Accueil
Sélection de la langue
Adresse
Infodoc : Réseau des bibliothèques et centres de documentation d'AgroParisTechFrance
contact
Array
(
[TITRE] => <b>Type de document : </b>
[TITRE_CLEAN] => Type de document
[OPAC_SHOW] => 1
[TYPE] => list
[AFF] => Tiré à part
[ID] => 4
[NAME] => cp_typdoc
[DATATYPE] => integer
[VALUES] => Array
(
[0] => 7
)
)
| Titre : |
Assessment of genetic variability for N2 fixation between and within provenances of Leucaena leucocephala and Acacia albida estimated by 15N labelling techniques
|
| Titre de série : | Plant and soil, Vol 127 - n°2 |
| Auteur(s) : |
N. Sanginga, Auteur (et co-auteur)
G.D. Bowen, Auteur (et co-auteur) S.K.A. Danso, Auteur (et co-auteur) |
| Type de document : | Tiré à part |
| Sujets : | Faidherbia albida ; Variation génétique ; Leucaena leucocephala ; Formation de nodosités |
| Résumé : |
Nitrogen fixed in 13 provenances of Acacia albida and 11 isolines of Leucaena leucocephala inoculated with effective Rhizobium strains was measured by 15N techniques and the total N difference method. In the test soil, on the average, L. leucocephala derived about 65% of its total N from atmospheric N2 fixation compared to about 20% by A. albida. Significant differences in the percentage of N derived from atmospheric N2 (% Ndfa) occurred, between provenances or isolines within species. The % Ndfa ranged from 37 to 74% within L. leucocephala and from 6 to 37 within A. albida; (equivalent to 20–50 mg N plant−1 and 4–37 mg N plant−1 for the two species over three months, respectively) and was correlated with the nodule mass (r=0.91). The time course of N2 fixation of three selected prove[...] Nitrogen fixed in 13 provenances of Acacia albida and 11 isolines of Leucaena leucocephala inoculated with effective Rhizobium strains was measured by 15N techniques and the total N difference method. In the test soil, on the average, L. leucocephala derived about 65% of its total N from atmospheric N2 fixation compared to about 20% by A. albida. Significant differences in the percentage of N derived from atmospheric N2 (% Ndfa) occurred, between provenances or isolines within species. The % Ndfa ranged from 37 to 74% within L. leucocephala and from 6 to 37 within A. albida; (equivalent to 20–50 mg N plant−1 and 4–37 mg N plant−1 for the two species over three months, respectively) and was correlated with the nodule mass (r=0.91). The time course of N2 fixation of three selected provenances (low, intermediate and good fixers) was followed at 12 weekly intervals over a 36 week period. The % Ndfa of all provenances and isolines increased with time; and except for one of the L. leucocephala provenances, % Ndfa was similar within species at the 36 weeks harvest. There was a significant correlation between % Ndfa and the amount of N2 fixed (r=0.96). Significant interactions occurred between provenances and N treatments and often growth of uninoculated but N fertilized plants was less variable than for inoculated unfertilized plants. |
| Date de publication : | 1990 |
| Format : | pp. 169-178 / tabl., réf. |
| Langue(s) : | Anglais |
| Lien vers la notice : | https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=147213 |
Exemplaires (1)
| Localisation | Emplacement | Pôle | Section | Cote | Support | Disponibilité |
|---|---|---|---|---|---|---|
| Kourou | Archives | AgroParisTech-Kourou | TP5211 (E) | Papier Périodique | Empruntable Disponible |