• 目录 •

### 坝下地区防护林不同树种生长特征

1. 北京林业大学水土保持学院/教育部水土保持与荒漠化防治重点实验室, 北京 100083
• 收稿日期:2017-03-07 修回日期:2017-07-21 出版日期:2017-10-18 发布日期:2017-10-18
• 作者简介:张杰铭,男,1993年生,硕士研究生.主要从事水土保持研究.E-mail:bfu_jiemzhang@163.com
• 基金资助:

本文由坝上高原及华北北部山地沙化土地治理与沙产业技术研发及示范项目(2016YFC0500802)和科技创新服务能力建设-协同创新中心-林果业生态环境功能提升协同创新中心(PXM2017_014207_000043)资助

### Growth characteristics of different tree species in shelterbelts in the depression area of Hebei Province, China.

ZHANG Jie-ming, YU Xin-xiao*, JIA Guo-dong, LIU Zi-qiang, LU Wei-wei

1. College of Soil and Water Conservation, Beijing Forestry University/Ministry of Education Key Laboratory of Soil and Water Conservation and Desertification Combating, Beijing 100083, China
• Received:2017-03-07 Revised:2017-07-21 Online:2017-10-18 Published:2017-10-18
• Supported by:

This work was supported by the Development and Demonstration of Desertification and Sand Industry in the Dam Plateau and North China (2016YFC0500802), and the Collaborative Innovation Center of Technological Innovation Systems and Service Capacity Building-Collaborative Innovation Center-Fruit Industry Ecological Environment Function Enhancement (PXM2017_014207_000043).

Abstract: This research investigated shelterbelt structure indices using the standard sampling met-hod, to study the dynamic changes of different tree species including Ulmus pumila, Populus simonii and Pinus tabuliformis in the depression area in Xiaobazi Township of Fengning County, Hebei Province, China. The results showed that the average age of U. pumila, P. simonii and P. tabuliformis pure forests was 10 years in this area. The average DBH and tree height of P. simonii pure forest were 2.3 times and 3.8 times as those of U. pumila pure forest, as well as, 2.3 times and 3.0 times as those of P. tabuliformis pure forest, respectively. The average DBH, tree height, LAI and height of first live branch of P. simonii pure forest were significantly larger than those of U. pumila pure forest and P. tabuliformis pure forest. Compared with P. simonii mixed forest, the stand density of P. simonii pure forest was 10.8% higher, average DBH of pure forest was 5.2% lower, and average tree height was 11.3% lower. Compared with U. pumila mixed forest, the stand density of U. pumila pure forest was 6.6% higher, average DBH and tree height of pure forest were 7.8% and 14.2% lower. Compared with P. tabuliformis mixed forest, the stand density of P. tabuliformis pure forest was 4.9% larger, but average DBH and tree height were 29.3% and 31.8% lower, respectively. The average DBH, tree height of different forest types showed significant negative correlation with the stand density. Average LAI showed significant positive correlation with density and height of first live branch, and significant negative correlation with the DBH, tree height. There was a significant positive relationship between the average height of first live branch and stand density. The increments of DBH and tree height of coniferous and broad-leaved mixed forest were significantly higher than those of coniferous pure forest. The comprehensive growth potential of the shelterbelts tended to increase, and the lateral growth potential on the whole exhibited a declining trend.