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Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus

Björkman, Erik and Lundeberg, Göran (1971). Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus. Technical Report. Stockholm: Predecessors to SLU > Royal School of Forestry, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 94
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Abstract

The phenomenon known as root competition in lichen pine forests has been studied by means of applying ammoniurn sulphate and potassium phosphate labelled with N15 and P32 respectively to a plot with a seed tree (Pinus sylvestris) in the centre. Under the tree there was a typical competition zone. Both Calluna vulgaris and Vaccinium vitis idaea proved to be at least as efficient absorbers of nutrients as the pine plants in the natural regeneration under the seed tree. In the vegetation inmediately outside the fertilized area only traces of the added nutrients could be found. An analysis of the root distribution revealed that the suppressed pine plants in the competition zone had their roots spread chiefly in the deeper layers while the roots system of the older tree dominated the upper layers where the supply of nutrients available to vegetation is largest. At a distance of 5-7 m from the tree, where its competition began to decrease, the small plants were found to have a considerably more superficial root system than what thye had nearer to the tree.

Authors/Creators:Björkman, Erik and Lundeberg, Göran
Title:Studies of root competition in a poor pine forest by supply of labelled nitrogen and phosphorus
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1971
Number:94
Number of Pages:16
Place of Publication:Stockholm
Publisher:Skogshögskolan
ISSN:0039-3150
Language:English
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant and forest protection
Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Forestry
Keywords:Pinus silvestris, roots, nitrogen, phosphorus, root competition
URN:NBN:urn:nbn:se:slu:epsilon-9-104
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-104
ID Code:5771
Department:Predecessors to SLU > Royal School of Forestry
Deposited By: Skogsbiblioteket Umeå
Deposited On:01 Mar 2011 00:00
Metadata Last Modified:15 Dec 2015 17:52

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