Fine root turnover and litter production of Norway spruce in a long-term temperature and nutrient manipulation experiment

Leppälammi‐Kujansuu, Jaana; Salemaa, Maija; Kleja, Dan Berggren; Linder, Sune; Helmisaari, Heljä‐Sisko

doi:10.1007/s11104-013-1853-3

Cited by 98 publications

(68 citation statements)

References 72 publications

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“…This is because the independent FRB was clearly smaller than the FRB based on our ingrowth cores. However, the FRT using both the maximum and mean biomass values somehow agreed with studies of mineral soils by Hansson et al (2013) in a mixed conifer stand and Leppälammi-Kujansuu et al (2014) in a sprucedominated stand. The FRT estimated, using the biomass found in the ingrowth cores, rather than using the independent FRB, may in fact be more realistic, since both the FRP and FRB in the cores represent the same fineroot system.…”

Section: Betula Pubescenssupporting

confidence: 76%

Estimating fine-root production by tree species and understorey functional groups in two contrasting peatland forests

et al. 2016

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Background and aims Estimation of root-mediated carbon fluxes in forested peatlands is needed for understanding ecosystem functioning and supporting greenhouse gas inventories. Here, we aim to determine the optimal methodology for utilizing ingrowth cores in estimating annual fine-root production (FRP) and its vertical distribution in trees, shrubs and herbs. Methods We used 3-year data obtained with modified ingrowth core method and tested two calculation methods: 'ingrowth-dividing' and 'ingrowthsubtracting'. Results The ingrowth-dividing method combined with a 2-year incubation of ingrowth cores can be used for the 'best estimate' of FRP. The FRP in the nutrient-rich fen forest (561 g m −2 ) was more than twice that in the nutrient-poor bog forest (244 g m −2 ). Most FRP occurred in the top 20-cm layer (76-82 %). Tree FRP accounted for 71 % of total FRP in the bog and 94 % in the fen forests, respectively, following the aboveground vegetation patterns; however, in fen forest the proportions of spruce and birch in FRP were higher than their proportions in stand basal area. Conclusions Our methodology may be used to study peatland FRP patterns more widely and will reduce the volume of labour-intensive work, but will benefit from verification with other methods, as is the case in all in situ FRP studies.

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Section: Betula Pubescenssupporting

confidence: 76%

Estimating fine-root production by tree species and understorey functional groups in two contrasting peatland forests

et al. 2016

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“…This assumption is supported also by literature (e.g. Leppälammi-Kujansuu et al 2013) and suggested by the gently higher thickness of surface humus layer in the soil cores (Table 3). However, since neither the differences in C tot , N tot and S tot concentrations nor the differences in the compressed humus layer were significant, no final conclusions can be drawn at this moment.…”

Section: Discussionsupporting

confidence: 88%

Long-term influence of applied amphibolite powder on the chemistry of soil supporting Norway spruce plantation

2014

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ABSTRACT:The article assesses the effects of amphibolite applied to the planting holes of spruces on the soil chemistry. The sampling was conducted fourteen growth seasons after the establishment of the experimental spruce plantation. In both treatments (control and amphibolite) the soil samples were taken from the interior of the planting holes as well as from the intact area around the planting holes. Fourteen growth seasons after application the effects of the pulverised amphibolite were not marked despite being detectable. In comparison with the control the soil in the planting holes of the amphibolite treatment showed significantly higher soil reaction, concentration of available phosphorus and partially also concentration of exchangeable Ca. All the significant effects of amphibolite were confined to the soil inside the planting holes. As for the evaluated chemical properties no significant undesirable effects of the amphibolite on soil chemistry were recorded.

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“…However, the variation in the total production and turnover rates from year to year has generally been recorded within a single tree species and/or stand (Burke and Raynal 1994;Rytter 2013;Leppälammi-Kujansuu et al 2014), and the interannual variability in the fine root turnover rate was equal to or greater than the difference among species obtained for some temperate tree species (McCormack et al 2014). In addition, soil depth could also have a major influence on the fine root dynamics of shrubs (Aerts et al 1989;Baddeley and Watson 2005).…”

Section: Discussionmentioning

confidence: 99%

“…in unit of root length m -2 ). The previous studies showed that there was a strong positive correlation between the number and the length of fine roots (Leppälammi-Kujansuu et al 2014) and the fine root production and turnover rates calculated using the root length were similar to those calculated using the root number (McCormack et al 2014). Therefore, the fine root production and turnover rate were calculated using the numbers of roots produced instead of the root length (West et al 2004;McCormack et al 2014).…”

Section: Fine Root Dynamicsmentioning

confidence: 93%

Response of the fine root production, phenology, and turnover rate of six shrub species from a subtropical forest to a soil moisture gradient and shading

Wang

et al. 2015

Plant Soil

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Background and aims Knowledge of the fine root dynamics of different life forms in forest ecosystems is critical to understanding how the overall belowground carbon cycling is affected by climate change. However, our current knowledge regarding how endogenous or exogenous factors regulate the root dynamics of understory vegetation is limited. The aims of this study were to test the effects of soil moisture gradient and shading on the fine root production, phenology, and turnover rate of six shrub species from a subtropical forest. Methods We selected a suite of study sites representing different habitats with gradients of soil moisture and solar radiation (shading or no shading). We assessed the fine root production phenology, the total fine root production, and the turnover among six understory shrub species in a subtropical climate, and examined the responses of the fine root dynamics to gradients in the soil moisture and solar radiation. The shrubs included three evergreen species, Loropetalum chinense, Vaccinium bracteatum, and Adinandra millettii, and three deciduous species, Serissa serissoides, Rubus corchorifolius, and Lespedeza davidii. Results We observed that variations in the annual fine root production and turnover among species were significant in the deciduous group but not in the evergreen group. Notably, V. bracteatum and S. serissoides presented the greatest responses in terms of root phenology to gradients in the soil moisture and shading: high-moisture habitat led to a decrease and shade led to an increase in fine root production during spring. Species with smaller fine roots of the 1 st +2 nd -order diameter presented more sensitive responses in terms of fine root phenology to a soil moisture gradient. Species with a lower fine root carbon-to nitrogen ratio exhibited more sensitive responses in terms of fine root annual production to shading. Soil moisture and shading did not change the annual fine root production as much as the turnover rate. Conclusions The fine root dynamics of some understory shrubs varied significantly with soil moisture and solar radiation status and may be different from tree species. Our results emphasize the need to study the understory fine root dynamics in the achievement of a complete understanding of the overall belowground carbon cycling in a forest ecosystem, particularly ecosystems in which the understory fine root highly contributes to the belowground biomass.

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Fine root turnover and litter production of Norway spruce in a long-term temperature and nutrient manipulation experiment

Cited by 98 publications

References 72 publications

Estimating fine-root production by tree species and understorey functional groups in two contrasting peatland forests

Estimating fine-root production by tree species and understorey functional groups in two contrasting peatland forests

Long-term influence of applied amphibolite powder on the chemistry of soil supporting Norway spruce plantation

Response of the fine root production, phenology, and turnover rate of six shrub species from a subtropical forest to a soil moisture gradient and shading

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