文献类型：期刊文献

英文题名：Effects of species mixing on maximum size-density relationships in Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.)-dominated mixed forests converted from even-aged pure stands

作者：Han, Yuanyuan[1,2] Wang, Baichang[3] Sun, Honggang[1,4]

第一作者：Han, Yuanyuan

通信作者：Sun, HG[1];Sun, HG[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou, Zhejiang, Peoples R China;[2]Nanjing Forestry Univ, Nanjing, Peoples R China;[3]Natl Forestry & Grassland Adm, East China Inventory & Planning Inst, Hangzhou, Peoples R China;[4]Res Inst Fast growing Trees, Res Inst Fast Growing Trees, State Key Lab Efficient Prod Forest Resources, Hangzhou, Peoples R China

年份：2024

卷号：15

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001204726500001)】；

基金：We thank the East China Inventory and Planning Institute of the National Forestry and Grassland Administration for contributing the long-term observations from the National Forest Inventory data. We thank the two reviewers for their valuable comments. We thank Chris Akcali, PhD, Liwen Bianji (Edanz) (www.liwenbianji.cn), for editing the language of a draft of this manuscript.r The author(s) declare that financial support was received for theresearch, authorship, and/or publication of this article. This work was funded by the Province-Academy Cooperative Forestry Science and Technology Project of Zhejiang Province and Chinese Academy of Forestry (No. 2021SY05) and National Key Research and Development Program of China (No. 2021YFD2201303-03).

语种：英文

外文关键词：Chinese fir-dominated mixed forests; maximum size-density relationships; mixing proportion; latitude; site conditions

摘要：Introduction: Density management is a key silvicultural tool in management programs that enhances compositional and structural diversity and hence forest growth during the conversion of even-aged pure stands into mixed forests. Methods: To determine the optimum stand density, a model of maximum size-density relationships was employed to explore the relationship of the self-thinning trajectory with growth, species mixing, latitude, and site conditions during the transition of even-aged pure Chinese fir stands to Chinese fir-dominated mixed forests using stochastic frontier analysis. Data were obtained from a total of 591 permanent plots located in Fujian, Jiangxi, Zhejiang, and Anhui provinces in southern China. Results: The results showed that (1) the slope of the maximum size-density relationship of Chinese fir-dominated mixed forests increased and plateaued over time; (2) the slope of the maximum size-density relationship of Chinese fir-dominated mixed forests did not deviate from Reineke's assumed universal slope of -1.605; and (3) mixing proportion had a positive effect on maximum size-density relationships, and latitude and site conditions had the opposite effect on maximum size-density relationships. Conclusions: Our findings will provide valuable guidance for the forest management of areas in which even-aged pure stands are being converted to mixed forests (i.e., when broadleaved tree species are planted after thinning to improve overall stand density and promote stand growth).