| Autor: |
F. Lompo, P. M. Sedogo, André Bationo, Michel Pierre Cescas, Z. Segda, B. V. Bado |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Innovations as Key to the Green Revolution in Africa ISBN: 9789048125418 |
| Popis: |
The effects of previous cowpea (Vigna unguiculata) and annual fallow on N recoveries, succeeding sorghum yields and soil properties were studied using a 5-year (1995–1999)-old field experiment at Kouare (11°59′ North, 0°19′ West and 850 m altitude) in Burkina Faso. A 5 × 4 factorial design in a split plot arrangement with five rotation treatments and four fertilizer treatments was used. Total N uptake by succeeding sorghum increased from 26 kg N ha–1 in monocropping of sorghum to 31 and 48 kg N ha–1 when sorghum was rotated with fallow or cowpea, respectively. Nitrogen derived from fertilizer increased from 10% in monocropping of sorghum to 22 and 26% when sorghum was rotated with fallow or cowpea, respectively. While fallow did not increase N derived from soil, cowpea doubled the quantity of N derived from soil (Ndfs). Sorghum grain yields increased from 75 to 100% when sorghum was rotated with fallow or cowpea, respectively. All rotation treatments decreased soil organic C and N but soil organic C was highest in fallow–sorghum rotation. It was concluded that cowpea–sorghum rotation was more effective than fallow–sorghum rotation and five management options were suggested to improve traditional system productivity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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