Effet à court terme de la mise en culture sur le statut organique et l’agrégation d’un sol ferrallitique argileux du Congo
| Autor: | Bernard Barthès, B. Nyeté, Ernest Kouakoua, Christian Hartmann, Georges-Henri Sala |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Canadian Journal of Soil Science. 76:493-499 |
| ISSN: | 1918-1841 0008-4271 |
| DOI: | 10.4141/cjss96-061 |
| Popis: | Cultivation of oxisols of the Niari Valley (Congo) leads to considerable decline in the soil organic carbon content and structural stability in a few years. The objective of this study was to estimate the very short-term effects of cultivation on organic status and macroaggregate (> 0.2 mm) stability of a soil which had been under savanna for 20 yr. Another objective was to identify the determinants of macroaggregate stability.On one hand, after 5 mo of manual or mechanized cultivation, stable macroaggregate content MA decreased significantly in the 0- to 10-cm layer (7% on average); soil organic carbon stock S did not (6% on average), whereas the decrease in soil organic carbon content C was significant only under mechanized cultivation (13.5% on average, vs. 7% under manual cultivation). On the other hand, the influence of cultivation on MA, S and C was not significant in the 10- to 20-cm layer (variations |
| Databáze: | OpenAIRE |
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