allelochemical availability in temperate soils
tundra Recent work has shown that plant litter inputs fuel microbial growth in autumn and winter resulting in a large increase of microbial biomass under the snow pack in tundra soils. This winter-adapted microbial community can grow at low temperatures (−5to3 ◦ C) and depletes the litter of easily...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.323.717 2023-05-15T18:40:14+02:00 allelochemical availability in temperate soils S. K. Schmidt D. A. Lipson The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.323.717 http://amo.colorado.edu/pl_and_soil.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.323.717 http://amo.colorado.edu/pl_and_soil.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://amo.colorado.edu/pl_and_soil.pdf Key words allelopathy litter decomposition nitrogen immobilization phenolic compounds snow-covered soils text 2003 ftciteseerx 2016-09-04T00:25:05Z tundra Recent work has shown that plant litter inputs fuel microbial growth in autumn and winter resulting in a large increase of microbial biomass under the snow pack in tundra soils. This winter-adapted microbial community can grow at low temperatures (−5to3 ◦ C) and depletes the litter of easily degraded constituents, such as simple phenolic compounds, and immobilizes nitrogen. During snowmelt there is a die-off of this winter microbial community (due to starvation and intolerance to higher soil temperature) resulting in a release of nitrogen that can be utilized by plants and the summer microbial community. The summer microbial community can tolerate higher temperatures (5 to 20 ◦ C) and utilizes mostly plant root exudates for growth. These yearly cycles of microbial growth dynamics have profound implications for both nutrient and alleochemical availability to plants. Firstly, these results show that release (from litter) and degradation of plant phenolic compounds (potential alleochemicals) occurs before plant growth commences in the spring. Secondly, nitrogen (N) immobilized by over-winter microbial growth is released back to the soil during and after snowmelt, thus becoming available to plants. Both of these results need to be incorporated in the design of experiments to explore plant-plant interactions. Many experiments in which chemicals (or fresh litter) are incorporated during plant growth do not reflect the fact that these two events are temporally uncoupled in many natural systems. Text Tundra Unknown |
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Key words allelopathy litter decomposition nitrogen immobilization phenolic compounds snow-covered soils |
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Key words allelopathy litter decomposition nitrogen immobilization phenolic compounds snow-covered soils S. K. Schmidt D. A. Lipson allelochemical availability in temperate soils |
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Key words allelopathy litter decomposition nitrogen immobilization phenolic compounds snow-covered soils |
description |
tundra Recent work has shown that plant litter inputs fuel microbial growth in autumn and winter resulting in a large increase of microbial biomass under the snow pack in tundra soils. This winter-adapted microbial community can grow at low temperatures (−5to3 ◦ C) and depletes the litter of easily degraded constituents, such as simple phenolic compounds, and immobilizes nitrogen. During snowmelt there is a die-off of this winter microbial community (due to starvation and intolerance to higher soil temperature) resulting in a release of nitrogen that can be utilized by plants and the summer microbial community. The summer microbial community can tolerate higher temperatures (5 to 20 ◦ C) and utilizes mostly plant root exudates for growth. These yearly cycles of microbial growth dynamics have profound implications for both nutrient and alleochemical availability to plants. Firstly, these results show that release (from litter) and degradation of plant phenolic compounds (potential alleochemicals) occurs before plant growth commences in the spring. Secondly, nitrogen (N) immobilized by over-winter microbial growth is released back to the soil during and after snowmelt, thus becoming available to plants. Both of these results need to be incorporated in the design of experiments to explore plant-plant interactions. Many experiments in which chemicals (or fresh litter) are incorporated during plant growth do not reflect the fact that these two events are temporally uncoupled in many natural systems. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
S. K. Schmidt D. A. Lipson |
author_facet |
S. K. Schmidt D. A. Lipson |
author_sort |
S. K. Schmidt |
title |
allelochemical availability in temperate soils |
title_short |
allelochemical availability in temperate soils |
title_full |
allelochemical availability in temperate soils |
title_fullStr |
allelochemical availability in temperate soils |
title_full_unstemmed |
allelochemical availability in temperate soils |
title_sort |
allelochemical availability in temperate soils |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.323.717 http://amo.colorado.edu/pl_and_soil.pdf |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
http://amo.colorado.edu/pl_and_soil.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.323.717 http://amo.colorado.edu/pl_and_soil.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766229505201930240 |