Effect of strip clear-cutting on the natural regeneration of Pinus tabuliformis plantations in northeastern China

PeerJ

article

Yunxia Sun¹  Jian Feng³  Huilin Gao²  Wanjin Hu⁴  Yang Qu⁴  Hongtao Zou¹  You Yin²  Yuan Li⁵  Meiyan Xin⁶ 

[1] Center for Post-Doctoral Studies of Agricultural Resources and Environment, College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning Province;College of Forestry, Shenyang Agricultural University, Shenyang, Liaoning Province;Liaoning Academy of Forestry Sciences, Shenyang, Liaoning Province;Liaoning Ecological and Experimental Forest Farm, Chaoyang, Liaoning Province;Liaoning Forestry Survey and Design Institute, Shenyang, Liaoning Province;Baogang Greening CO., LTD

关键词: Strip clear-cutting;    Branch length increment;    Photosynthetic capacity;    Pinus tabuliformis plantation;    Liaoning Province;   

DOI  :  10.7717/peerj.13341

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

In this study, the effect of strip clear-cutting on the natural regeneration performance of mature Pinus tabuliformis plantations in the three locations in western part of the Liaoning Province was analyzed. Strip clear-cutting, with clear-cut and uncut strip widths of 15, 20, 25 m, and 10 and 18 m, respectively, was conducted in spring 2014, and control, in each study location. Field investigations were conducted in 2017. Fifteen sample plots with sizes of 4 m2 (2 m × 2 m) were established in each clear-cut strip, uncut strip, and control. One to four saplings were randomly selected to measure the current year increment, and the lengths and numbers for branch of the first whorl. Three saplings were randomly selected from the center of the strip to measure the photosynthetic rate. Three sample plots with sizes of 4 m2 (2 m × 2 m) and 1 m2 control. Strip clear-cutting was a statistically significant treatment for the current year increment and length and number of branches of the first whorl. The saplings from the clear-cut strip with a width of 25 m have the largest photosynthetic capacity compared with those from the other strips and control. The transpiration rates of the large, medium, and small saplings from clear-cut strips are the largest and those of saplings from the control are the smallest. The water content of the decomposition and semi-decomposition layer in the control is the highest, but no significant difference was confirmed between the strip clear-cutting approaches.

【 授权许可】

CC BY