| Autor: |
Bationo, Andre, Waswa, Boaz, Kihara, Job, Kimetu, Joseph, Bado, B.V., Bationo, A., Lompo, F., Cescas, M.P., Sedogo, M.P |
| Zdroj: |
Advances in Integrated Soil Fertility Management in sub-Saharan Africa: Challenges & Opportunities; 2007, p171-177, 7p |
| Abstrakt: |
The effects of cowpea (Vigna unguiculata) and groundnut (Arachis hypogea) on succeeding sorghum yields, soil mineral nitrogen and N recoveries were studied during three years (2000 to 2002) in a weakly acid Ultisol of the agronomic research station of Farakô-Ba located in the Guinean zone of Burkina Faso. A field agronomic experiment with a factorial 3×4 design of three crop rotations (cowpea-sorghum, groundnut-sorghum and sorghum-sorghum) as first factor and four fertilizer treatments (PK fertilizer, NPK, NPK+ Manure and control) as second factor in a split plot arrangement with four replications. Highest yields were obtained when sorghum was rotated with legumes while lowest yields were obtained in mono cropping of sorghum. Compared to mono cropping, sorghum could produced 2.9 and 3.1 times more grain yields when it was rotated with groundnut or cowpea respectively. A better use of fertilizer N was observed in legume-sorghum rotations. In continuous sorghum, fertilizer N use efficiency (NUE) was 20%. But in Cowpea-Sorghum and Groundnut-Sorghum rotations, NUEs were 28 and 37% respectively. Legume-sorghum rotations increased sol mineral nitrogen. The soils of legume-sorghum rotations provided more nitrogen to succeeding sorghum compared to mono cropping of sorghum and the highest total N uptake by sorghum was observed in legume-sorghum rotations [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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