The contribution of grass and clover root turnover to N leaching
Sources of inorganic and organic N leaching from grass-clover mixtures at field sites in Denmark, Germany and Iceland were investigated. Grass or clover was labelled with 15N-urea four times (autumn 2007, spring, summer and autumn 2008) prior to the leaching season in autumn and winter 2008. Soil wa...
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ftorgprints:oai:orgprints.org:17880 2023-05-15T16:50:26+02:00 The contribution of grass and clover root turnover to N leaching Rasmussen, Jesper Helgadóttir, Á. Frankow-Lindberg, B. Loges, R. Eriksen, J. Schnyder, H. 2010 application/pdf https://orgprints.org/id/eprint/17880/ en eng /id/eprint/17880/4/17880.pdf Rasmussen, Jesper; Helgadóttir, Á.; Frankow-Lindberg, B.; Loges, R. and Eriksen, J. (2010) The contribution of grass and clover root turnover to N leaching. In: Schnyder, H. (Ed.) Grassland Science in Europe 15, pp. 1028-1030. urn:ISBN:978-3-86944-021-7 Crop combinations and interactions Nutrient turnover Conference paper, poster, etc. NonPeerReviewed 2010 ftorgprints 2022-12-11T06:55:53Z Sources of inorganic and organic N leaching from grass-clover mixtures at field sites in Denmark, Germany and Iceland were investigated. Grass or clover was labelled with 15N-urea four times (autumn 2007, spring, summer and autumn 2008) prior to the leaching season in autumn and winter 2008. Soil water was sampled at 30 cm depth and analyzed for 15N-enrichment of dissolved inorganic N (DIN) and dissolved organic N (DON). Most 15N was recovered in DON for both labelled grass and clover at all sites. At the Danish site, grass and clover contributed more to the DON pool than the DIN whereas the opposite was observed at the German and Icelandic sites. The results show that both clover and grass contribute directly to N leaching from the root zone in mixtures, and that clover contribution is higher than grass. Furthermore, the present study indicates that roots active in the growth season prior to the drainage period contribute more to N leaching than roots active in the growth season the previous year, which is consistent with estimates of root longevity at the three sites. Conference Object Iceland Organic Eprints (Danish Research Centre for Organic Farming, DARCOF) |
institution |
Open Polar |
collection |
Organic Eprints (Danish Research Centre for Organic Farming, DARCOF) |
op_collection_id |
ftorgprints |
language |
English |
topic |
Crop combinations and interactions Nutrient turnover |
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Crop combinations and interactions Nutrient turnover Rasmussen, Jesper Helgadóttir, Á. Frankow-Lindberg, B. Loges, R. Eriksen, J. The contribution of grass and clover root turnover to N leaching |
topic_facet |
Crop combinations and interactions Nutrient turnover |
description |
Sources of inorganic and organic N leaching from grass-clover mixtures at field sites in Denmark, Germany and Iceland were investigated. Grass or clover was labelled with 15N-urea four times (autumn 2007, spring, summer and autumn 2008) prior to the leaching season in autumn and winter 2008. Soil water was sampled at 30 cm depth and analyzed for 15N-enrichment of dissolved inorganic N (DIN) and dissolved organic N (DON). Most 15N was recovered in DON for both labelled grass and clover at all sites. At the Danish site, grass and clover contributed more to the DON pool than the DIN whereas the opposite was observed at the German and Icelandic sites. The results show that both clover and grass contribute directly to N leaching from the root zone in mixtures, and that clover contribution is higher than grass. Furthermore, the present study indicates that roots active in the growth season prior to the drainage period contribute more to N leaching than roots active in the growth season the previous year, which is consistent with estimates of root longevity at the three sites. |
author2 |
Schnyder, H. |
format |
Conference Object |
author |
Rasmussen, Jesper Helgadóttir, Á. Frankow-Lindberg, B. Loges, R. Eriksen, J. |
author_facet |
Rasmussen, Jesper Helgadóttir, Á. Frankow-Lindberg, B. Loges, R. Eriksen, J. |
author_sort |
Rasmussen, Jesper |
title |
The contribution of grass and clover root turnover to N leaching |
title_short |
The contribution of grass and clover root turnover to N leaching |
title_full |
The contribution of grass and clover root turnover to N leaching |
title_fullStr |
The contribution of grass and clover root turnover to N leaching |
title_full_unstemmed |
The contribution of grass and clover root turnover to N leaching |
title_sort |
contribution of grass and clover root turnover to n leaching |
publishDate |
2010 |
url |
https://orgprints.org/id/eprint/17880/ |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
/id/eprint/17880/4/17880.pdf Rasmussen, Jesper; Helgadóttir, Á.; Frankow-Lindberg, B.; Loges, R. and Eriksen, J. (2010) The contribution of grass and clover root turnover to N leaching. In: Schnyder, H. (Ed.) Grassland Science in Europe 15, pp. 1028-1030. urn:ISBN:978-3-86944-021-7 |
_version_ |
1766040584795979776 |