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Rosa Mary Hernández

Rosa Mary Hernández
IDECYT-Universidad Simón Rodríguez · Centro de Agroecología Tropical CEDAT

PhD
Researcher. Agroecological management, soil biology and ecology. Scienticific adviser in agroecology; writer and editor

About

84
Publications
33,256
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Introduction
Soil Biology and ecology. Agroecological management and soil-based ecosystem services: bioaggregation, organic matter fractions and local biological resources. Selection, determination, and standardization of indicators of sustainability and soil health. Development of learning skills for the facilitation of agroecology and soil management as a living system. Participatory action research projects with agricultural communities for the adoption of agroecological production systems.

Publications

Publications (84)
Article
Full-text available
The application of different sources of nutrients to the soil with varying degrees of solubility, as well as the use of organic and inorganic fertilizers, can generate different responses in agroecosystems. The objective of this study was to evaluate the effect of different fertilization options on the quality of forage in the conservation-based ag...
Article
Full-text available
Citation: Morales-Márquez, J.A.; Jiménez-Ballesta, R.; Hernández-Hernández, R.M.; Sánchez, G.K.; Lozano, Z.; Castro, I.
Article
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Conventional agricultural in the Venezuelan Llanos has generated gradual soil degradation. Therefore, conservationist agriculture has been proposed. According to several works, this type of management favors soil macrofauna. To test this hypothesis, the response of soil macrofauna to the establishment of conservationist maize crops, associated with...
Technical Report
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El siguiente material, muestra el compostaje realizado en diferentes espacios de aprendizaje, como una estrategia para emular el proceso natural de descomposición de la materia orgánica. Para alcanzar un aprendizaje significativo, los docentes tienen que emplear una serie de acciones, estrategias y metodologías innovadoras, que sean pertinentes, co...
Article
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Banana is a staple food and a major export commodity in the tropics. However, banana production systems are affected by the plant-soil relationships, where properties such as quality and quantity of soil organic matter play an important role in the dynamics of soil physical properties. In order to evaluate the effect of the soil organic carbon (SOC...
Article
Full-text available
Mineral deficiencies in soil-plant-animal relations are linked to chemical properties and reproductive problems in grazing animals. The objective of this study was to determine the dynamics of K, Ca, and Mg in the green leaf biomass of two types of introduced forages, Brachiaria dyctioneura (Bd) and Centrosema macrocarpum (Cm), compared to the natu...
Chapter
En reiteradas ocasiones nos vemos en la necesidad de evaluar si un sistema agroecológico va encaminado por la vía de la sostenibilidad productiva y ambiental. Un monitoreo desde una visión integral y ecosistémica, a partir de las propiedades emergentes del suelo como biosistema, recoge indicadores biológicos del suelo como herramientas claves que a...
Article
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The cereal-cattle conservation-based agroecosystems in neotropical savannas are based on the introduction of a forage of better quality than that of the native pasture. This forage acts as a soil protective coverage under non-tillage managements and like green manure to the maize culture. In order to evaluate how the consumption by bovine, digestib...
Article
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Multiple ecosystem functions need to be considered simultaneously to manage and protect the many ecosystem services that are essential to people and their environments. Despite this, cost effective, tangible, relatively simple, and globally‐relevant methodologies to monitor in situ soil multifunctionality, i.e. the provision of multiple ecosystem f...
Conference Paper
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El secuestro potencial del carbono (C) en los suelos está relacionado a su capacidad de almacenar C por largos periodos de tiempo. Los Llanos Venezolanos, por su amplia extensión, pudiesen tener un gran impacto en el secuestro de C en el suelo, a pesar de sus bajos contenidos. Nuestro objetivo fue evaluar el secuestro del C en suelos de diferentes...
Article
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In the well-drained savannahs of Venezuelan Llanos, intensive agricultural activities could be causing damage to the soil, with negative consequences for the ecosystem. In order to avoid this problem, some agroecological alternatives are needed. Consequently, it is necessary to know the biologic dimension in this ecosystem, and within this, the soi...
Article
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1. Dryland vegetation is characterized by discrete plant patches that accumulate and capture soil resources under their canopies. These "fertile islands" are major drivers of dryland ecosystem structure and functioning, yet we lack an integrated understanding of the factors controlling their magnitude and variability at the global scale. 2. We cond...
Article
RESUMEN Cada vez es más importante la incorporación del conocimiento relevante, en base a la praxis y las vivencias de las comunidades agrícolas, para construir espacios de aprendizaje que atiendan, desde la investigación participativa, problemas y soluciones en los procesos de conversión agroecológica para la producción de alimento. La educación a...
Article
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Climate and human impacts are changing the nitrogen (N) inputs and losses in terrestrial ecosystems. However, it is largely unknown how these two major drivers of global change will simultaneously influence the N cycle in drylands, the largest terrestrial biome on the planet. We conducted a global observational study to evaluate how aridity and hum...
Research
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Procceding of Agroenviron 2004. Rule of multipurpose agriculture in sustainig global environment
Research
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Comunicaciones del VI Congreso de la Sociedad Española de Agricultura Ecológica (SEAE). SEAE (Eds.). 2004
Data
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Plant-plant interactions are driven by environmental conditions, evolutionary relationships (ER) and the functional traits of the plants involved. However, studies addressing the relative importance of these drivers are rare, but crucial to improve our predictions of the effects of plant-plant interactions on plant communities and of how they respo...
Article
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La investigación se realizó en la Colonia Tovar, estado Aragua, Venezuela, en parcelas de pequeños productores, a una altura aproximada de 1.700 m.s.n.m, caracterizada por un mesoclima superhúmedo muy frío. El muestreo se hizo en los primeros 20 cm de profundidad en tres suelos de textura franca con uso de bosque nublado y cultivos de fresa y de du...
Article
Full-text available
Plant-plant interactions are driven by environmental conditions, evolutionary relationships (ER) and the functional traits of the plants involved. However, studies addressing the relative importance of these drivers are rare, but crucial to improve our predictions of the effects of plant-plant interactions on plant communities and of how they respo...
Article
Full-text available
The biogeochemical cycles of carbon (C), nitrogen (N) and phosphorus (P) are interlinked by primary production, respiration and decomposition in terrestrial ecosystems1. It has been suggested that the C, N and P cycles could become uncoupled under rapid climate change because of the different degrees of control exerted on the supply of these elemen...
Article
The biogeochemical cycles of carbon (C), nitrogen (N) and phosphorus (P) are interlinked by primary production, respiration and decomposition in terrestrial ecosystems. It has been suggested that the C, N and P cycles could become uncoupled under rapid climate change because of the different degrees of control exerted on the supply of these element...
Article
Full-text available
An increment of the human activity in the tropical countries has led to accelerate land use changes with consequences on the carbon (C) biogeochemical cycle. The loss of biodiversity and the highest rates, at which the biological processes of their soils occur, affect the decomposition and the humification of the organic matter. This later affects...
Article
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The evaluation of the effect that applying organic fertilizer and salt solutions had on the biological attributes of two soils of Quibor, in the state of Lara, Venezuela, one under conventional management (CM) and another under conservation management (CS), was done using a greenhouse trial. Three doses of organic matter (OM) were used: 0, 15 and 3...
Article
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Micronutrientes en agregados de un suelo de sabana, bajo un sistema maíz-ganado mejorado a Micronutrients in aggregates of a savanna soil, under an improved maize-livestock production system RESUMEN El uso y manejo de los suelos influencian el conte-nido de micronutrientes y su distribución en el per-fil. Con el propósito de evaluar los efectos de...
Article
Full-text available
Con el objetivo de evaluar el efecto cambio de uso del suelo sobre su fertilidad integral, se toma-ron muestras de suelo y tejido en una zona ubica-da en el sector Cucurucho, municipio Tovar (Aragua), bajo dos tipos de utilización: condicio-nes naturales (NA) y bajo intervención con duraz-nero (IN). El muestreo se realizó en un diseño completamente...
Article
Full-text available
In order to evaluate the effect of cover crops (grass or legume) and the fertilization type on phosphorus availability in a system no-tillage corn - cattle, a field experiment was conducted on a Typic Plinthustults soil in well drained savannas of Vernezuela. The design was a completely random factorial arrangement 2×4 (cover crop × fertilization),...
Presentation
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En el contexto del uso y manejo sostenible del recurso suelo, las Líneas de Investigación, que adelantan los centros de investigación y universidades de Venezuela, expresan un importante esfuerzo por armonizarse con la generación de conocimientos y tecnologías asociadas al conocimiento y la estructura productiva nacional, que permita la construcció...
Conference Paper
Full-text available
En el contexto del uso y manejo sostenible del recurso suelo, las Líneas de Investigación, que adelantan los centros de investigación y universidades, expresan un importante esfuerzo por armonizarse con la generación de conocimientos y tecnologías asociadas a la estructura productiva nacional, que permita la construcción de las condiciones necesari...
Article
Full-text available
In order to evaluate the effect oj cover crops (grass or legume) and the fertilization type on phosphorus availability in a system notillage corncattle, a field experiment was conducted on a Typic Plinthustults soil in well drained savannas of Vernezuela. The design was a completely random factorial arrangement 2*4 (cover crop x fertilization), wit...
Article
Full-text available
Experiments suggest that biodiversity enhances the ability of ecosystems to maintain multiple functions, such as carbon storage, productivity, and the buildup of nutrient pools (multifunctionality). However, the relationship between biodiversity and multifunctionality has never been assessed globally in natural ecosystems. We report here on a globa...
Article
The effect of cover type (grass or legume) and phosphorus fertilization on soil physical properties and maize root distribution in a cereal-livestock system, on a soil Typic Plinthustults (Guárico state, Venezuela) was evaluated. The experimental design was a split plot in strips with three replications. Two cover: Urochloa dictyoneura (UD), and Ce...
Article
The use and management of soils affect the micronutrient content and its distribution in the profile. This study evaluates the effect of different types of soil coverage on the content and distribution of micronutrients in macroaggregates and microaggregates, in a corn-livestock system on a sandy, in La Iguana Experimental Station (Santa Maria de I...
Conference Paper
Full-text available
La labranza conservacionista cumple un papel multifuncional en los agroecosistemas, en tanto que su adopción implica cambios favorables simultáneos en varios componentes y procesos agroecológicos. El objetivo de este trabajo fue evaluar la influencia de la siembra directa con distintas coberturas sobre la dinámica de las propiedades físicas del sue...
Conference Paper
sabanas de los Llanos Venezolanos. Este estudio plantea que el uso de la siembra directa del maíz asociado a coberturas perennes, bajo fuentes de fósforo (P) de lenta liberación, puede mejorar la distribución del N en los subsistemas suelo y vegetación, afectando positivamente el N del cultivo. En un diseño completamente aleatorizado con tres parce...
Article
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This research was conducted on soils of small farmers in the Colonia Tovar - Venezuela, with an approximate height of 2000 m over the sea level, characterized by its template mountain weather. The sampling was done in the first 20 cm depth along 50 m transects, in three locations with different uses: forest, growing crops of strawberry and peach. A...
Article
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Food security is a great problem in tropical countries and it depends ever more on the implementation of sustainable agriculture practices. Thus, the local and technical knowledge integration is necessary, with the goal of reaching a shared vision of reality, and synergy, at the time of decision making. This transdisciplinary vision of agro-ecologi...
Article
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Efectos del uso de fertilización y cultivos de cobertura sobre el nitrógeno y la materia orgánica en un suelo de sabana, Venezuela a Effect of fertilization and cover crops on soil nitrogen and organic matter in a savanna soil, Venezuela RESUMEN Se realizó un experimento, en suelos de bajo pH de las sabanas del estado Guárico, Venezuela, con el obj...
Article
Full-text available
Cultivos de cobertura y fertilización fosfórica y su efecto sobre algunas propiedades químicas del suelo en un sistema mixto maíz-ganado a Cover crops and phosphate fertilization effect on soil chemical properties in maize – cattle system RESUMEN Con el objetivo de evaluar el efecto del tipo de cobertura y de fertilización fosfórica en un siste-ma...
Article
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Resumen La utilización de diferentes fracciones de la materia orgánica del suelo (MOS), pueden ser utilizados como indicadores de la sostenibilidad de sistemas agrícolas. Con la finalidad de evaluar la cantidad, composición y distribución en el perfil de diferentes fracciones de la MOS de un suelo bajo sistemas de agricultura conservacionista, se r...
Article
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Some researchers suggest the use of different SOM organic matter (SOM) fractions or compartiments like indicators of the agricultural systems sustainability. In order to evaluate the amount, composition and distribution in the profile of different SOM fractions from the soil on conservation agriculture systems, evaluations in an Ustoxic Quartzipsam...
Article
Organic matter (OM) is one of the most accepted parameters as indicator of changes in soil quality; however, its dynamic fractions can be even more sensitive to the effects of soil management and vegetation type. Determination of early changes due to soil management can be important in tropical soils, because the biological processes of the modifie...
Article
Full-text available
The Venezuelan Trachypogon savannas are mainly used for extensive cattle rising, but the biomass production is generally limited by soil fertility. In order to evaluate the change in the soil chemical properties by the introduction of pastures, evaluations were made in a Typic Plinthustults located in the savannahs of Guárico State. The cover crops...
Article
Full-text available
A great extension (615,000 ha) of native savannas of the eastern plains of Venezuela have been replaced by plantations of Pinus caribaea var. hondurensis; however, only scarce information exists about the impact of this land use on carbon dynamics in soils. We studied the effect of temporal variability and the substitution on the total organic carb...
Article
Full-text available
Substitution of native savanna by Pinus caribaea (Pinaceae) plantations in Venezuela: effect on parameters that indicated changes in soil carbon content. A great extension (615 000 ha) of native savannas of the eastern plains of Venezuela have been replaced by plantations of Pinus caribaea var. hondurensis; however, only scarce information exists a...
Article
Full-text available
Maintaining soil quality is critical for environmental sustainability, an especially important aspect for tropical hillside soils. Several fractions of soil organic matter (OM) have been recognized as good indicators of soil quality and resilience. Therefore, organic carbon, light and heavy soil fractions, microbial biomass, basal respiration, humi...
Article
Full-text available
Maintaining soil quality is critical for environmental sustainability, an especially important aspect for tropical hillside soils. Several fractions of soil organic matter (OM) have been recognized as good indicators of soil quality and resilience. Therefore, organic carbon, light and heavy soil fractions, microbial biomass, basal respiration, humi...
Article
South American savannahs cover a surface of 269×10 6ha in Brazil, Colombia, Venezuela, Guyana and Bolivia. In a world scale savannahs are one of the most important land extensions with agricultural potential for crop and forestry production. These territories also constitute the main alternative to agricultural expansion into ecologically fragile t...
Article
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Las sabanas de Sudamérica con una superficie de 269×106ha extendidas en Brasil, Colombia, Venezuela, Guyana y Bolivia representan una de las mayores extensiones de tierra con potencial para la producción agrícola, constituyéndose en la principal alternativa para evitar la expansión agrícola hacia áreas de mayor fragilidad ecológica. Hasta hace unos...