Journal of Northwest Forestry University, Volume. 40, Issue 4, 9(2025)
Study on the Growth Process of Eight Oak Species across Different Distribution Areas
The oak tree species group holds the top position in both distribution area and standing volume in China Studying its growth process provides a basis for the utilization and management of oak forests In the present study we focused on eight common oak species Q aliena Q aliena var acutiserrata Q variabilis Q acutissima Q wutaishanica Q mongolica Q myrsinifolia and C fargesii We combined the analytic timber data from eight main distribution provinces and analyzed the average growth and annual in crement of tree height DBH and volume for each species We also conducted model fitting and accuracy assessment on the overall growth of these three indicators The growth status and fitting results varied among oak species across different distribution areas The annual increment of tree height and DBH showed a downward trend after twenty years for deciduous oak species while that of evergreen oak species began to decline after ten years Significant differences were observed in the mean annual increment of Q aliena between different distribution areas P<0 05 while no significant differences were observed between different distribution areas for Q mongolica and Q variabilis P>0 05 The optimal model equation of each growth indicator were best described by quadratic curve models for deciduous oaks while it was predominantly Richard models for evergreen oaks In short there are differences in the growth of oak species in different distribution areas and the competition of evergreen oak stands will appear earlier than deciduous oak The findings from this study can provide a valuable scientific reference to estimation of carbon sink in oak forests
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NIE Wen, LIU Jianfeng, WANG Qi, HUANG Ruizhi, SUN Jingyi, ZHAO Yipei, YANG Shaowei, CHENG Xiangfen, XIAO Wenfa. Study on the Growth Process of Eight Oak Species across Different Distribution Areas[J]. Journal of Northwest Forestry University, 2025, 40(4): 9
Received: Jul. 1, 2024
Accepted: Sep. 12, 2025
Published Online: Sep. 12, 2025
The Author Email: LIU Jianfeng (liujf@caf.ac.cn)