Density–growth relationships in thinned and unthinned Norway spruce and Scots pine stands in Norway

Gizachew, Belachew; Brunner, Andreas

doi:10.1080/02827581.2011.611477

Cited by 21 publications

(21 citation statements)

References 31 publications

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“…Due to intensive thinning, the stand volume increment was smaller than in control stands [19,20,46], whereas due to low intensity management, the influence of thinning was weak or none [46,47]. Some studies show a complete lack of influence of thinning on either stand growth [21,48] or biomass production [49]. It was found that, immediately after thinning, there was a decrease in stand volume growth, typically lasting approximately 10 years, levelling off after this period [50].…”

Section: Discussionmentioning

confidence: 99%

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Aboveground Carbon Content and Storage in Mature Scots Pine Stands of Different Densities

Wegieł¹,

Polowy²

2020

Forests

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Background and Objectives: The continuous increase in the amount of atmospheric CO2 is a factor that significantly contributes to global warming. Forests can be used to mitigate climate change by absorbing carbon and storing it. Scots pine (Pinus sylvestris L.) is the most abundant tree species in Polish forests and can substantially aid carbon accumulation. The aim of the study was to determine the carbon content in the dry mass of various parts of Scots pine trees and to evaluate the relationship between the accumulation of carbon in aboveground tree biomass and some stand parameters. Materials and Methods: The research was carried out in 20 even-aged (81–90 years old) Scots pine stands in northwestern Poland (Drawno Forest District). The densities of these stands ranged from 476 to 836 trees per hectare. The aboveground biomass was calculated as the sum of the following tree compartments: stem (wood and bark), dead branches, thick branches, thin branches and needles. The carbon content and storage in these compartments was determined. Results: The mean carbon content was lowest in stem wood (47.0%) and highest in needles (50.3%). No correlation between the stand density and the level of carbon stored in the aboveground biomass of Scots pines was found.

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Section: Discussionmentioning

confidence: 99%

“…It was found that, immediately after thinning, there was a decrease in stand volume growth, typically lasting approximately 10 years, levelling off after this period [50]. In addition, the remaining trees had a greater volume increment if thinning was more intense [44,48,51].…”

Section: Discussionmentioning

confidence: 99%

Aboveground Carbon Content and Storage in Mature Scots Pine Stands of Different Densities

Wegieł¹,

Polowy²

2020

Forests

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“…Other studies found that, immediately after thinning, there was a decrease in stand volume growth, typically lasting approximately 10 years, levelling off after this period (Egnell and Ulvcrona 2015). In addition, greater tree volume growth occurred in the remaining trees if thinning were heavier (Gizachew and Brunner 2011;Kuliešis et al 2010;Moulinier et al 2015). Notably, however, the growth of those trees that remain after heavy thinning or those grown at an initial low density may have poorer wood quality than trees grown at higher densities.…”

Section: Introductionmentioning

confidence: 96%

Relationship between stand density and value of timber assortments: a case study for Scots pine stands in north-western Poland

Wegieł

Bembenek

Łącka

et al. 2018

N.Z. j. of For. Sci.

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Background: Stand density changes during forest growth. Various types and intensities of thinning operations can be applied in order to improve the volume of the remaining trees. It is not clear whether or not thinning results in better total volume increment although timber value is usually higher when thicker logs are obtained from trees. The objective of this study was to determine if Scots pine (Pinus sylvestris L.) stands of lower density would produce timber of a higher value than stands with a higher density and thinner trees. Methods: The research was carried out on 20 experimental plots in 81-90-year-old Scots pine stands, located in northwestern Poland. The data obtained were used to simulate the logging of the trees into either 2.5-m logs or tree tops, which were classified into five quality classes of timber. The volume of each assortment was calculated, based on its dimensions, and the value in EUR was calculated. Results: It was found that the correlation between stand density and the total value of the wood was very weak and not statistically significant. However, taking each assortment separately, the values of sawmill wood, pulpwood and energy wood were significantly correlated with stand density. Conclusions: It was concluded that lower densities were more profitable for sawmill wood production, while higher densities might be more beneficial in biomass production.

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“…These results suggest the fast recovery potential of M. glyptostroboides plantation after thinning. However, many short-term studies have suggested that thinning would reduce the tree density, leading to the decline of the stand productivity [31, 32]. Nevertheless, thinning would improve the light environment within the forest and facilitate the growth of understory vegetation, which would partially remedy the carbon storage removed by the cut trees after thinning [33].…”

Section: Discussionmentioning

confidence: 99%

Effect of Forest Structural Change on Carbon Storage in a Coastal Metasequoia glyptostroboides Stand

Cheng

2013

The Scientific World Journal

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Forest structural change affects the forest's growth and the carbon storage. Two treatments, thinning (30% thinning intensity) and underplanting plus thinning, are being implemented in a coastal Metasequoia glyptostroboides forest shelterbelt in Eastern China. The vegetation carbon storage significantly increased in the underplanted and thinned treatments compared with that in the unthinned treatment (P < 0.05). The soil and litterfall carbon storage in the underplanted treatment were significantly higher than those in the unthinned treatment (P < 0.05). The total forest ecosystem carbon storage in the underplanted and thinned treatments increased by 35.3% and 26.3%, respectively, compared with that in the unthinned treatment, an increase that mainly came from the growth of vegetation aboveground. Total ecosystem carbon storage showed no significant difference between the underplanted and thinned treatments (P > 0.05). The soil light fraction organic carbon (LFOC) was significantly higher at the 0–15 cm soil layer in the thinned and underplanted stands compared with that in the unthinned stand (P < 0.05). The soil respiration of the underplanted treatment was significantly higher than that of the unthinned treatment only in July (P < 0.05). This study concludes that 30% thinning and underplanting after thinning could be more favorable to carbon sequestration for M. glyptostroboides plantations in the coastal areas of Eastern China.

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Density–growth relationships in thinned and unthinned Norway spruce and Scots pine stands in Norway

Cited by 21 publications

References 31 publications

Aboveground Carbon Content and Storage in Mature Scots Pine Stands of Different Densities

Aboveground Carbon Content and Storage in Mature Scots Pine Stands of Different Densities

Relationship between stand density and value of timber assortments: a case study for Scots pine stands in north-western Poland

Effect of Forest Structural Change on Carbon Storage in a Coastal Metasequoia glyptostroboides Stand

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