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The effect of inorganic nutrients on water economy and hardiness of conifers.

1, The effect of varying potassium, calcium, and magnesium levels on water content, transpiration rate, and the initial phase of development of frost hardiness of Pinus silvestris L. seedlings

Christersson, Lars (1973). The effect of inorganic nutrients on water economy and hardiness of conifers. Technical Report. Stockholm: Predecessors to SLU > Royal School of Forestry, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 103
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Abstract

The effect of varying amounts of potassium, calcium, and magnesium on water contents, transpiration rates, and frost hardiness of unhardened and 3 weeks' hardened seedlings of Pinus silvestris L. was investigated. The seedlings were 12 and 15 weeks old, respectively. A hardening period of three weeks (short days: 8 hours light and low temperature: 3°C) decreased the water content of the shoots by 1-6 per cent, and the transpiration rates by about 50 per cent. Increased potassium content increased the water content of the shoot, but decreased the transpiration rate. Increased magnesium content increased the water content, but did not affect transpiration rate. Increased calcium content had no significant effect on water content or transpiration rate. Different contents of potassium, calcium, and magnesiuin had no effect, or only a very small effect, on frost hardiness in unhardened or 3 weeks' hardened seedlings. A transport of potassium from the root to the shoot during hardening was demonstrated and this transport is discussed in connection with winter survival.

Authors/Creators:Christersson, Lars
Title:The effect of inorganic nutrients on water economy and hardiness of conifers.
Subtitle:1, The effect of varying potassium, calcium, and magnesium levels on water content, transpiration rate, and the initial phase of development of frost hardiness of Pinus silvestris L. seedlings
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1973
Number:103
Number of Pages:26
Place of Publication:Stockholm
Publisher:Skogshögskolan
ISBN for printed version:91-38-01559-5
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:conifers, potassium, calcium, magnesium, transpiration, frost hardiness, seedlings, Pinus silvestris
URN:NBN:urn:nbn:se:slu:epsilon-9-95
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-95
ID Code:5717
Department:Predecessors to SLU > Royal School of Forestry
Deposited By: Skogsbiblioteket Umeå
Deposited On:22 Feb 2011 00:00
Metadata Last Modified:13 Nov 2015 13:00

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