Post-harvest soil nitrate dynamics in aspen- and spruce-dominated boreal forests

Jeřábková, Lucie; Prescott, Cindy E.

doi:10.1016/j.foreco.2007.01.003

Cited by 17 publications

(4 citation statements)

References 57 publications

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“…These authors reported strongly increased gross nitrification only during the first 2 years after forest thinning, whereas 4–6 years following thinning no significant effect was detectable. Also Carmosini et al (2002) found a stimulation of gross ammonification (organic layer and mineral soil) and gross nitrification (only the organic layer) in the first year after harvesting in boreal mixed aspen–conifer forests in western Canada, but Jerabkova & Prescott (2007) investigating boreal mixed‐wood forests in northern Alberta, Canada, did not find a significant post‐harvest increase of microbial activity 4 years after a clear‐cut.…”

Section: Discussionmentioning

confidence: 99%

Gross rates of ammonification and nitrification at a nitrogen‐saturated spruce (Picea abies (L.)Karst.) stand in southern Germany

Rosenkranz

Dannenmann

Brüggemann

et al. 2010

European J Soil Science

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We investigated the magnitudes of temporal and spatial variabilities of gross ammonification and nitrification, in an N‐saturated temperate forest ecosystem. Forest soil gross ammonification, gross nitrification and heterotrophic soil respiration were measured in the forest floor and uppermost mineral layer over a period of 3 years. Total annual gross fluxes for the organic layer and uppermost mineral horizon (0–4 cm) were in the range of 800–980 kg N ha−1 year−1 for gross ammonification and 480–590 kg N ha−1 year−1 for gross nitrification. Annual heterotrophic soil respiration was 8000–8900 kg C ha−1 year−1. Highest soil C and N turnover rates occurred in summer, and a consistent pattern was observed throughout the observation period, with highest values for plots located at a clear‐cut area and lowest values for plots located at an unmanaged, approximately 100‐year‐old, spruce control site. Soil moisture, soil temperature and substrate availability accounted for most of the observed variability of C and N turnover rates. Because gross rates of inorganic N production were more than an order of magnitude larger than ecosystem N losses along hydrological and gaseous pathways, our study underlines the importance of internal microbial N turnover processes for ecosystem N cycling and retention.

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Section: Discussionmentioning

confidence: 99%

Gross rates of ammonification and nitrification at a nitrogen‐saturated spruce (Picea abies (L.)Karst.) stand in southern Germany

Rosenkranz

Dannenmann

Brüggemann

et al. 2010

European J Soil Science

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“…The levels of available N at the site were compared with published data from boreal forest soils of Canada sampled with identical ionexchange membranes (PRS probes), including studies spanning over 1 to 11 growing seasons, monitoring unmanaged plots in a black spruce forest of Alberta (Jerabkova and Prescott, 2007), a wet spruce-fir forest of British Columbia (Hope, 2009), and another wet mixed-conifer forest in British Columbia (Bengtson et al, 2007). On a daily basis, the organic soil horizon sampled in the current study displayed 46 % less available NH 4 (range 15-67 %) and 62 % less NO 3 (range 30-77 %) than the other three sites.…”

Section: Treatment Effect On Soil and Foliar Nmentioning

confidence: 99%

Increased soil temperature and atmospheric N deposition have no effect on the N status and growth of a mature balsam fir forest

et al. 2013

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Nitrogen (N) is a major growth-limiting factor in boreal forest ecosystems. Increases of temperature and atmospheric N deposition are expected to affect forest growth directly and indirectly by increasing N availability due to higher rates of N mineralization. In order to understand the potential impacts of these changes, a mature balsam fir stand in Québec, Canada, was subjected during three consecutive growing seasons (2009–2011) to (i) experimentally increased soil temperature (4 °C) and earlier snowmelt (2–3 weeks) as well as (ii) increased inorganic N concentration in artificial precipitation (3 × current N concentrations using ¹⁵NH₄-¹⁵NO₃). Soil inorganic N was measured using buried ion-exchange membranes (PRS™ probes) and standard soil extractions. Dendrometers were used to monitor the variations in diameter growth and needles were analyzed annually for N to assess the nutritional response of trees. Results from the second (2010) and third (2011) year of treatment are reported.

After three years of treatment, there was no significant increase in soil nitrate (NO₃) or ammonium (NH₄) availability either in the organic or in the mineral soil as measured with standard soil extractions. Similar results were obtained with ion-exchange membranes, except for NH₄ in the forest floor, which increased by an average of 54% over the two years. No effect of treatments were observed on needle N or diameter growth, but an 8-day earlier peak in diameter growth was measured in heated plots in 2010.

We attributed the limited effects of our treatments to the acute soil competition for available N at the site. As a result, the projected modifications of the forest N cycle and concomitant increased forest growth due to an earlier snowmelt, increased soil temperature and N deposition should be considered with caution in similar cold N-poor ecosystems

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“…The limited effect of the soil heating on inorganic N availability could be due to the site condition. The levels of available N at the site were compared with published data from boreal forest soils of Canada sampled with identical ion-exchange membranes (PRS-probes) including studies spanning over one to 11 growing seasons, monitoring unmanaged plots in a black spruce forest of Alberta (Jerabkova and Prescott, 2007), a wet spruce-fir forest of British-Columbia (Hope, 2009), and another wet mixed-conifer forest in British-Columbia (Bengtson et al, 2007). On a daily basis, the organic soil horizon sampled in the current study displayed 46 % less available NH 4 (range 15-67 %) and 62 % less NO 3 (range 30-77 %) than the other three sites.…”

Section: Treatment Effect On Soil and Foliar Nmentioning

confidence: 99%

Three years of increased soil temperature and atmospheric N deposition have no effect on the N status and growth of a mature balsam fir forest

D’Orangeville¹,

Houle²,

Côté³

et al. 2013

Preprint

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Nitrogen (N) is a major growth-limiting factor in boreal forest ecosystems. Increases of temperature and atmospheric N deposition are expected to affect forest growth directly and indirectly, by increasing N availability due to higher rates of N mineralization. In order to understand the potential impacts of these changes, a mature balsam fir stand in Québec, Canada, was subjected to (i) experimentally increased soil temperature (4 °C) and earlier snowmelt (2–3 weeks) as well as (ii) increased inorganic N concentration in artificial precipitation (3 × current N concentrations using 15NH4–15NO3). Soil inorganic N was measured using buried ion exchange membranes (PRS™-probes) and standard soil extractions. Dendrometers were used to monitor the variations in diameter growth and needles were analyzed annually for N to assess the nutritional response of trees. After three years of treatment, there was no significant increase in soil nitrate (NO3) or ammonium (NH4) availability either in the organic or in the mineral soil as measured with standard soil extractions. Similar results were obtained with ion exchange membranes, except for an average 54% increase in the forest floor available NH4. No effect of treatments were observed on needle N or diameter growth, but an eight-day earlier peak in diameter growth was measured in heated plots in 2010. We attributed the limited effects of our treatments to the acute soil competition for available N at the site. As a result, the projected modifications of the forest N cycle and concomitant increased forest growth due to an earlier snowmelt, increased soil temperature and N deposition should be considered with caution in similar cold N-poor ecosystems

show abstract

Post-harvest soil nitrate dynamics in aspen- and spruce-dominated boreal forests

Cited by 17 publications

References 57 publications

Gross rates of ammonification and nitrification at a nitrogen‐saturated spruce (Picea abies (L.)Karst.) stand in southern Germany

Gross rates of ammonification and nitrification at a nitrogen‐saturated spruce (Picea abies (L.)Karst.) stand in southern Germany

Increased soil temperature and atmospheric N deposition have no effect on the N status and growth of a mature balsam fir forest

Three years of increased soil temperature and atmospheric N deposition have no effect on the N status and growth of a mature balsam fir forest

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