Retention and availability of phosphorus associated with organic matter in a typic melanudands of cauca department, colombia
The effect of organic matter on retention and Phosphorus (P) availability in a Typic Melanudands cultivated coffee (Coffea arabica) and guamo (Inga spuria), was evaluated by isotherms from the Langmuir equation using linearized by Scatchard and using the method proposed by Fox and Kamprath. A comple...
- Autores:
-
Menjivar Flores, Juan Carlos
Bravo Realpe, Isabel
Montoya, Juan Carlos
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2013
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/44541
- Acceso en línea:
- https://repositorio.unal.edu.co/handle/unal/44541
http://bdigital.unal.edu.co/34640/
- Palabra clave:
- 6 Tecnología (ciencias aplicadas) / Technology
63 Agricultura y tecnologías relacionadas / Agriculture
adsorption
Andisol
organic matter
phosphorus
Ciencias
Agropecuarias
adsorción
Andisol
fósforo
inmovilización
materia orgánica
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
| Summary: | The effect of organic matter on retention and Phosphorus (P) availability in a Typic Melanudands cultivated coffee (Coffea arabica) and guamo (Inga spuria), was evaluated by isotherms from the Langmuir equation using linearized by Scatchard and using the method proposed by Fox and Kamprath. A completely randomized design with sixty treatments, generated from five concentrations of P for six times of incubation, in soil samples with and without organic matter was used. The analysis of variance no show differences in adsorption of P as a function of time of incubation, indicating that the adsorption occurs from time zero. P retention was adjusted according to the Scatchard isotherm with values L =0.16 x 106(soil with organic matter) and 3 x 106(soil without organic matter), showing that phosphorus adsorption occurs mainly in the mineral fraction. Higher distribution coefficient on soil without organicmatter (9.72) shows many adsorption sites with respect to soil with organic matter (4.08). The upper value of Qmax on soil with organic matter reveals adsorption sites but with low affinity, reflected in lower partition coefficient, showing easy desorption process to the soil solution. |
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