Combined Effect of Organic and Inorganic Fertilizers on Soil Chemical and Biological Properties and Maize Yield in Rubona, Southern Rwanda
- A. MukuralindaAffiliated withWorld Agroforestry Centre (ICRAF) Email author
- , J.S. TenywaAffiliated withMakerere University
- , L.V. VerchotAffiliated withWorld Agroforestry Centre (ICRAF)
- , J. ObuaAffiliated withMakerere University
Effects of Calliandra calothyrsus Meissner, Tithonia diversifolia Hensley A.Gray and Tephrosia vogelii Hook.f green manure applied independently or combined with triple superphosphate (TSP) on soil chemical and biological properties that influence maize yield were evaluated on an Ultisol of Rubona, Rwanda. Treatments compared in randomised complete block design were the control, limestone at 2.5 t ha–1, TSP at 25 and 50 kg P ha–1, leaf of Calliandra, Tithonia and Tephrosia applied independently at 25 and 50 kg P ha–1 and each combined with TSP at equivalent rates of 25 and 50 kg P ha–1, respectively. Lime led to significant increases in soil pH followed by Tithonia combined with TSP at a rate of 50 kg P ha–1. All treatments significantly reduced exchangeable acidity and aluminium compared to the control. A combination of organic materials with TSP at a rate of 50 kg P ha–1 improved soil organic carbon, microbial biomass carbon (MBC) and phosphorus (MBP). Compared to TSP applied alone, only the combination of Tithonia with TSP increased labile inorganic P fractions by 1.6–52.2%. In the fourth season, application of Tithonia green manure combined with TSP at a rate of 50 kg P ha–1 resulted in higher maize yield (25% increase) than TSP and Tithonia (9% increase) applied alone. Plant quality residues, labile inorganic P fractions, soil organic carbon, MBC and MBP values were correlated with maize yield, confirming the crucial role of plant residues quality and the soil properties in improving maize yield.
KeywordsBiomass transfer Maize yield Soil chemical and biological properties
- Combined Effect of Organic and Inorganic Fertilizers on Soil Chemical and Biological Properties and Maize Yield in Rubona, Southern Rwanda
- Book Title
- Innovations as Key to the Green Revolution in Africa
- Book Subtitle
- Exploring the Scientific Facts
- pp 729-740
- Print ISBN
- Online ISBN
- Springer Netherlands
- Copyright Holder
- Springer Science+Business Media B.V.
- Additional Links
- Biomass transfer
- Maize yield
- Soil chemical and biological properties
- Industry Sectors
- eBook Packages
- Editor Affiliations
- ID1. , Soil Health Program, Alliance for a Green Revolution in Afric
- ID2. , African Network for Soil Biology and Fer, Tropical Soil Biology & Fertility Inst.
- ID3. , African network for Soil Biology and Fer, Tropical Soil Biology & Fertility Inst.
- ID4. , Socio-economics and Biometrics, Kenya Agricultural Research Institute
- ID5. , African Network for Soil Biology and Fer, Tropical Soil Biology and Fertility Inst
- Author Affiliations
- 1. World Agroforestry Centre (ICRAF), , Rwanda
- 2. Makerere University, Kampala, Uganda
- 3. World Agroforestry Centre (ICRAF), Nairobi, Kenya
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