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农学学报 ›› 2019, Vol. 9 ›› Issue (10): 42-47.doi: 10.11923/j.issn.2095-4050.cjas19040017

所属专题: 园艺

• 林学 园艺 园林 食用菌 • 上一篇    下一篇

两种截冠处理对种子园樟子松幼龄母树生长的影响

阎雄飞, 刘永华   

  1. 榆林学院生命科学学院
  • 收稿日期:2019-04-12 修回日期:2019-05-05 接受日期:2019-05-20 出版日期:2019-10-22 发布日期:2019-10-22
  • 通讯作者: 阎雄飞 E-mail:yxfei1220
  • 基金资助:
    榆林市林业局科研专项“截冠处理对樟子松的高产技术研究”(2018001);中央财政林业科技推广示范项目“拉萨北山抗旱节水造林技术推 广”([2018]01)。

Eeffects of Two Top Pruning on Growth of Young Mother Trees in Orchard of Pinus sylvestris var. mongolica

  • Received:2019-04-12 Revised:2019-05-05 Accepted:2019-05-20 Online:2019-10-22 Published:2019-10-22

摘要: 【目的】樟子松是我国北方干旱和半干旱沙区防风固沙和水土保持的重要树种。研究两种截冠处理对种子园幼龄樟子松母树生长的影响,以期为樟子松种子园母树科学管理提供理论基础。【方法】本研究樟子松幼龄母树为研究对象,研究截冠矮化处理L2和L3对樟子松幼龄母树树高、地径、冠幅、枝下高、一年生小枝、二年生小枝、萌芽数量7个生长指标的影响。【结果】结果表明,截冠处理L2和L3均抑制了樟子松幼龄母树树高的生长,对母树的地径和冠幅的生长有明显的促进作用;截冠处理L2和L3和对照组一年生小枝和二年生小枝的平均长度的大小顺序均为L3 >L2 > 对照,说明截冠处理对小枝的长度有一定影响,截冠处理L2对樟子松幼龄母树一年生小枝与二年生小枝的长度无显著影响,截冠处理L3对樟子松幼龄母树一年生小枝长度无显著影响,但对二年生小枝长度有显著影响。两种截冠处理对樟子松幼龄母树的枝下高和萌芽数量无明显影响。【结论】两种截冠处理对幼龄母树生长均有不同程度的影响,L3更适合樟子松幼龄母树管理。本研究为樟子松种子园幼龄母树的科学管理提供了基础数据和理论依据。

关键词: 雨燕科, 雨燕科, 扫描电镜, 保护, 分类, 微观结构, 羽毛

Abstract: Effects of two kinds of top pruning on the growth of young mother trees in orchard of Pinus sylvestris var. mongolica were studied to provide a theoretical management basis. The young mother trees of P. sylvestris var. mongolica in Yulin, Shaanxi Province were selected as the research object, and they were pruned by top 2- wheeled branches (L2) and top 3-wheeled branches (L3). The effects of the two top pruning methods L2 and L3 on 7 growth indices of tree height, ground diameter, crown width, under crown height, clear bole height, annual branch length, biennial branch length, sprout number of young of P. sylvestris var. mongolica were studied. The results showed that both L2 and L3 inhibited the growth of tree height of young trees of P. sylvestris var. mongolica. They obviously promoted the growth of ground diameter and crown width of the young trees of P. sylvestris var. mongolica. The order of annual branch length and biennial branch length of L2, L3 and control group was L3> L2> control group. Top pruning methods L2 had no significant effect on annual branch length and biennial branch length. Top pruning methods L3 had no significant effect on annual branch length but had significant effect on biennial branch length, and could obviously promote the growth of branch length. Both L2 and L3 had no significant effect on biennial branch length and sprout number of young P. sylvestris var. mongolica. In conclusion, the two top pruning methods have different effects on the growth of young mother trees, and L3 is more suitable for the management of young mother trees of P. sylvestris var. mongolica.

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