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    阎雄飞, 曹存宏, 袁小琴, 张增强, 郭荣, 陈巧燕, 刘永华. 截冠处理对种子园樟子松壮龄母树结实的影响[J]. 北京林业大学学报, 2019, 41(8): 48-56. DOI: 10.13332/j.1000-1522.20190178
    引用本文: 阎雄飞, 曹存宏, 袁小琴, 张增强, 郭荣, 陈巧燕, 刘永华. 截冠处理对种子园樟子松壮龄母树结实的影响[J]. 北京林业大学学报, 2019, 41(8): 48-56. DOI: 10.13332/j.1000-1522.20190178
    Yan Xiongfei, Cao Cunhong, Yuan Xiaoqin, Zhang Zengqiang, Guo Rong, Chen Qiaoyan, Liu Yonghua. Effects of top pruning on seed setting of aged mother trees in orchard of Pinus sylvestris var. mongolica[J]. Journal of Beijing Forestry University, 2019, 41(8): 48-56. DOI: 10.13332/j.1000-1522.20190178
    Citation: Yan Xiongfei, Cao Cunhong, Yuan Xiaoqin, Zhang Zengqiang, Guo Rong, Chen Qiaoyan, Liu Yonghua. Effects of top pruning on seed setting of aged mother trees in orchard of Pinus sylvestris var. mongolica[J]. Journal of Beijing Forestry University, 2019, 41(8): 48-56. DOI: 10.13332/j.1000-1522.20190178

    截冠处理对种子园樟子松壮龄母树结实的影响

    Effects of top pruning on seed setting of aged mother trees in orchard of Pinus sylvestris var. mongolica

    • 摘要:
      目的樟子松是我国北方干旱和半干旱沙区水土保持和防风固沙的重要树种。研究截冠处理对种子园壮龄樟子松母树结实的影响,以期为樟子松种子园母树的优质高产和科学管理提供理论依据。
      方法本研究以陕西省榆林市樟子松种子园18个无性系樟子松24年生的母树为研究对象,比较分析未截冠与截冠处理对樟子松母树球果产量、种子产量、球果大小和种子质量等8个指标的影响。
      结果结果表明,截冠处理对樟子松母树单果质量和单株球果质量2个指标影响不显著,但其平均增益值分别达到24.84%和23.82%,说明截冠处理在一定程度上能提高樟子松壮龄母树的球果产量。截冠处理对樟子松母树单株种子质量和出籽率有明显影响,截冠后单株种子质量和出籽率的平均增益值分别达到81.38%、55.94%,说明截冠处理能提高壮龄母树种子产量。截冠处理对球果长径和短径均无明显影响,截冠处理后球果长径和短径的平均增益值分别为− 0.25%和1.37%。截冠处理后樟子松母树的种子千粒质量、优良度平均增益值分别达7.43%、24.96%,并且大部分无性系千粒质量为正增益,全部无性系优良度为正增益;截冠处理对种子千粒质量无明显影响,但对种子优良度有明显影响。说明截冠处理能提高樟子松壮龄母树种子的质量。
      结论研究证明截冠处理可以提高樟子松壮龄母树的产量和种子质量。

       

      Abstract:
      ObjectiveMongolian pine (Pinus sylvestris var. mongolica) is one of the important tree species for soil and water conservation and windbreak and sand fixing in arid and semi-arid sandy areas of northern China. Effects of top pruning on seed setting of aged mother trees in orchard of P. sylvestris var. mongolica were studied, which provided basic information for high quality, high yield and scientific management of Mongolian pine seed orchard.
      Method18 clones of P. sylvestris var. mongolica 24-year-old mother trees in Yulin P. sylvestris var. mongolica seed orchard of Shaanxi Province, northwestern China were selected as the research object, and the differences of 8 indexes of cone yield, cone size, seed yield and quality were compared between top pruning and non-top pruning.
      ResultThe results showed that top pruning treatment had no significant effect on single cone mass and cone mass per tree, but the average gain value reached 24.84% and 23.82%, respectively. This suggested that top pruning treatment could improve the yield of the cones of Mongolian pine mother trees in a certain extent. Top pruning treatment had significant effect on seed mass per tree and seed-production ratio, and the average gain values of seed mass per tree and seed-production ratio were 81.38% and 55.94%, respectively. It indicated that top pruning treatment increased the seed yield of Mongolian pine mother trees. The average values of cone short diameter and cone short diameter of mother trees after top pruning were 7.43% and 24.96%, respectively, and top pruning treatment had little effect on cone size of Mongolian pine mother trees. The average values of thousand seed mass and seed goodness of mother trees after top pruning were 7.43% and 24.96%, respectively, and most clones had positive gain in thousand seed mass and all clones had positive gain in seed goodness. Top pruning had no significant effect on thousand seed mass but had significant effect on seed quality. It indicated that top pruning treatment could improve seed quality of Mongolian pine mother tree.
      ConclusionThis study improves that top pruning could increase the yield and improve quality of P. sylvestris var. mongolica aged mother trees in sandy area.

       

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