Koivusekoituksella laatupuuta istutusmänniköihin?

Valkonen, Sauli; Ruuska, Juha

doi:10.14214/ma.5822

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Scots pine and silver birch grow commonly together in most of Eurasia (Hämet-Ahti et al 1992) and are widely cultivated species of great economic importance, especially in Scandinavia. They are pioneer trees that actively compete for light: at medium fertile sites they gain height approximately in-phase (Valkonen and Ruuska 2001). Our main focus was to examine the effect of speciesspecific branching architecture and leaf display of neighbouring trees on their light transmission.…”

Section: Virtual Study Plotsmentioning

confidence: 99%

Analysing species-specific light transmission and related crown characteristics ofPinus sylvestrisandBetula pendulausing a shoot-level 3D model

Lintunen¹,

Kaitaniemi

Perttunen³

et al. 2013

Can. J. For. Res.

View full text Add to dashboard Cite

This is a first attempt to analyse species-specific light attenuation in mixed boreal forests created by shoot-level 3D tree models. The models are configurations of real individual Scots pine (Pinus sylvestris L.) and silver birch (Betula pendula Roth.) trees grown in mixed-forest stands. We study species-specific differences in radiation transmission by using the ray-casting method. Light transmission was found to be higher in dense birch-dominated stands compared with dense pine-dominated stands because of the higher total foliage area and the higher location of foliage in the pine canopy. Transmission of light per leaf area index (LAI) was nevertheless higher in the pine canopy compared with the birch canopy because of foliage clumping. Especially in clumped canopy, species-specific shoot-level light simulations enable a more realistic estimation of light transmission compared with simpler calculations based on LAI and Beer–Lambert’s law. The observed differences in light-transmission characteristics of the studied species may influence the development of target crowns in the neighbourhood. Light attenuation caused by the dense foliage zone in the upper pine canopy could be avoided in dense stands by mixing species with different vertical foliage distributions.

show abstract

Section: Virtual Study Plotsmentioning

confidence: 99%