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林业资源管理 ›› 2020, Vol. 0 ›› Issue (6): 123-127.doi: 10.13466/j.cnki.lyzygl.2020.06.020

• 科学研究 • 上一篇    下一篇

基于分层的19a生半天然杉阔混交林特征分析

李志明()   

  1. 福建省顺昌县林业局,福建 顺昌 353200
  • 收稿日期:2020-09-15 修回日期:2020-11-20 出版日期:2020-12-28 发布日期:2021-01-26
  • 作者简介:李志明(1973-),男,福建莆田人,工程师,主要从事森林资源管理和森林可持续经营方面的研究。Email: npsclzm@163.com
  • 基金资助:
    中国林科院基本科研业务费专项资助项目中亚热带人工林转天然阔叶林的关键技术研究(CAFYBB2017ZC002)

Analysis on Characteristics of 19 year-old Semi-Natural Forest of Cunninghamia lanceolata and Broad-Leaved Trees Based on Stratification

LI Zhiming()   

  1. Forestry Bureau of Shunchang County,Shunchang,Fujian 353200,China
  • Received:2020-09-15 Revised:2020-11-20 Online:2020-12-28 Published:2021-01-26

摘要:

19a生半天然杉阔混交林乔木层层次结构分化明显,应用最大受光面法可将乔木层明显划分为2个亚层,第Ⅰ亚层树高≥13.0 m。林分平均胸径13.7 cm,平均树高14.6 m,株数密度2 867株/hm2,单位面积蓄积量309.7 m3/hm2。第Ⅰ亚层和第Ⅱ亚层的平均胸径分别为17.1 cm和10.3 cm,平均树高分别为16.4 m和10.6 m;第Ⅰ亚层和第Ⅱ亚层的株数分别占全林的43.60%和56.40%,单位面积蓄积量分别占全林的74.98%和25.02%。乔木层共有17种树种,杉木占绝对优势,重要值为61.88%;第Ⅰ亚层有8种树种,第Ⅱ亚层有17种树种,杉木在第Ⅰ亚层和第Ⅱ亚层均占绝对优势,重要值分别为76.20%和58.31%。乔木层物种丰富度S、多样性指数SW、均匀度E和生态优势度ED分别为17,1.46,0.36和0.62,其中第Ⅰ亚层分别为8,0.83,0.28和0.78;第Ⅱ亚层分别为17,1.80,0.44和0.51。

关键词: 半天然林, 杉木, 阔叶树, 天然更新, 树种组成, 多样性, 最大受光面法

Abstract:

The tree stratum of 19 year-old semi-natural forest of Cunninghamia lanceolata and broad-leaved trees was stratified obviously to 2 sub-strata (sub-stratum I and sub-stratum II) by MLRP (Maximum Light Receiving Plane) method.The tree height in sub-stratum I was higher than or equal to 13.0 m.Its average stand DBH,height,density and growing stock in tree stratum were 13.7 cm,14.6 m,2 867 N/hm2 and 309.7 m3/hm2 respectively.Its average stand DBH in sub-stratum I and sub-stratum II were 17.1cm and 10.3 cm respectively.Its average stand height in sub-stratum I and sub-stratum II were 16.4 m and 10.6 m respectively.Its percentage of stand density in sub-stratum I and sub-stratum II were 43.60% and 56.40% respectively.Its percentage of growing stock in sub-stratum I and sub-stratum II were 74.98% and 25.02% respectively.There were 17 tree species in tree stratum and C.lanceolata was the absolutely dominant tree species,with the important value of 61.88%.There were 8 and 17 tree species in sub-stratum I and sub-stratum II respectively.The important value of C.lanceolata (the absolutely dominant tree species) in sub-stratum I and sub-stratum II was 76.20% and 58.31% respectively.Its species richness (R),Shannon-Wiener index (SW),evenness (E) and ecological dominance (ED) in tree stratum were 17,1.46,0.36 and 0.62 respectively,which in sub-stratum I was 8,0.83,0.28 and 0.78 respectively.And the value in sub-stratum II were 17,1.80,0.44 and 0.51 respectively.

Key words: semi-natural forest, Cunninghamia lanceolata, broad-leaved trees, natural regeneration, tree species composition, diversity, maximum light receiving plane method

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