A reduced fraction of plant N derived from atmospheric N (%Ndfa) and reduced rhizobial nifH gene numbers indicate a lower capacity for nitrogen fixation in nodules of white clover exposed to long-term CO<sub>2</sub> enrichment
Using the δ<sup>15</sup>N natural abundance method, we found that the fraction of nitrogen derived from atmospheric N (%Ndfa) in field-grown white clover (<i>Trifolium repens</i> L.) plants was significantly lower (72.0% vs. 89.8%, <i>p</i> = 0.047 in a grassland...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2013-12-01
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| Series: | Biogeosciences |
| Online Access: | http://www.biogeosciences.net/10/8269/2013/bg-10-8269-2013.pdf |