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Browsing by Author "Gilchrist Ramelli, Elizabeth"

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    Asesoría y acompañamiento en el cultivo de teca en la finca La Guadalupana en Turbo, Antioquia
    (Corporación Universitaria Lasallista, 2015-04-09) Franco Díaz, David Santiago; Gilchrist Ramelli, Elizabeth
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    Biodisponibilidad de Trichoderma asperellumen el tiempo en suelo Andisol en condiciones de laboratorio y campo
    (Corporación Universitaria Lasallista, 2015-08-24) Vargas Hoyos, Harold Alexander; Gilchrist Ramelli, Elizabeth
    Introduction. Trichoderma asperellum strain T109 has shown great antagonism activity in vitro against phytopathogenic fungi. However, it is necessary the real understand of this strain into spatial organization in soil under in vitro and field conditions to know the population density. Objective. The aim of this study was to evaluate different inoculum concentrations and frequencies of application in Trichoderma asperellum T109 bioavailability. Materials and methods. Spore suspensions containing 1x106 and 1x108 conidia.mL-1, were evaluated under controlled laboratory and field conditions, with different application times. We used the technique of Petri plate count for determination of CFU.g-1 of soil. Results. The T109 bioavailability was affected by the frequency of application and highly significant (p<0.001) for the initial concentration of inoculum. The last sampling under in vitro conditions showed that the concentration of 1x106 conidia mL-1 was significantly different (p<0.001) when compared to 1x108 conidias. mL-1, yielding maximum value of CFU.g-1 of soil for every 4 days of application. For field conditions, we obtained significant differences (p<0.001) when the concentration of 1x108conidias mL-1 and application of 7 days were tested concomitantly. Conclusions. We can determine that the population density of T. asperellum T109 is important in the establishment of the fungus in the soil.
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    Evaluación ambiental de actividades agropecuarias de pequeños productores en el municipio de Angelópolis (Antioquia, Colombia)
    (Corporación Universitaria Lasallista, 2014-10-22) Álvarez Hincapié, Carlos Federico; Gilchrist Ramelli, Elizabeth; David Ruales, Carlos Arturo
    Introduction. The subregion of Southwestern Antioquia has an heterogeneous structure of production, with four major production areas: coffee, coal, livestock and diversified production. However, it has not recognized the environmental impact that can perform these activities in the locality. Objective. An environmental assessment carried on agricultural systems (agriculture and pisciculture) of Angelópolis Township. Materials and methods. It was conducted through field observation and interviews with small producers of avocado, sugarcane, coffee, citrus, plantain and trout. Results. Are evident environmental problems associated with production including possible contamination with sewage, the lack of reforestation (renewal of native vegetation cover) and the improper disposal of waste and packaging of chemicals. Additionally, is remarkable the little interaction with the environmental authority and the lack of association in some production systems, aspects that could benefit the conservation of resources such as biodiversity, soils and water.
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    Hortensias del Llano
    (Corporación Universitaria Lasallista, 2014) Diaz Casas, Juan Camilo; Gilchrist Ramelli, Elizabeth
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    Implementación del amarre liso en Finca Cibeles S.A para optimizar insumos
    (Corporación Universitaria Lasallista, 2013) Betancur Bustamante, Ana María; Gilchrist Ramelli, Elizabeth
    Cultural practices on any farm are very important especially in banana crop because of this depends their future production. One of the most important tasks that needs this crop is to tie up the plant, and this allows support the flowering plant to prevent it from falling by the wind or by the weight of the bunch. The crisis being experienced by the agricultural sector and especially the banana growers by the high production costs and the high raw material prices (nylon), motivated research on new techniques that could be implemented into the banana cultivation. Finca Cibeles S.A. seek to reduce production costs by adjusting the tie up system of the bunch, while raising awareness of the environmental and economic impact to the crop and for the company to implement the new way to tie.