Fine Root Production and Turnover in a Norway Spruce Stand in Northern Sweden: Effects of Nitrogen and Water Manipulation

Majdi, Hooshang; Andersson, Pål

doi:10.1007/s10021-004-0246-0

Cited by 99 publications

(70 citation statements)

References 29 publications

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“…In our study, fine roots in deeper layers are expected to experience less fluctuations in soil moisture and soil temperature than those in shallow soil. Fine root longevity was also shown to be negatively correlated with N availability (Majdi and Kangas 1997;Majdi and Andersson 2005) and the number of neighbouring roots as possible competitors (Wells and Eissenstat 2001). In agreement, N availability and fine root density decreased with soil depth in the studied spruce stand.…”

Section: Dependence Of Root Longevity On Root Diameter and Soil Depthsupporting

confidence: 70%

Estimating fine root longevity in a temperate Norway spruce forest using three independent methods

Gaul

Hertel

Leuschner

2009

Functional Plant Biol.

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Abstract. The importance of root systems for C cycling depends crucially on fine root longevity. We investigated mean values for fine root longevity with root diameter, root C/N ratio and soil depth using radiocarbon ( 14 C) analyses in a temperate Norway spruce [Picea abies (L.) Karst.] forest. In addition, we applied sequential soil coring and minirhizotron observations to estimate fine root longevity in the organic layer of the same stand. The mean radiocarbon age of C in fine roots increased with depth from 5 years in the organic layer to 13 years in 40-60 cm mineral soil depth. Similarly, the C/N ratios of fine root samples were lowest in the organic layer with a mean value of 24 and increased with soil depth. Roots >0.5 mm in diameter tended to live longer than those being <0.5 mm in diameter. By far the strongest variability in fine root longevity estimates was due to the chosen method of investigation, with radiocarbon analyses yielding much higher estimates (5.4 years) than sequential soil coring (0.9 years) and minirhizotron observations (0.7 years). We conclude that sequential soil coring and minirhizotron observations are likely to underestimate mean fine root longevity, and radiocarbon analyses may lead to an overestimation of mean root longevity.

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Section: Dependence Of Root Longevity On Root Diameter and Soil Depthsupporting

confidence: 70%

Estimating fine root longevity in a temperate Norway spruce forest using three independent methods

Gaul

Hertel

Leuschner

2009

Functional Plant Biol.

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“…The temporal patterns of fine root growth differed considerably between the species whereas the respective patterns were very similar to those reported in earlier studies (Ladefoged 1939;Majdi 2001;Majdi and Andersson 2005;Stober et al 2000). The present study thus indicates species inherent patterns of fine root growth.…”

Section: Fine Root Growthsupporting

confidence: 73%

“…Comparative studies concluded root traits being involved in the high competitiveness of F. sylvatica and evidence was found that fine root biomass turnover differs between the two species (Schmid 2002;Stober et al 2000;Van Praag et al 1988). Also, the timing of fine root dynamics seem to differ distinctly (Ladefoged 1939;Mainiero and Kazda 2006;Majdi 2001;Majdi and Andersson 2005;Stober et al 2000). The present study compares fine root dynamics of mature F. sylvatica and P. abies in a Southern German stand.…”

Section: Introductionmentioning

confidence: 92%

Fine root dynamics in 60-year-old stands of Fagus sylvatica and Picea abies growing on haplic luvisol soil

Mainiero¹,

Kazda

Schmid

2010

Eur J Forest Res

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“…As explained in Chap. 16, minirhizotrons are transparent tubes which can be inserted in the soil either vertically, horizontally or at an angle -45 being the most commonly used inclination of minirhizotron tubes (Majdi and Andersson 2005). Due to the non-destructive nature of minirhizotron observations, the same root can be observed repeatedly in selected intervals, which can range from days to years.…”

Section: Minirhizotronsmentioning

confidence: 99%

Fine Root Turnover

Lukáč¹

2011

Measuring Roots

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Fine roots constitute an interface between plants and soils and thus play a crucial role in forest carbon, nutrient and water cycles. Their continuous growth and dieback, often termed turnover of fine roots, may constitute a major carbon input to soils and significantly contribute to belowground carbon cycle. For this reason, it is of importance to accurately estimate not only the standing biomass of fine roots, but also its rate of turnover. To date, no direct and reliable method of measuring fine root turnover exists. The main reason for this is that the two component processes of root turnover, namely growth and dieback of fine roots, nearly always happen in the same place and at the same time. Further, the estimation of fine root turnover is complicated by the inaccessibility of tree root systems, its labour intensiveness and is often compounded by artefacts created by soil disturbance. Despite the fact that the elucidation of the patterns and controls of forest fine root turnover is of utmost importance for the development of realistic carbon cycle models, our knowledge of the contribution of fine root turnover to carbon and nutrient cycles in forests remains uncertain. This chapter will detail all major methods currently used for estimating fine root turnover and highlight their advantages as well as drawbacks. Why Measure Root Turnover?Fine roots are responsible for the bulk of water and nutrient acquisition and form the most active and short-lived part of the root system. A lively debate is ongoing in the root research community as to what is a fine root. This is largely fuelled by the fact

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Fine Root Production and Turnover in a Norway Spruce Stand in Northern Sweden: Effects of Nitrogen and Water Manipulation

Cited by 99 publications

References 29 publications

Estimating fine root longevity in a temperate Norway spruce forest using three independent methods

Estimating fine root longevity in a temperate Norway spruce forest using three independent methods

Fine root dynamics in 60-year-old stands of Fagus sylvatica and Picea abies growing on haplic luvisol soil

Fine Root Turnover

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