Differential response to tree fallows in rotational woodlot systems In semi-arid Tanzania: post-fallow maize yield, nutrient uptake, And soil nutrients

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dc.contributor.authorKimaro, A.A.
dc.contributor.authorTimmer, V.R.
dc.contributor.authorChamshama, S.A.O.
dc.contributor.authorMugasha, A.G.
dc.contributor.authorKimaro, D.A.
dc.date.accessioned2022-09-12T04:59:09Z
dc.date.available2022-09-12T04:59:09Z
dc.date.issued2008
dc.descriptionJournal articleen_US
dc.description.abstractAgroforestry tree species producing high quality litter may enhance post-fallow soil nutrient availability and crop yields through mineralization of soil organic matter and green manure. A split-plot field experiment was used to evaluate maize yield and soil N and P status after fallowing indigenous and exotic tree species of contrasting litter quality. Responses were compared with recommended inorganic fertilizer use. The objective was to assess efficacy of 5-year tree fallows in improving soil productivity to screen species for increased crop yield under rotational woodlot culture, an agroforestry system mainly used for on-farm fuelwood production in semi-arid Tanzania. Post- fallow maize yield and soil nutrients differed significantly among tree fallows. Low C:N and L:N ratios enhanced nutrient release from slash. Acacia polyacantha (indigenous) and Gliricidia sepium fallows doubled maize yield compared to the natural fallow probably due to high soil N and P levels resulting from net release by high quality foliage. First season maize yield was similar to that from combined N and P fertilizers indicating high capacity of the fallows to improve crop yields and reduce fertilizer inputs usually unaffordable to small-scale farmers. Comparatively low maize yield and soil N and P levels after exotic Acacia crassicarpa and Acacia mangium fallows were attributed to net N immobilization by poor quality litter during growing seasons. This study suggests that rotational woodlot systems utilizing tree species with high litter quality can improve both post-fallow maize yield and soil fertility as well as produce sufficient fuelwood. In this aspect, A. polyacantha would be the most appropriate species.en_US
dc.identifier.urihttp://www.suaire.sua.ac.tz/handle/123456789/4541
dc.language.isoenen_US
dc.publisherelservieren_US
dc.subjectAcaciaen_US
dc.subjectLitter qualityen_US
dc.subjectMaize yielden_US
dc.subjectSemi-ariden_US
dc.subjectSemi-ariden_US
dc.subjectWoodloten_US
dc.titleDifferential response to tree fallows in rotational woodlot systems In semi-arid Tanzania: post-fallow maize yield, nutrient uptake, And soil nutrientsen_US
dc.typeArticleen_US

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