Gylfadóttir, Thórey; Helgadóttir, Áslaug and Høgh-Jensen, Henning (2007) Consequences of including adapted white clover in northern European grassland: transfer and deposition of nitrogen. Plant and Soil, 297, pp. 93-104.
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Summary
The interspecific transfer of nitrogen (N) between white clover (Trifolium repens) and smooth meadow grass (Poa pratensis) in legume-based grasslands was assessed under North European field conditions using 15N individual plant leaf labelling. On average 50% of N in the grass was transferred from the white clover and about 6% of N in white clover was transferred from the grass. This corresponds to 2.5 and 0.3 g N m-2 being transferred over the growing season between the two species respectively and demonstrates that a significant part of the total N of the grass is coming through interspecific transfer. The majority of the 15N transferred was within a period of 20 days at relatively low soil temperatures. This implies that there is a need for a new focus on direct transfer pathways or exudation and transfer of organic N sources. Rhizodeposition in the top 10 cm of the soil was found to be 2.98 g N m-2 on average over the growing season for the grass and white clover mixture. Inclusion of adapted white clover varieties in the low-input grassland systems of northern Europe will lead to a substantial contribution of N.
EPrint Type: | Journal paper |
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Keywords: | Bi-directional N transfer, grassland, legumes, N dynamics, N transfer, rhizodeposition |
Subjects: | Environmental aspects > Landscape and recreation Farming Systems > Farm nutrient management Environmental aspects > Biodiversity and ecosystem services |
Research affiliation: | Denmark > KU - University of Copenhagen |
Deposited By: | Jensen, Dr Henning Høgh |
ID Code: | 11466 |
Deposited On: | 09 Oct 2007 |
Last Modified: | 12 Apr 2010 07:35 |
Document Language: | English |
Status: | Published |
Refereed: | Peer-reviewed and accepted |
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