Organic resources and earthworms affect phosphorus availability to sorghum after phosphate rock addition in semi-arid West Africa
| Autor: | Elisée Ouédraogo, A. Mando, Lijbert Brussaard, Leo Stroosnijder |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Soil biology
termites Soil Science chemistry.chemical_element soil biodiversity Leerstoelgroep Land degradatie en ontwikkeling engineering.material Microbiology humid tropics Bodembiologie Cambisol decomposition biology Compost crusted soil mulch Phosphorus Earthworm Soil Biology Straw biology.organism_classification Sorghum PE&RC Phosphorite chemistry Agronomy quality engineering Environmental science Land Degradation and Development agricultural intensification Agronomy and Crop Science agroecosystem function |
| Zdroj: | Biology and Fertility of Soils, 41(6), 458-465 Biology and Fertility of Soils 41 (2005) 6 |
| ISSN: | 0178-2762 |
| DOI: | 10.1007/s00374-005-0840-0 |
| Popis: | A field experiment was laid out in Burkina Faso (West Africa) on an Eutric Cambisol to investigate the interaction of organic resource quality and phosphate rock on crop yield and to assess the contribution of earthworms (Millsonia inermis Michaelsen) to P availability after phosphate rock application. Organic resources of different quality were applied at a dose equivalent to 40 kg N ha−1 with or without phosphate rock from Kodjari (Burkina Faso) at a dose equivalent to 25 kg P ha−1, and were compared with control and single phosphate rock treatments in a factorial complete block design with four replicates. Sorghum (Sorghum bicolor L. Moench) variety SARIASSO 14 was grown. Sheep dung had the highest impact on earthworm casting intensity followed by maize straw. Combining organic resources with phosphate rock reduced earthworm casting activities compared to a single application of organic resources or phosphate rock. Addition of phosphate rock to maize straw reduced P availability in earthworm casts whereas combining sheep dung or compost with phosphate rock increased P availability. The contribution of earthworms to Kodjari phosphate rock solubilisation mainly occurred through their casts, as the available P content of casts was 4 times higher than that of the surrounding soil. |
| Databáze: | OpenAIRE |
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