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Do nitrogen additio...
Do nitrogen additions change the sensitivity of detached shoots from Sitka and Norway spruce to freezing temperatures? Evidence from three field manipulation studies
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Sheppard, L J (författare)
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- Rosengren, Ulrika (författare)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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Emmett, B A (författare)
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(creator_code:org_t)
- 2010-05-21
- 2003
- Engelska.
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Ingår i: Scandinavian Journal of Forest Research. - : Informa UK Limited. - 0282-7581 .- 1651-1891. ; 18:6, s. 487-498
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Controversy surrounds the impact of atmospheric nitrogen (N) deposition on frost hardiness. There are no specific field studies and the relevance of data from N fertilizer studies is questionable. Field N manipulation experiments with Norway spruce [Picea abies . (L) Karst.] at Skogaby, Sweden, and Sitka spruce [P. sitchensis . (Bong.) Carr.] at Aber in Wales and Deepsyke in Scotland were sampled in November/December to assess hardiness. The N was supplied with different accompanying ions, from 35 to 100 kg N ha(-1) yr(-1), as solid fertilizer, in irrigation water or to the canopy. Detached shoots were experimentally frozen and damage was assessed from electrolyte leakage. Frost hardiness was not significantly affected by the N treatments irrespective of site, dose, species or length of treatment. Shoots that had received N were generally the most hardy. The results are consistent with the nutritional status of the foliage at the time of sampling.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- field manipulation
- frost hardiness
- nitrogen
- Norway spruce
- Sitka
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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