Short-term response of the Ca cycle of a montane forest in Ecuador to low experimental CaCl2 additions

Wullaert, Hans and Bigalke, Moritz and Homeier, Jürgen and Cumbicus Torres, Nixon Leonardo and Valarezo, Carlos and Wilcke, Wolfgang (2013). Short-term response of the Ca cycle of a montane forest in Ecuador to low experimental CaCl2 additions. "Journal of Plant Nutrition And Soil Science", v. 176 (n. 6); pp. 892-903. ISSN 1436-8730. https://doi.org/10.1002/jpln.201300146.

Description

Title: Short-term response of the Ca cycle of a montane forest in Ecuador to low experimental CaCl2 additions
Author/s:
  • Wullaert, Hans
  • Bigalke, Moritz
  • Homeier, Jürgen
  • Cumbicus Torres, Nixon Leonardo
  • Valarezo, Carlos
  • Wilcke, Wolfgang
Item Type: Article
Título de Revista/Publicación: Journal of Plant Nutrition And Soil Science
Date: December 2013
Volume: 176
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (2MB) | Preview

Abstract

The tropical montane forests of the E Andean cordillera in Ecuador receive episodic Sahara- dust inputs particularly increasing Ca deposition. We added CaCl2 to isolate the effect of Ca deposition by Sahara dust to tropical montane forest from the simultaneously occurring pH effect. We examined components of the Ca cycle at four control plots and four plots with added Ca (2 × 5 kg ha?1 Ca annually as CaCl2) in a random arrangement. Between August 2007 and December 2009 (four applications of Ca), we determined Ca concentrations and fluxes in litter leachate, mineral soil solution (0.15 and 0.30 m depths), throughfall, and fine litterfall and Al con- centrations and speciation in soil solutions. After 1 y of Ca addition, we assessed fine-root bio- mass, leaf area, and tree growth. Only < 3% of the applied Ca leached below the acid organic layer (pH 3.5?4.8). The added CaCl2 did not change electrical conductivity in the root zone after 2 y. In the second year of fertilization, Ca retention in the canopy of the Ca treatment tended to decrease relative to the control. After 2 y, 21% of the applied Ca was recycled to soil with throughfall and litterfall. One year after the first Ca addition, fine-root biomass had decreased significantly. Decreasing fine-root biomass might be attributed to a direct or an indirect beneficial effect of Ca on the soil decomposer community. Because of almost complete association of Al with dissolved organic matter and high free Ca2+ : Al3+ activity ratios in solution of all plots, Al toxicity was unlikely. We conclude that the added Ca was retained in the system and had benefi- cial effects on some plants.

More information

Item ID: 38396
DC Identifier: http://oa.upm.es/38396/
OAI Identifier: oai:oa.upm.es:38396
DOI: 10.1002/jpln.201300146
Official URL: http://onlinelibrary.wiley.com/doi/10.1002/jpln.201300146/abstract
Deposited by: Memoria Investigacion
Deposited on: 02 Feb 2016 15:53
Last Modified: 02 Feb 2016 15:53
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM