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metadata.dc.type: masterThesis
Título : Delta O-18 signature and phosphate pools in selected soil groups
Autor : Ortiz Navarro, María Soledad
metadata.dc.contributor.advisor: Wulf, Amelug
Lehndorff, Eva
Palabras clave : ANDOSOLS;CHEMOZEMS;CONTENIDO DE FOSFORO;EQUILIBRIO DE ISOTÓPOS
Fecha de publicación : 27-ago-2015
Editorial : Alemania / Universidad de Bonn / 2015
Citación : Ortiz Navarro, María Soledad. (2015). Delta O-18 signature and phosphate pools in selected soil groups. (Trabajo de titulación de la Maestría en Ciencias Agricolas y Manejo de Recursos Naturales en Trópicos y Sub-Trópicos). Universidad de Bonn. Alemania. 56 p.
Descripción : Soil P-cycling is an issue that requires a great deal of attention regarding the importance of P in all living organisms. This study focused its attention in four selected soils: Ferralsols (China) and Andosols (Indonesia), which are used for paddy rice cultivation; Luvisols (Germany) covered by winter wheat cultivars and Chernozems (Russia) covered by natural steppe vegetation. The study hypothesizes that the soil-forming factors and anthropogenic influences determine the composition of phosphate pools and the δ18-O signature. The soil samples were taken from different depths and each one was processed according to Hedley et al. (1982) modified by Tiessen and Moir (1993) and to modified from Tamburini et al.(2010). Pi concentration was measured by the Molybdenum Blue method of Murphy & Riley (1962), PT content was determined using ICP-OES, and Po by the difference between P and Pi, while δ18OP was measured using TC/EA-IRMS. T
URI : http://repositorio.educacionsuperior.gob.ec/handle/28000/1995
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