Precipitation effects on soil characteristics in tropical rain forests of the Chocó biogeographical region
| Autor: | Flavio Moreno-Hurtado, Harley Quinto-Mosquera |
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| Předmět: |
Horticulture
lcsh:Agriculture Nutrient lixiviation Cation-exchange capacity Ultisol Organic matter lcsh:Agriculture (General) chemistry.chemical_classification nutrient limitation Ecology lcsh:S 57 Ciencias de la vida Biología / Life sciences biology Tropics Forestry Edaphic 58 Plantas / Plants lcsh:S1-972 Geography Agronomy chemistry Soil water Animal Science and Zoology Terrestrial ecosystem tropical rainforest Agronomy and Crop Science Food Science |
| Zdroj: | Redalyc Revista Facultad Nacional de Agronomía Medellín, Vol 69, Iss 1, Pp 7813-7823 (2016) Repositorio UN Universidad Nacional de Colombia instacron:Universidad Nacional de Colombia |
| Popis: | Average annual precipitation (AAP) is one of the principal environmental factors that regulates processes in terrestrial ecosystems. The effect of AAP on the availability of edaphic nutrients is poorly understood, especially in tropical zones with high rainfall. In order to evaluate the effects of high AAP on the availability of soil N, P, and K, physicochemical parameters were measured in soils of three tropical rainforests in the Chocó biogeographical region with different AAPs (7,500, 8,000, and 10,000 mm yr-1). Furthermore, a bibliographical review was carried out that including studies for distinct tropical Ultisols and AAP ranging from 1,800 to 10,000 mm yr-1. The evaluated soils presented extreme acidity with high contents of Al, organic matter (OM) and total N, and low quantities of P, Mg, and Ca. The K concentrations were intermediate and the effective cation exchange capacity (ECEC) was low. On the other hand, in the evaluation of the influence of the AAP on the availability of N, P, and K in the soil, contrasting tendencies were observed. On one side, a positive curvilinear relationship was found between the availability of N and the increase in the AAP. On the other side, the available P content significantly decreased with increasing AAP. In conclusion, the excessive AAP resulted in increases in total N and low availability of P, thereby altering the dynamics of the nutrients and the carbon balance of the tropical forest |
| Databáze: | OpenAIRE |
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