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      Variaciones en algunas propiedades del suelo por el cambio de uso de la tierra, en las partes media y baja de la microcuenca Membrillo, Manabí, Ecuador Translated title: Variations in some soil properties because of the land use change in the middle and low parts of the Membrillo micro-watershed, Manabi, Ecuador

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          Abstract

          El cambio de uso de la tierra, sobre todo el de tierras forestales a tierras cultivadas, es una de las prácticas que mayor impacto ha tenido en la degradación de los suelos en el Mundo y que ha provocado en gran parte la emisión de CO² a la atmósfera. Por esto se hace necesario evaluar las transformaciones que ocurren en las propiedades edafológicas, por el cambio de uso de los suelos, en los diferentes ecosistemas para de esta forma tomar las medidas adecuadas para su mejoramiento y conservación. En este trabajo, se estudian las variaciones de algunas propiedades de los suelos de las partes medias y bajas de la microcuenca Membrillo (provincia Manabí, Ecuador). Esta microcuenca presenta un relieve alomado, premontañoso, en la cual predominan bosques primarios y secundarios y plantaciones de cacao, pastizales y cultivos como el maíz en su parte baja. Los suelos son Feozems, Cambisoles y Fluvisoles y se presentan los resultados sobre cambios en sus características morfológicas (color, tipo de estructura, espesor de los horizontes A y B), las pérdidas de carbono orgánico y en la densidad aparente del suelo, provocado por el cambio de uso de la tierra

          Translated abstract

          The land use change, principally the change from forest lands to cultivated ones, is one of the practices that have the highest impact in soil degradation in the World and, besides, provoke a great deal of CO² emission to the atmosphere. So that is necessary to evaluate theses changes that occur in soils properties in different ecosystems, to take the appropriate conservation measures and improve soil management. In this paper, for a first time, the change of some soil properties due to land use change is studied, from the lowest and middle part of Membrillo micro-watershed in Manabí province, Ecuador. This micro-watershed has a hilly to premountian relief where primary and secondary forests, cocoa plantations and lands under maize cultivation are predominant, in the lowest part. The soils are Phaeozems, Cambisols and Fluvisols. In this paper we present the results obtained related to changes on soil morphological characteristics (color, structure and the A y B horizon thickness), organic carbon lost and the change on volume density, provoked by land use change

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          Most cited references28

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          AN EXAMINATION OF THE DEGTJAREFF METHOD FOR DETERMINING SOIL ORGANIC MATTER, AND A PROPOSED MODIFICATION OF THE CHROMIC ACID TITRATION METHOD

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            Persistence of soil organic matter as an ecosystem property.

            Globally, soil organic matter (SOM) contains more than three times as much carbon as either the atmosphere or terrestrial vegetation. Yet it remains largely unknown why some SOM persists for millennia whereas other SOM decomposes readily--and this limits our ability to predict how soils will respond to climate change. Recent analytical and experimental advances have demonstrated that molecular structure alone does not control SOM stability: in fact, environmental and biological controls predominate. Here we propose ways to include this understanding in a new generation of experiments and soil carbon models, thereby improving predictions of the SOM response to global warming.
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              The knowns, known unknowns and unknowns of sequestration of soil organic carbon

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                Author and article information

                Journal
                ctr
                Cultivos Tropicales
                cultrop
                Ediciones INCA (La Habana, , Cuba )
                0258-5936
                1819-4087
                March 2017
                : 38
                : 1
                : 50-56
                Affiliations
                [03] Manabí orgnameEspecialista del proyecto Gestión Integral para el Manejo Sostenible de la Microcuenca Membrillo de la provincia de Manabí Ecuador
                [05] orgnameMinisterio de Educación Superior (MES) Cuba orgdiv1Universidad de Matanzas Camilo Cienfuegos. Cuba
                [01] Mayabeque orgnameInstituto Nacional de Ciencias Agrícolas (INCA) Cuba
                [02] Manabí orgnameEscuela Superior Politécnica Agropecuaria de Manabí. (ESPAM MFL) Ecuador
                [04] orgnameUniversidad Laica Eloy Alfaro de Manabí
                Article
                S0258-59362017000100006 S0258-5936(17)03800100006
                f2c6bf43-f4cc-43ae-a60d-dbff3c74989b

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 09 September 2015
                : 01 June 2016
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 7
                Product

                SciELO Cuba


                carbono orgánico,soil degradation,organic carbon,degradación del suelo

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