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Details van artikel 7 van 10 gevonden artikelen
| Titel: |
Nitrogen Fixation by Red Clover (Trifolium pratense L.) Grown in Mixtures with Timothy (Phleum pratense L.) at Different Levels of Nitrogen Fertilization |
| Auteur: |
Nesheim, Lars Øyen, Jorulf |
| Verschenen in: |
Acta agriculturae Scandinavica. Section B, Soil and plant science |
| Paginering: | Jaargang 44 (1994) nr. 1 pagina's 28-34 |
| Jaar: |
1994-03-01 |
| Inhoud: |
In a field study in south-western (Særheim) and northern Norway (Vågønes) the methods of 15N isotope dilution and N-difference were used to determine symbiotical N2 fixation in red clover grown in a mixture with timothy. Where no N fertilizer was used 210 kg N ha-1 was fixed at Særheim and 128 kg at Vågønes, as estimated by isotope dilution. Application of inorganic N strongly depressed the yield of fixed N, mainly due to a decrease in the proportion of clover in the sward. The percentage of N derived from symbiosis was less influenced by the N fertilization. Estimates of fixed N yield by the two methods were significantly correlated. The amounts of fixed N estimated by the N-difference method were, however, significantly higher than the N yields determined by the isotope dilution technique. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 7 van 10 gevonden artikelen
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