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Details van artikel 12 van 185 gevonden artikelen
| Titel: |
Biological nitrogen fixation by Pachecoa venezuelensis in two East Venezuelan savanna soils |
| Auteur: |
Lisbeth MARCANO Marcial GONZÁLEZ Angel LEAL Vicente MICHELENA |
| Verschenen in: |
Revista científica UDO agrícola |
| Paginering: | Jaargang 1 (2001) nr. 1 pagina's 64-69 |
| Jaar: |
2001 |
| Inhoud: |
With the purpose of characterizing the nodulation process, the infectiveness and effectiveness of rizobia strains and theefficiency of the symbiosis Rhizobium spp-leguminous with nitrogen application in two soils of the Venezuelan Orinoquia, itwas carried out an experiment under greenhouse conditions using Pachecoa venezuelensis a forage shrub leguminous. Thestatistical arrangement was split plot with four repetitions and sixty four combinations of treatments. The main plots were thetwo types of soils: Jusepín and El Tigre; the subplots the two levels of edaphic nitrogen: 0 and 20 kgN.ha-1 and the subsubplotsthe rizobia strains : UDO-R1, RC-14, the combination of both strains and without inoculation. Plants were harvestedfour months after planting. It was measured plants height; shoot, root and nodules dry weight; chlorophyll (a + b)concentration and foliage nitrogen. The plants grown in Jusepín soil reached the biggest height average (77.67 cm) and thebiggest shoot (6.50 g/plant), root (9.81 g/plant ) and nodules (0.05 g/plant ) dry weights. Significant effect was found inRhizobium spp - Pachecoa venezuelensis interaction in chlorophyll (a + b) concentration . The plants grown in El Tigre soilwith neither inoculums nor nitrogen contained more chlorophyll (5.69 mg/l/plant) than other treatments. The biggest nitrogenpercentage (2.12%) it was in the treatment non inoculated and without nitrogen in both soils. Native rizobia exist in bothJusepín and El Tigre soils able to infect Pachecoa. The edaphic nitrogen exerted a restrictive effect in both chlorophyll contentand foliage nitrogen when Rhizobium spp inoculated Pachecoa venezuelensis. |
| Uitgever: |
Universidad de Oriente Press (provided by DOAJ) |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 12 van 185 gevonden artikelen
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