Title: | Determinación de anomalías causadas a las propiedades físicas, químicas e hidrofísicas, en los suelos de páramo en el sur del Ecuador, ocasionadas por alteraciones antrópicas |
Other Titles: | Anales de la Universidad de Cuenca |
Authors: | Ramírez Matamoros, Marco Tulio Cisneros Espinoza, Pedro José |
Keywords: | Densidad Aparente Humedad Materia Organica Saturacion De Bases |
Issue Date: | Dec-2015 |
metadata.dc.ucuenca.paginacion: | Páginas 123-137 |
metadata.dc.description.numberSequence: | número 58 |
Publisher: | Universidad de Cuenca |
metadata.dc.description.city: | Cuenca |
Series/Report no.: | 050;si10635 |
metadata.dc.type: | Article |
Abstract: | There is 48% increase of DA in Andosols, that are subjected to intense agricultural activity (Buerán) and
greenhouse (Quimsacocha). In intensive farming with improved pastures (27%). And in soils plowed by
tractor (Cancan) there exist an increase of 8% in one year. The Ks is greater in disturbed sites (10-83%).
Moisture saturation (pF0) exceeds 80% in unchanged Andosols, with exception of Cancan (67%), what
could be explained by high DA (0.86 g cm-3), plowed fields in Cancan show the lowest values of 65%, in the
other altered sites it´s <80%. Agricultural activity in Buerán causes a reduction of: 13% volumetric content
at pF0, 22% at pF 2.7 and 37% at pF 4.2. With exception of altered soils: Cancan and Cajas increase 19%
at pF 4.2. The reduction of the total water content, among the witnesses vs disturbed sites, show significant
differences (p = 0.0004) with 29%. The parameters hydro physical ACP, the first component consists of DA,
negatively correlated with MO and pF-2.7, this component explains 77% of the variance. The MO has a high
correlation with DA (R =- 0.71), P=0.003. The MO reduced 31% in one year, after plowing with tractor in
cancan. SB increases 50% at sites where they apply fertilizers or amendments. The content of Ca is higher
(50-87%). ACP for chemical variables, the component 1 explains 52% of variance and consists of: SB, Ca,
negatively correlated with C, N and CIC. The second component explains 23%, corresponds to the pH, negatively
correlated with Al+H. |
Description: | Existe un incremento de 48% en la densidad aparente, en Andosoles sometidos a intensa actividad
agropecuaria (Buerán), e invernadero (Quimsacocha). En la ganadería intensiva con pastos mejorados
(27%) y suelo arado con tractor (Cancán) 8% en un año. La Ks es mayor en sitios alterados (10-83%).
La humedad de saturación (pF0), supera el 80%, en Andosoles inalterados, excepto Cancán (67%), que
se explicaría por alta DA (0.86 g cm-3), el arado en Cancán presenta los valores más bajos 65%, en los
restantes alterados es < 80%. La actividad agropecuaria en Buerán causa una reducción de: 13% del
contenido volumétrico a pF0, 22% a pF 2.7 y 37% a pF 4.2. Excepto los alterados: Cancán y Cajas aumenta
19% a pF 4.2. La reducción del contenido total del agua, entre los sitios testigos vs alterados, muestran
diferencias significativas (p=0.0004) con 29%. |
URI: | http://dspace.ucuenca.edu.ec/handle/123456789/23356 |
ISSN: | 1390-9657 |
Appears in Collections: | 2015
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