全球智库信息集成服务系统(G2TT): Model-based investigation on the effects of spatial evenness, and size selection in thinning of Picea abies stands.

G2TT

来源类型	Article
规范类型	其他
DOI	10.1080/02827581.2019.1577914
	Model-based investigation on the effects of spatial evenness, and size selection in thinning of Picea abies stands.
	Fransson P; Nilsson U; Lindroos O; Brännström Å
发表日期	2019
出处	Scandinavian Journal of Forest Research 34 (3): 189-199
出版年	2019
语种	英语
摘要	Size and spatial distribution of trees are important for forest stand growth, but the extent to which it matters in thinning operations, in terms of wood production and stand economy, has rarely been documented. Here we investigate how the choice of spatial evenness and tree-size distribution of residual trees impacts wood production and stand economy. A spatially explicit individual-based growth model was used, in conjunction with empirical cost functions for harvesting and forwarding, to calculate net production and net present value for different thinning operations in Norway spruce stands in Northern Sweden. The in silico thinning operations were defined by three variables: (1) spatial evenness after thinning, (2) tree size preference for harvesting, and (3) basal area reduction. We found that thinning that increases spatial evenness increases net production and net present value by around 2.0%, compared to the worst case. When changing the spatial evenness in conjunction with size preference we could observe an improvement of the net production and net present value up to 8.0%. The magnitude of impact differed greatly between the stands (from 1.7% to 8.0%) and was highest in the stand with the lowest stem density.
主题	Evolution and Ecology (EEP) ; Ecosystems Services and Management (ESM)
关键词	Thinning, individual-based model, spatial distribution, forest management, simulation
URL	http://pure.iiasa.ac.at/id/eprint/15762/
来源智库	International Institute for Applied Systems Analysis (Austria)
引用统计
资源类型	智库出版物
条目标识符	http://119.78.100.153/handle/2XGU8XDN/131616
推荐引用方式 GB/T 7714	Fransson P,Nilsson U,Lindroos O,et al. Model-based investigation on the effects of spatial evenness, and size selection in thinning of Picea abies stands.. 2019.