| Autor: |
Wouters, JFR., Wakana, M., Opdecamp, L. |
| Jazyk: |
English<br />French |
| Rok vydání: |
1986 |
| Předmět: |
|
| Zdroj: |
Tropicultura, Vol 4, Iss 1, Pp 20-26 (1986) |
| Druh dokumentu: |
article |
| ISSN: |
0771-3312 |
| Popis: |
Sensibility to soil aluminium concentration of the common bean Phaseolus vulgaris in the African "Great Lakes" region. The climate of the African region around the "Great Lakes" induces a strong process of soil weathering which eventually leads to a strong aluminium saturation of the absorption complex, as expressed by the "m" index of Kamprath. The response to aluminium toxicity of the common bean cv. Diacol Calima, a widely grown variety in Burundi, has been studied in pot trials in two ways : (1) Using superficial soil samples of "humiferous high elevation kaolisols" whose "m" index varied between 4 and 92 ; (2) On culture condition consisting of an inert substrate complemented with a nutritional solution to which a serie of soluble aluminium concentrations were added. Under soil condition, biomass produced after a period of 25 days of growth, decreased as from "m" = 33. The number of Rhizobium nodules decreased drastically with aluminium toxicity becoming negligible at "m" - 33. On culture media, rising concentration of aluminium affected growth adversely as well, although root growth inhibition was less pronounced than under soil condition. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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