中国农业科技导报 ›› 2023, Vol. 25 ›› Issue (9): 217-226.DOI: 10.13304/j.nykjdb.2022.0251

• 生物制造 资源生态 • 上一篇    下一篇

择伐对布尔津山地天然林结构的影响

王佳佳1(), 贺涛2, 许国民2, 徐海量3(), 李丙文3   

  1. 1.新疆农业大学林学与风景园林学院,乌鲁木齐 830052
    2.新疆阿尔泰山国有林管理局布尔津分局,新疆 布尔津 836600
    3.中国科学院新疆生态与地理研究所,乌鲁木齐 830011
  • 收稿日期:2022-03-31 接受日期:2022-05-14 出版日期:2023-09-15 发布日期:2023-09-28
  • 通讯作者: 徐海量
  • 作者简介:王佳佳 E-mail:2283932209@qq.com
  • 基金资助:
    2021年新疆维吾尔自治区天然林保护修复项目(E1400120)

Effects of Selective Cutting on the Structure of Natural Forest in Burqin Mountainous Land

Jiajia WANG1(), Tao HE2, Guomin XU2, Hailiang XU3(), Bingwen LI3   

  1. 1.College of Forestry and Landscape Architecture,Xinjiang Agricultural University,Urumqi 830052,China
    2.Burqin Branch of Altai Mountain State Owned Forest Administration,Xinjiang Burqin 836600,China
    3.Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China
  • Received:2022-03-31 Accepted:2022-05-14 Online:2023-09-15 Published:2023-09-28
  • Contact: Hailiang XU

摘要:

为了探究林地择伐后的结构变化,为西伯利亚落叶松等重要物种的恢复提供依据,以阿尔泰山布尔津地区2种不同类型的天然林群落为研究对象,采用重要值法、径阶分布法研究采伐西伯利亚落叶松以后乔木树种组成、径级结构以及更新幼苗种类、数量和高度特征。结果显示,择伐前西伯利亚落叶松为优势树种,择伐30年后群落Ⅰ中弱度采伐(light thinning,LT)西伯利亚云杉重要值为65.30,占优势地位,强度采伐(height thinning,HT)落叶松重要值为56.70,位列第一。群落Ⅱ中西伯利亚冷杉重要值最大(61.05)。随着择伐强度增大林木直径分布向大径阶方向偏移,弱度采伐小径阶林木占比77.80%,强度采伐大径阶林木最多,株数占比为64.80%。择伐以后不同群落类型林下更新幼苗组成不同,群落Ⅰ中2种采伐强度云杉更新幼苗分别占61.00%(LT)和77.00%(HT),随着采伐强度增大,落叶松幼苗数量增加,弱度采伐幼苗高度集中在<30 cm高度级,强度采伐幼苗高度主要集中在30~60 cm。群落Ⅱ冷杉更新幼苗占92.00%,云杉幼苗仅少量存在。综合来看,择伐以后西伯利亚云杉、西伯利亚冷杉更新能力强于西伯利亚落叶松,表现出逐渐取代落叶松成为优势树种的趋势;择伐强度越高,落叶松自然更新效果越好,提示其天然更新可能需要充足的光照条件,为该地天然林的科学抚育及可持续经营提供理论依据。

关键词: 择伐, 森林结构, 天然林, 布尔津

Abstract:

In order to explore the structural changes of forest land after selective cutting and provide a basis for the restoration of important species such as Larix sibirica, 2 different types of communities of natural forest in Berqin area in Altai mountain were took as materials. The important value method and diameter class distribution method were used to study the species composition, diameter class structure in the arbor layer, the composition, number and height characteristics of renewed seedlings after the Larix sibirica had been felled. The investigated of the plot showed that Larix sibirica was the dominant species in 2 communities before felling. The important value of Picea obovata in height thinning (ZT) was 65.30, which was absolutely dominant, and the imporatnt value of Larix sibirica in height thinning (HT) ranking first with 56.70 in community Ⅰ. Abies sibirica had the largest important value for 61.05 in community Ⅱ after 30 years selective felling. With the increased of cutting intensity, the diameter distribution of trees shifted to a larger diameter class, small-diameter grades accounted for 77.80% in LT and the number of large-diameter trees accounted for 64.80% in HT. The regeneration characteristics of different community types were different after selective felling. Picea obovata seedlings accounted for 61.00% of light thinning and 77.00% of height thinning for community Ⅰ, with the increased of cutting intensity, Larix sibirica seedlings significantly increased. The seedling height level of light thinning was concentrated in <30 cm, while it was mainly concentrated in 30~60 cm for height thinning. Abies sibirica seedlings accounted for the vast majority for 92.00% but Picea obovata seedlings accounted for merely in community Ⅱ. Generally speaking, after selective felling, the regeneration ability of Abies sibirica and Picea obovata were stronger than that of Larix sibirica, and gradually replaced Larix sibirica as the predominant species; the higher the intensity of selective cutting, the better effects of natural regeneration of Larix sibirica. It was suggested that sufficient light conditions might be needed for natural regeneration.

Key words: selective felling, forest structure, natural forest, Burqin

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