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| 川西山地岷江冷杉风景林林分空间结构分析 | |
| 引用本文： | 王丽,蔡小虎,王宇,谢大军,李红霞,闵安民,何建社,杨昌旭.川西山地岷江冷杉风景林林分空间结构分析[J].林业科学研究,2013,26(5):622-627. |
| 作者姓名： | 王丽 蔡小虎 王宇 谢大军 李红霞 闵安民 何建社 杨昌旭 |
| 作者单位： | 1. 四川省林业科学研究院,四川成都,610066 2. 四川省阿坝藏族羌族自治州科学技术研究院,四川汶川,623000 3. 四川省理县林业局,四川理县,623100 |
| 基金项目： | 国家林业局公益专项:川西山地退化风景林生态恢复关键技术研究;四川林科院自列项目:四川省主要森林土壤类型肥力诊断及评价 |
| 摘 要： | 应用传统林分结构因子配合混交度、角尺度、大小比数和开敞度4个林分空间结构参数,分析了川西山地退化风景林的空间结构特征.结果表明:林分结构较为简单,林分乔木层由7个树种组成,树种密度分布差异较大,树种结构相对单一;林分垂直结构特征明显,可分为3个林层,呈现出典型的复层林结构特征;林分平均混交度为0.46,以中强度混交单元为主,所占比例达61％;平均角尺度为0.483,属于随机分布状态;林木的胸径大小比数为0.286,有接近30％的林木处于优势状态;林分平均敞开度为0.309,林木生长空间基本充足.岷江冷杉种群优势度明显,群落处于相对稳定状态,其他5个树种由于株数较少,且径级分布不连续,自然更新较困难,经过一定时间的演化,将死亡,因此必须切实采取保护措施,保证其顺利生长,以保持物种多样性和群落的稳定性. |
| 关 键 词： | 川西山地 风景林 空间结构 岷江冷杉 |
| 收稿时间： | 7/4/2012 12:00:00 AM |
Spatial Structure of Scenic Forest of Abies faxoniana in Western Sichuan |
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| WANG Li,CAI Xiao-hu,WANG Yu,XIE Da-jun,LI Hong-xi,MIN An-min,HE Jian-she and YANG Chang-xu.Spatial Structure of Scenic Forest of Abies faxoniana in Western Sichuan[J].Forest Research,2013,26(5):622-627. | |
| Authors: | WANG Li CAI Xiao-hu WANG Yu XIE Da-jun LI Hong-xi MIN An-min HE Jian-she and YANG Chang-xu |
| Institution: | Sichuan Academy of Forestry, Chengdu 610066, Sichuan, China;Sichuan Academy of Forestry, Chengdu 610066, Sichuan, China;Sichuan Academy of Forestry, Chengdu 610066, Sichuan, China;Sichuan Academy of Forestry, Chengdu 610066, Sichuan, China;Sichuan Academy of Forestry, Chengdu 610066, Sichuan, China;Sichuan Academy of Forestry, Chengdu 610066, Sichuan, China;Aba Academy of Science and Technology, Wenchuan 623000, Sichuan, China;Forestry Bureau of Lixian County, Lixian 623100, Sichuan, China |
| Abstract: | Combining traditional stand structure indexes with 4 spatial structure parameters (mingling, angle index, neighborhood comparison and opening degree), the spatial structure of Abies faxoniana scenic forest in western Sichuan was studied. The results indicated that the species diversity of A. faxoniana scenic forest was simple. There were 7 tree species in tree layers, and the vertical structure of stand could be divided into 3 layers. The average mingling of the stand was 0.46, showing that the mixed degree of the forest is in middle intensity, and the middle mixed degree was 61% of the stand. The angle index was 0.483, indicating that the tree position in this stand was randomly distributed. The neighborhood comparison was 0.286, and there were nearly 30% trees in the stand being dominant. The average opening degree was 0.309, displaying the growth space of most trees in the forest was sufficient. A. faxoniana population is dominant now, and the community is in a relatively stable state. But because of the number of other 5 tree species is few, and the DBH structure of community was not continuous, the natural regeneration is difficult, and after a certain time of evolution ,they may disappear. So it is urgent to take practical protection measures to ensure the tree's growth in order to maintain the species diversity and community stability. |
| Keywords: | western Sichuan scenic forest spatial structure Abies faxoniana |
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