How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching
Aim Recycling of cocoa pod husks has potential to contribute to mineral nutrition of cocoa. Yet little is known of the nutrient content and nutrient release patterns from the husks. The potassium (K) rich husks are usually left in heaps in cocoa plantations in Africa. We aimed to understand and quan...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2021
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/113367 |
| _version_ | 1855538084271095808 |
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| author | Hougni, D.G. Schut, Antonius G.T. Woittiez, Lotte Suzanne Vanlauwe, Bernard Giller, Kenneth E. |
| author_browse | Giller, Kenneth E. Hougni, D.G. Schut, Antonius G.T. Vanlauwe, Bernard Woittiez, Lotte Suzanne |
| author_facet | Hougni, D.G. Schut, Antonius G.T. Woittiez, Lotte Suzanne Vanlauwe, Bernard Giller, Kenneth E. |
| author_sort | Hougni, D.G. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Aim
Recycling of cocoa pod husks has potential to contribute to mineral nutrition of cocoa. Yet little is known of the nutrient content and nutrient release patterns from the husks. The potassium (K) rich husks are usually left in heaps in cocoa plantations in Africa. We aimed to understand and quantify release patterns of K and other nutrients from husks under varying rainfall regimes and assessed the effects of partial decomposition and inundation on nutrient leaching rates.
Methods
We incubated chunks of cocoa pod husks to assess decomposition rates and we measured nutrient leaching rates from two sets of husk chunks: one set was placed in tubes that were submitted to simulated scheduled rainfall events while the second set was continuously inundated in beakers.
Results
Decomposition of husks followed a second-order exponential curve (k: 0.09 day−1; ageing constant: 0.43). Nutrient losses recorded within 25 days were larger and more variable for K (33%) than for other macronutrients released in this order: Mg > Ca ≈ P > N (less than 15%). Potassium leaching was mainly driven by rainfall frequency (P < 0.05) and reinforced by intense rainfall, especially at lower frequency. Under water-saturated conditions, 11% of K was leached out within 48 h from fresh husks compared with 92% from partially decayed husks.
Conclusion
Some initial decomposition of cocoa pod husks is required to expose K to intense leaching. As decomposition progresses, abundant K losses are to be expected under frequent and/or intense rainfall events. |
| format | Journal Article |
| id | CGSpace113367 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1133672025-11-11T10:45:04Z How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching Hougni, D.G. Schut, Antonius G.T. Woittiez, Lotte Suzanne Vanlauwe, Bernard Giller, Kenneth E. nutrient cycles potassium cocoa pod leaching farmers agricultural practices Aim Recycling of cocoa pod husks has potential to contribute to mineral nutrition of cocoa. Yet little is known of the nutrient content and nutrient release patterns from the husks. The potassium (K) rich husks are usually left in heaps in cocoa plantations in Africa. We aimed to understand and quantify release patterns of K and other nutrients from husks under varying rainfall regimes and assessed the effects of partial decomposition and inundation on nutrient leaching rates. Methods We incubated chunks of cocoa pod husks to assess decomposition rates and we measured nutrient leaching rates from two sets of husk chunks: one set was placed in tubes that were submitted to simulated scheduled rainfall events while the second set was continuously inundated in beakers. Results Decomposition of husks followed a second-order exponential curve (k: 0.09 day−1; ageing constant: 0.43). Nutrient losses recorded within 25 days were larger and more variable for K (33%) than for other macronutrients released in this order: Mg > Ca ≈ P > N (less than 15%). Potassium leaching was mainly driven by rainfall frequency (P < 0.05) and reinforced by intense rainfall, especially at lower frequency. Under water-saturated conditions, 11% of K was leached out within 48 h from fresh husks compared with 92% from partially decayed husks. Conclusion Some initial decomposition of cocoa pod husks is required to expose K to intense leaching. As decomposition progresses, abundant K losses are to be expected under frequent and/or intense rainfall events. 2021-06 2021-04-15T12:17:22Z 2021-04-15T12:17:22Z Journal Article https://hdl.handle.net/10568/113367 en Open Access application/pdf Springer Hougni, D.G., Schut, A.G.T., Woittiez, L.S., Vanlauwe, B. & Giller, K.E. (2021). How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching. Plant and Soil, 1-16. |
| spellingShingle | nutrient cycles potassium cocoa pod leaching farmers agricultural practices Hougni, D.G. Schut, Antonius G.T. Woittiez, Lotte Suzanne Vanlauwe, Bernard Giller, Kenneth E. How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching |
| title | How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching |
| title_full | How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching |
| title_fullStr | How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching |
| title_full_unstemmed | How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching |
| title_short | How nutrient rich are decaying cocoa pod husks? The kinetics of nutrient leaching |
| title_sort | how nutrient rich are decaying cocoa pod husks the kinetics of nutrient leaching |
| topic | nutrient cycles potassium cocoa pod leaching farmers agricultural practices |
| url | https://hdl.handle.net/10568/113367 |
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