SciELO - Scientific Electronic Library Online

 
vol.40 issue3The footprint of land use on the Macaronesian laurel forest landscape: an underestimated driving factor in protected areasMorpho-physiological acclimation to canopy coverage of Araucaria angustifolia during the establishment in the Atlantic Forest, Argentina author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


Bosque (Valdivia)

On-line version ISSN 0717-9200

Abstract

QUINTO MOSQUERA, Harley; CORDOBA MORENO, Lehner  and  MINOTTA MORENO, Mónica. Effects of soil fertilization on litter production in tropical rainforests of biogeographic Chocó, Colombia. Bosque (Valdivia) [online]. 2019, vol.40, n.3, pp.315-322. ISSN 0717-9200.  http://dx.doi.org/10.4067/S0717-92002019000300315.

It has been hypothesized that the net primary productivity of low-altitude tropical rainforests is limited by the concentration of soil nutrients, mainly by edaphic phosphorus. To test this hypothesis, litter production was evaluated as a measure of net primary productivity in two tropical rain forests located in the towns of Opogodó and Pacurita in the biogeographic Chocó. One hundred and twenty-five leaf litter collectors were installed, which were monitored monthly for one year. These collectors were distributed in five fertilization treatments (control, nitrogen, phosphorus, potassium and NPK) to determine the effects of the addition of nutrients on the production of total litter and its components (leaves, branches, reproductive and miscellaneous material (material in decomposition)), and the reproduction / leaf ratio. In Opogodó, the application of nitrogen or phosphorus increased total litter production, nitrogen fertilization increased the production of branches, and the addition of nitrogen, phosphorus or potassium, separately, increased the production of miscellaneous material. Whereas, with fertilization, the production of reproductive material and the relation reproductive/leaves were reduced. In synthesis, fertilization changed the relative contribution of the different litter components, and favored the construction of photosynthetic structures (leaves), compared to reproductive structures. In addition, it was shown that the fall of litter is limited by nitrogen, phosphorus and potassium, which influence the carbon capture of these forest ecosystems. In Pacurita, fertilization had no significant effects on litter production.

Keywords : phosphorus; nutritional limitation; nitrogen; potassium; net primary productivity.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )