Compost and fertilizer mineralization effects on soil and harvest in parkland agroforestry systems in the south-Sudanese zone of Burkina Faso

摘要: Decomposition of, and the subsequent nutrient release from tree leaf litter as well external inputs of nutrients are important in traditional agroforestry parklands West Africa. The management resources is essential to optimize crop performance soil fertility. To explore temporal spatial such options has been overall objective this study. Specifically, thesis investigated: (i) decomposition patterns litters Faidherbia albida Vitellaria paradoxa; (ii) limitation microbial respiration, a result low nitrogen (N) phosphorus (P) F. V. paradoxa parklands; (iii) effects applications combined compost urea on maize yield parklands. lost more mass than paradoxa. However, rate increased presence or following application inorganic fertilizers. Soil respiration was mainly limited by P-fixation, but N also limiting. Two growth peaks were observed when excess carbon P present, suggesting that either two pools sequentially available microbes communities do exist. Respiration tests indicated availability microorganisms higher under canopy outside it. Maize similar with addition urea, compost, combination if applied at an equivalent N-content. driest year, had greatest effect increase compared control treatments. canopies up 2.3 times canopies, while it 0.6 0.8 canopies. relatively better dry year. Compost-N fertilizer-N recoveries shoot biomass low, indicating large proportion shoot-N derived soil. Also, albida, fertilizer lower canopy, implying N-pool readily plants trees. In conclusion, there potential improve mixing litter. Thus, can be useful quality, rather being burnt nowadays practiced farmers. Application offers option cheaper only fertilizers manageable applications.