• 研究报告 •

### 帽儿山天然次生林内主要木本植物空间格局及更新特点

1. 东北林业大学林学院, 哈尔滨 150040
• 收稿日期:2018-07-22 出版日期:2019-06-15 发布日期:2019-06-15
• 通讯作者: * E-mail: lzg19700602@163.com
• 作者简介:舒兰,女,1993年生,硕士. 主要从事森林可持续经营研究. E-mail: 1439987589@qq.com
• 基金资助:
大兴安岭次生林抚育更新技术研究与示范项目(2017YFC0504103)、黑龙江省森林可持续经营试验示范区建设项目(201522-2)资助

### Spatial pattern and regeneration characteristics of main woody species in natural secondary forest in Maoershan, Northeast China.

SHU Lan, LIU Zhao-gang*, DONG Ling-bo

1. School of Forestry, Northeast Forestry University, Harbin 150040, China
• Received:2018-07-22 Online:2019-06-15 Published:2019-06-15
• Supported by:
This work was supported by the Research and Demonstration of Natural Secondary Forest Tending and Regeneration Technology in Great Xing’an Mountains (2017YFC0504103), and the Sustainable Forest Management Demonstration of Heilongjiang Province (201522-2)

Abstract: Based on the survey data from a 1 hm2 plot of the second forest in Maoershan, we divided the stand into four size degrees, including seedlings (tree height H<30 cm), saplings (H 30-130 cm or H>130 cm meanwhile DBH< 5 cm), medium trees (DBH 5-10 cm) and big trees (DBH≥10 cm). The spatial pattern and spatial association of all woody plants and three dominant tree species in four size degrees, as well as the basic forest regeneration, were chosen as study objects, to explore the renewal trend and provide theoretical basis for the sustainable forest management. The O-ring point pattern analysis method was used to analyze the spatial distribution and spatial association. The dominant trees were planted Pinus koraiensis and three common broadleaved tree species (Fraxinus mandshurica, Juglans mandshurica, Phellodendron amurense), and Ulmus pumila. The results showed that the regeneration of the stand was quite common, with 2894 seedlings·hm-2 and 3337 saplings·hm-2 . For the whole forest, the seedlings in the stand were positively associated with large trees and medium trees and saplings respectively at the scales of 0-25 m, 0-15 m and 0-40 m, and negatively associated at the subsequent scales. The saplings were positively associated with large trees and medium trees at 0-15 m, 0-25 m respectively, and had no significant association at the subsequent scales. Medium trees showed no significant association with big trees at all the scales. For the dominant trees, the saplings and seedlings of Pinus koraiensis showed negative association at the scale of 0-40 m, while the saplings and seedlings of the three common broadleaved tree species or Ulmus pumila were mainly non-associated. There was a negative association between the saplings of Pinus koraiensis and each size degree of the three common broadleaved tree species or Ulmus pumila at most scale, whereas saplings of the three common broadleaved tree species and Ulmus pumila showed a negative association with non-conspecies only at 0-20 m scale. In the medium and large size degrees, there was no significant association between each two of the three dominant tree species at the scale above 20 m. The secondary forest in Maoershan is still under the process of succession. During the process of forest resource management, measures should be taken to promote the renewal, and the unreasonable spatial pattern should be adjusted in time.