| Autor: |
Diouf, A, Diop, TA, Ndoye, I, Gueye, M |
| Jazyk: |
angličtina |
| Rok vydání: |
2010 |
| Předmět: |
|
| Zdroj: |
African Journal of Biotechnology; Vol 7, No 6 (2008) |
| ISSN: |
1684-5315 |
| Popis: |
A pot experiment was carried out in a green house at Bel Air station to determine effect of phosphorus on the growth of Gliricidia sepium in presence of rhizobial strains and an arbuscular mycorrhizafungus. A factorial 3 factors block was designed with arbuscular mycorrhizal fungus Glomus aggregatum, phophorus fertilization as triple super phosphate and rhizobial inoculation strains ISRA 604 and ISRA 605 applied on G. sepium seedlings. A non nitrogen fixing tree (NFT), Cassia siamea was used as reference tree for estimating the nitrogen fixation using the 15N isotope dilution technique. Mycorrhizal infection, nodulation, plant growth, P and N contents, 15N atom % excess (15Nae) and N fixed were determined. The results showed that the rhizobium strain ISRA 604 induced nodulation more than ISRA 605 in G. sepium with an increase of 38.28% for nodules number. Frequency (%F) and intensity (%M) of mycorrhization were highest at 0, 20 and 40 mg P kg-1 soil applied however rhizobial inoculation has influenced frequency of mycorrhization. In the rhizobium- AM fungus interaction, plant shoot total N content increased when trees were inoculated with G. aggregatum whatever the rhizobial strain inoculated. Roots N fixed (Ndfa) increased when plant was inoculated with ISRA 604 andamended with 20 mg P kg-1 soil. The inoculated plants exhibited the highest total nitrogen in whole plant as well as in shoots and roots than in non-inoculated and reference plants. G. sepium growthbenefited from selected rhizobia and AM fungus inoculations and P application in a sandy soil. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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