The carbon sequestration response of aboveground biomass and soils to nutrient enrichment in boreal forests depends on baseline site productivity

Blaško, Róbert; Forsmark, Benjamin; Gundale, Michael J.; Lim, Hyungwoo; Lundmark, Tomas; Nordin, Annika

doi:10.1016/j.scitotenv.2022.156327

Cited by 8 publications

(5 citation statements)

References 74 publications

(169 reference statements)

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“…The difference results because of only measured the above-ground biomass and not all vegetation but only above 20 cm. One of the logging techniques that Reduce Impact logging needs to be applied in order to reduce damage to the stands [34,35,36] and reduce the loss of biomass or carbon mass due to logging activities [37,38,39,40].…”

Section: Carbon Mass Changementioning

confidence: 99%

Change of carbon mass after timber harvesting in a natural forest, West Sumatra Indonesia

Matangaran,

Barokah,

Mujahid

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Forests have an important role in the carbon cycle and in the dynamics of storing and releasing carbon in growth, decay, and disturbance processes. Timber harvesting initially reduces the amount of carbon in the forest. This study aims to analyze the magnitude of changes in carbon mass due to timber harvesting. It was conducted in a forest concessionaire located at Siberut of West Sumatra on a natural forest covering about 48,000 hectares. Selective cutting was implemented for logging where the harvestable trees were over 50 cm in diameter. The amount of carbon mass was obtained based on laboratory tests on tree parts, including trunk, branches, twigs, and bark. The average carbon content in each part of the tree is different. The trunk contains 53.86% of carbon mass, the branches are 51.98%, the twigs are 31.58%, the leaves are 27.91%, and the bark is 32.01%. Timber harvesting was conducted at the forest compartment with an average forest stand density of 71.5 trees ha−1 and a felling intensity of 8.8 trees ha−1, causing damage to 16.17 trees ha−1 stands. Timber harvesting causes a decrease in carbon mass reserves of 43.26% from forest carbon mass of 141.89 tons C ha−1 before harvesting to 80.00 tons C ha−1 after harvesting.

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Section: Carbon Mass Changementioning

confidence: 99%

Change of carbon mass after timber harvesting in a natural forest, West Sumatra Indonesia

Matangaran,

Barokah,

Mujahid

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…Therefore, N fertilization can be used to increase forest C sequestration 7 , 8 . The ecosystem C response to N, however, depends strongly on N nutrition of trees in the forest; the greater the foliar N concentration of the trees, the smaller the increase in C sequestration following N fertilization 9 . Forests suitable for N fertilization can therefore be identified by measuring the foliar N concentration.…”

Section: Introductionmentioning

confidence: 99%

“…Despite a relatively good understanding of the factors controlling C–N responses, the coupled responses of soil N dynamics and ecosystem C sequestration are poorly understood. N fertilization increases plant-available N fluxes of ammonium and nitrate, but only a small fraction of the added N (approximately 10% in boreal forests and 16–32% in temperate forests) is taken up by trees; the majority is immediately immobilized and locked up in soils 8 , 9 . Also, under conditions that favor nitrification, some of the added N is nitrified and quickly leaches out from the soil systems.…”

Section: Introductionmentioning

confidence: 99%

No impact of nitrogen fertilization on carbon sequestration in a temperate Pinus densiflora forest

Baek

Lim

Noh

et al. 2023

Sci Rep

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Carbon (C) sequestration capacity in forest ecosystems is generally constrained by soil nitrogen (N) availability. Consequently, N fertilization is seen as a promising tool for enhancing ecosystem-level C sequestration in N-limited forests. We examined the responses of ecosystem C (vegetation and soil) and soil N dynamics to 3 years of annual nitrogen-phosphorus-potassium (N3P4K1 = 11.3 g N, 15.0 g P, 3.7 g K m−2 year−1) or PK fertilization (P4K1), observed over 4 years in a 40-year-old Pinus densiflora forest with poor N nutrition in South Korea. PK fertilization without N was performed to test for PK limitation other than N. Neither tree growth nor soil C fluxes responded to annual NPK or PK fertilization despite an increase in soil mineral N fluxes following NPK fertilization. NPK fertilization increased the rate of N immobilization and 80% of the added N was recovered from mineral soil in the 0–5 cm layer, suggesting that relatively little of the added N was available to trees. These results indicate that N fertilization does not always enhance C sequestration even in forests with poor N nutrition and should therefore be applied with caution.

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“…Increased foliage mass and photosynthesis are closely related to the rapid development in basal area in young stands (Bergh et al, 1999;. Fertilization promotes the production of foliage, and differences are usually found between fertilized and control stands for a few years after the first application (Bennett et al, 2011;Blaško et al, 2022). In this study, this was significant in 2018, 2019 and 2021 for spruce (Figure 20b) and for the total basal area (Figure 20c).…”

Section: Biomass and Growthmentioning

confidence: 51%

“…Fertilizing forestland with N increases not only tree growth but also the soil C stock (Johnson, 1992;Johnson & Curtis, 2001;Hyvönen et al, 2007;Blaško et al, 2015;Mäkipää et al, 2023), and it affects the forest soil N cycle, which in turn affects CO2 fluxes (Blaško et al, 2022). Soil CO2 emissions have been shown to decrease after fertilization (Olsson et al, 2005;Ågren & Andersson, 2012;Yan et al, 2018;Jörgensen et al, 2021;Marshall et al, 2021;Blaško et al, 2022).…”

Section: Fertilizationmentioning

confidence: 99%

Greenhouse Gas Fluxes and CarbonSequestration in Young Norway Spruce Stands: The Effects of Fertilization

Håkansson

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The enormous challenge of climate change is discussed and debated today because of its major impact on life on Earth. The forests have an important role to play as the plants absorb carbon dioxide (CO2) from the atmosphere through their photosynthesis and the growing tree retain carbon (C). Hence, the larger the growth the greater the carbon storage and climate benefit. The demand for wood and wood products is increasing as well as the ongoing debate about forest management. Therefore, alternative management methods to increase wood production is of interest and the effects these methods could have on climate change mitigation. In this context this Thesis deals with the effect of fertilization on carbon balance and growth in young forest as well as flows of the greenhouse gases, CO2, methane (CH4), and nitrous oxide (N2O) from forest land. In addition, it deals also with the reliability and comparability of different measurement methods which are compared with respect to the carbon balance. The studies have been carried out in a young mixed stand of Norway spruce (Picea abies (L.) Karst) and birch (Betula pendula and B.pubescens) on a storm-felled (Gudrun 2005) area in southern Sweden, Kronoberg county. Part of the area was fertilized with 150 kg N ha-1 everysecond year from 2014 and forward, while the other part was kept unfertilized. In the unfertilized part a dose experiment was set up where 0,150, 300, and 450 kg N ha-1 were added to investigate the impact of the different fertilizer levels on forest floor greenhouse gas fluxes. Chamber measurements of forest floor fluxes, eddy-flux measurements of stand net-fluxes and tree measurements of height, diameter and birch leaf biomass were conducted in different, occasionally overlapping, periods in the years 2013-2021. The results show that even if the flows of CO2 from the forest floor increase initially after a first standard fertilization, the effect decreases quickly. The net fluxes show that the stands become carbon sinks already eight years after the storm with a net uptake of about 18 ton CO2 ha-1 yr-1 of. The forest floor fluxes of CH4 and N2O also show a short-term effect of fertilization, however the levels are very low compared to CO2. The fertilization induced increase of total tree biomass growth increased with time. The results show that 12 and 15 years after regeneration, the fertilization compared to the control has increased the tree growth by 3.4 and 6.3 m3 ha-1 yr-1 and carbon storage by 4.7 and 8.7 ton C ha-1 yr-1 respectively. Comparison of measurement results of the Eddy-flux technique's netflows and chamber measurements of soil respiration together with tree growth shows the importance of calibrating the measurement methods when the results are later to be used in modeling future climate scenarios.

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The carbon sequestration response of aboveground biomass and soils to nutrient enrichment in boreal forests depends on baseline site productivity

Cited by 8 publications

References 74 publications

Change of carbon mass after timber harvesting in a natural forest, West Sumatra Indonesia

Change of carbon mass after timber harvesting in a natural forest, West Sumatra Indonesia

No impact of nitrogen fertilization on carbon sequestration in a temperate Pinus densiflora forest

Greenhouse Gas Fluxes and CarbonSequestration in Young Norway Spruce Stands: The Effects of Fertilization

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