Modified ingrowth core method plus infrared calibration models for estimating fine root production in peatlands

Laiho, Raija; Bhuiyan, Rabbil; Straková, Petra; Mäkiranta, Päivi; Badorek, Tiina; Penttilä, Timo

doi:10.1007/s11104-014-2225-3

Cited by 30 publications

(40 citation statements)

References 36 publications

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“…The bulk density of peat in both sites was checked and the filling was planned to mimic that in 10-cm sections. For the bog forest this was quite successful, while for the fen forest the bulk density was somewhat higher in the cores than in the site (Laiho et al 2014).…”

Section: Ingrowth Core Preparation and Installationmentioning

confidence: 96%

“…The stand basal area is the sum of the tree stem cross-sectional areas measured at 1.3 m, in m 2 ha −1 , separately for Scots pine, downy birch and Norway spruce. Other data as in Laiho et al (2014) Scots pine roots, primarily by their easily identified dichotomously branched mycorrhizae, and colour: Scots pine was lighter in colour than Norway spruce. Next, we separated the roots of Norway spruce and downy birch by comparing their root and tip morphology, as shown in Table 2.…”

Section: Identification Of Fine Rootsmentioning

confidence: 99%

“…The ingrowth cores were prepared and installed as described by Laiho et al (2014). The cores were made of polyester fabric with mesh size approximately 1-mm × 1-mm.…”

Section: Ingrowth Core Preparation and Installationmentioning

confidence: 99%

“…Yet, in the Boreal Zone, most results suggest higher FRB or FRP at poorer sites (Helmisaari et al 2007;Yuan and Chen 2010;Lehtonen et al 2016). For peatlands, the scarce observations so far available suggest a contrasting pattern Laine 1998, 2000;Laiho et al 2014). The nutrient regime of peat soils fundamentally differs from that of mineral soils: peat soils contain clearly more nitrogen (N) but fewer mineral nutrients (e.g, Table 6 in Westman and Laiho 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Vogt and Persson 1991;Makkonen and Helmisaari 1999;Ostonen et al 2005;Brunner et al 2013). Recently, we designed a modified ingrowth core method for estimating the FRP in peat soils and presented the first-year results for different sites (Laiho et al 2014). However, first-year ingrowth data mainly capture the production of new roots for colonizing the cores and thus reflect the regenerative potential of the root system rather than the actual annual root production, especially in cold climates with prominent annual growth cycles (Cudlín and Chmelíková 1999;Finér and Laine 2000).…”

Section: Introductionmentioning

confidence: 99%

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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: Ingrowth Core Preparation and Installationmentioning

confidence: 96%

Section: Identification Of Fine Rootsmentioning

confidence: 99%

“…The ingrowth cores were prepared and installed as described by Laiho et al (2014). The cores were made of polyester fabric with mesh size approximately 1-mm × 1-mm.…”

Section: Ingrowth Core Preparation and Installationmentioning

confidence: 99%