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Potential of Acacia angustissima, Leucaena pallida and Mimosa scabrella in agroforestry systems on a Rwandan Ferralsol

Mukangango, Marguerite (2019). Potential of Acacia angustissima, Leucaena pallida and Mimosa scabrella in agroforestry systems on a Rwandan Ferralsol. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-402-0
eISBN 978-91-7760-403-7
[Doctoral thesis]

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Abstract

Agroforestry using coppicing legume trees and shrubs is a way to improve livestock fodder quality and soil fertility in the tropics. However, tree establishment and appropriate management are challenging, hampering their integration into agriculture and livestock systems. This thesis evaluates the biomass production by Acacia angustissima, Leucaena pallida and Mimosa scabrella legume tree species grown on a Ferralsol in Southern Rwanda, determines their effects on fodder quality and assesses the fertiliser quality of the resulting manure and its effect on a maize crop yield and the fertility status of a Rwandan Ferralsol.

In field studies, biomass production and nutritive value of the three agroforestry species when subjected to 0.3 and 1.0 m cutting height were determined and the effects of micro-dosing manure, fertiliser and lime on soil properties and maize yield were examined. Higher biomass production was generally found at lower cutting height. Acacia angustissima had the highest biomass production, whereas M. scabrella was sensitive to repeated harvests. Crude protein (CP) was not affected by cutting height, but neutral detergent fibre (NDF), acid detergent fibre (ADF) and total polyphenols were higher at grater (1.0 m) cutting height. The highest CP was found in A. angustissima and the highest NDF and ADF in M. scabrella. Mixing legume leaves with Chloris gayana grass improved feed CP content, dietary mineral content and digestibility.

Adding A. angustissima into C. gayana grass based feed increased the total nitrogen, organic carbon and base cation content in the manure produced. Manure application increased soil pH, soil nutrient content, soil organic carbon, soil cation exchange capacity and water-holding capacity at maize planting stations. Maize agronomic parameters and yield increased with manure micro-dosing method.

Thus A. angustissima and L. pallida appear to be robust species for use in agroforestry systems with similar biophysical conditions and cutting methods to those tested in this thesis, and can be recommended to improve low-quality forage. Manure micro-dosing is a promising practice for soil fertility replenishment in crop production by smallholder farmers with limited income and access to manure.

Authors/Creators:Mukangango, Marguerite
Title:Potential of Acacia angustissima, Leucaena pallida and Mimosa scabrella in agroforestry systems on a Rwandan Ferralsol
Series/Journal:Acta Universitatis Agriculturae Sueciae (1652-6880)
Year of publishing :2019
Number:2019:42
Number of Pages:79
Papers/manuscripts:
NumberReferences
UNSPECIFIED��
Place of Publication:Uppsala
Publisher:Department of Soil and Environment, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-402-0
ISBN for electronic version:978-91-7760-403-7
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Article category:Scientific peer reviewed
Full Text Status:Public
Agris subject categories.:F Plant production > F01 Crop husbandry
P Natural resources > P30 Soil science and management
P Natural resources > P35 Soil fertility
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
Keywords:ferralsol, biomass production, tree management, nutrive value, digestability, soil fertility, maize yield, cattle manure, fertilisers, micro-dosing
URN:NBN:urn:nbn:se:slu:epsilon-p-100182
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-100182
ID Code:16153
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:20 May 2019 08:34
Metadata Last Modified:20 May 2019 08:34

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