Screening of exotic and local tree species for soil fertility maintenance for sustainable maize production in northern Ghana.
1998
Kombiok, J. M. | Rudat, H. | Frey, E. | Renard, G. (Ed.) | Neef, A. (Ed.) | Becker, K (Ed.) | Oppen, M. Von
A long-term field experiment was started in 1990 at the Savanna Agricultural Research Institute (SARI) Nyankpala, Ghana, with the objective of screening 5 tree species for their role in soil fertility maintenance for maize production. Gliricidia sepium gave the highest maize yields followed by Leucaena leucocephala, control (no trees), Butyrospermum parkii (sheanut [Vitellaria paradoxa]), Parkia biglobosa (dawadawa) and Acacia auriculiformis, although maize yields varied between the tree species treatments depending on the N fertilizer treatment applied (0, 40 or 80 kg/ha). After four years of the experiment only G. sepium, L. leucocephala and A. auriculiformis could be pruned giving an average biomass of 4.8, 3.6 and 2.5 t ha-1 respectively in 1995. The rest of the trees could not be pruned because of their slow growing nature. Soil analysis before and 4 years after the start of the experiment revealed an increase in soil nitrogen only in plots of G. sepium and L. leucocephala where the pruned biomass has been incorporated into the soil for three consecutive years.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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