1996—),男,硕士研究生,主要从事树木逆境生物学方面的研究。
  • 基金资助:
    国家重点研发计划课题(2016YFD0600403);国家自然科学基金(3170649);Foundation item:Key Research and Development Program Project(2016YFD0600403);国家自然科学基金项目(3170649)

Effects of Different Pruning Treatments on Growth and Photosynthetic Characteristics of 10-year-old Triploid Populus tomentosa

Tianmeng REN1, Yu BAO1, Yaxun SU2, Qingbin CHEN2, Liying WEI2, Ruoxuan JI1, Xiao YU1, Xinli XIA1, Weilun YIN1, Chao LIU1()   

  1. 1.College of Biological Sciences and Technology,Beijing Forestry University,Beijing 100083
    2.Jinglan North Pioneering Gardens Share Co. ,Ltd. ,Tianjin 300000
  • Received:2023-02-22 Online:2023-11-20 Published:2023-11-08
  • Contact: Chao LIU E-mail:liuchao1306@bjfu.edu.cn
  • About author:REN Tianmeng(1996—),male,postgraduate,mainly engaged in the research of tree stress biology.

摘要:

为探讨中高林龄杨树(Populus)光合生理特性对不同修枝强度的响应规律,以10年生三倍体毛白杨(triploid Populus tomentosa)无性系B301与S86为研究对象,采用轻度修枝(修去树冠下部1/3枝条)和重度修枝(修去树冠下部1/2枝条),以及未修枝杨树为对照,研究不同强度修枝对10年生毛白杨生长和生理特性的影响。结果表明:对于10年生中高龄杨树,修枝对树高、胸径、材积增长率无显著影响,但重度修枝能提高剩余叶片的净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs),增强单叶水平上物质合成的能力,而修枝对瞬时水分利用效率(WUE)影响不显著。从生长和光合角度综合分析,修去树冠下部1/2枝条能够改善10年生毛白杨生理状况,但对林木生长无明显促进作用。

关键词: 10年生, 三倍体毛白杨, 修枝, 林木生长, 光合特性

Abstract:

In order to explore the response of photosynthetic physiological characteristics to different pruning intensities in Populus of middle and high forest age, 10-year-old triploid Populustomentosa asexual lines B301 and S86 were used as materials, light pruning(pruning the lower 1/3 of the canopy) and heavy pruning(pruning the lower 1/2 of the canopy) and unpruned trees as the control were adopted respectively. The results showed that pruning had no significant effect on the growth rate of height, diameter at breast height and wood volume of 10-year-old Populus, but heavy pruning increased the net photosynthetic rate(Pn), transpiration rate(Tr), and stomatal conductance(Gs) of their remaining leaves and enhanced material synthesis at the single-leaf level, while pruning had no significant effect on instantaneous water use efficiency(WUE). From a comprehensive analysis of growth and physiology, pruning the lower 1/2 of the canopy could improve the physiological condition of 10-year-old Populus tomentosa, but had no significant effect on the growth of the stand.

Key words: 10-year-old, triploid Populus tomentosa, pruning, growth, photosynthetic characteristics

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