Effects of frost on shaded and exposed spruce and pine seedlings planted in the field
Spruce (Piceaabies L.) and pine (Pinussylvestris L.) seedlings were planted at different positions relative to artificial tree shades. Two sites in northern Sweden known as difficult to regenerate owing to frosts during the growing season were used. No deficiency of soil water was recorded during th...
Published in: | Canadian Journal of Forest Research |
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Language: | English |
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/x87-184 http://www.nrcresearchpress.com/doi/pdf/10.1139/x87-184 |
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crcansciencepubl:10.1139/x87-184 2024-04-28T08:32:36+00:00 Effects of frost on shaded and exposed spruce and pine seedlings planted in the field Lundmark, Tomas Hällgren, Jan-Erik 1987 http://dx.doi.org/10.1139/x87-184 http://www.nrcresearchpress.com/doi/pdf/10.1139/x87-184 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Forest Research volume 17, issue 10, page 1197-1201 ISSN 0045-5067 1208-6037 Ecology Forestry Global and Planetary Change journal-article 1987 crcansciencepubl https://doi.org/10.1139/x87-184 2024-04-09T06:56:24Z Spruce (Piceaabies L.) and pine (Pinussylvestris L.) seedlings were planted at different positions relative to artificial tree shades. Two sites in northern Sweden known as difficult to regenerate owing to frosts during the growing season were used. No deficiency of soil water was recorded during the growing season and all seedlings experienced similar temperature conditions during night frosts. Exposed seedlings received on clear days 7 h more of direct solar radiation than did shaded seedlings. After the first severe night frost in August, discoloration of needles and a decrease in chlorophyll concentration as well as lowered photosynthetic rates were more pronounced for the exposed seedlings. This was more obvious for spruce than pine seedlings. The differences in radiant load seem to be of ultimate importance for the results observed. It is proposed that photoinhibition and subsequent photooxidation of planted seedlings occur in the field when severe night frosts are followed by clear days with high irradiance. Article in Journal/Newspaper Northern Sweden Canadian Science Publishing Canadian Journal of Forest Research 17 10 1197 1201 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Ecology Forestry Global and Planetary Change |
spellingShingle |
Ecology Forestry Global and Planetary Change Lundmark, Tomas Hällgren, Jan-Erik Effects of frost on shaded and exposed spruce and pine seedlings planted in the field |
topic_facet |
Ecology Forestry Global and Planetary Change |
description |
Spruce (Piceaabies L.) and pine (Pinussylvestris L.) seedlings were planted at different positions relative to artificial tree shades. Two sites in northern Sweden known as difficult to regenerate owing to frosts during the growing season were used. No deficiency of soil water was recorded during the growing season and all seedlings experienced similar temperature conditions during night frosts. Exposed seedlings received on clear days 7 h more of direct solar radiation than did shaded seedlings. After the first severe night frost in August, discoloration of needles and a decrease in chlorophyll concentration as well as lowered photosynthetic rates were more pronounced for the exposed seedlings. This was more obvious for spruce than pine seedlings. The differences in radiant load seem to be of ultimate importance for the results observed. It is proposed that photoinhibition and subsequent photooxidation of planted seedlings occur in the field when severe night frosts are followed by clear days with high irradiance. |
format |
Article in Journal/Newspaper |
author |
Lundmark, Tomas Hällgren, Jan-Erik |
author_facet |
Lundmark, Tomas Hällgren, Jan-Erik |
author_sort |
Lundmark, Tomas |
title |
Effects of frost on shaded and exposed spruce and pine seedlings planted in the field |
title_short |
Effects of frost on shaded and exposed spruce and pine seedlings planted in the field |
title_full |
Effects of frost on shaded and exposed spruce and pine seedlings planted in the field |
title_fullStr |
Effects of frost on shaded and exposed spruce and pine seedlings planted in the field |
title_full_unstemmed |
Effects of frost on shaded and exposed spruce and pine seedlings planted in the field |
title_sort |
effects of frost on shaded and exposed spruce and pine seedlings planted in the field |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/x87-184 http://www.nrcresearchpress.com/doi/pdf/10.1139/x87-184 |
genre |
Northern Sweden |
genre_facet |
Northern Sweden |
op_source |
Canadian Journal of Forest Research volume 17, issue 10, page 1197-1201 ISSN 0045-5067 1208-6037 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/x87-184 |
container_title |
Canadian Journal of Forest Research |
container_volume |
17 |
container_issue |
10 |
container_start_page |
1197 |
op_container_end_page |
1201 |
_version_ |
1797589731340451840 |