Revista LASALLISTA de Investigación
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Browsing Revista LASALLISTA de Investigación by Subject "Abono orgánico"
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Item Evaluación comparativa de los parámetros productivos y agronómicos del pasto kikuyo Pennisetum clandestinum bajo dos metodologías de fertilización(Corporación Universitaria Lasallista, 2010) Echeverri Zuluaga, José Julián; Restrepo Betancur, Luis Fernando; Parra Suescún, Jaime EduardoIntroduction. Green forage production and its quality are some of the factors that determine the efficiency in the production and composition levels of milk in Antioquian intensive systems. Most common grass species is Kikuyo pennisetum Clandestinum, which can be found in 85% of specialized systems. This grass requires high chemical fertilization levels to achieve biomass productions enough to maintain the high loads they are submitted to by producers. Nitrogen fertilization, recommended for this kind of exploitations, moves between 50 and 70 Kg of nitrogen per hectare/grazing, and this means at least 400 Kg of nitrogen per year. The cost of fertilizers has obligated producers to look for strategies to reduce costs, using, among other options, organic matter as their compost source. Organic matter is important because of its impact on the soil’s structure and on some physical-chemical characteristics that help to a better use of the chemical fertilizer and finally increase the quality and the production of green forage. Objective. To determine the effect of the partial substitution of chemical fertilizers on the production of green forage and the leaf-stem relation in a farm located at the North of Antioquia. Materials and Methods. An experimental design in blocks randomized with three treatments was used, using as blocks 17 land plots in which the research was made. A minimum of three repetitions was made in every plot. The treatments were: 1) 50Kg of N/ha; 2) 25 Kg of N/ha plus 200Kg of organic fertilizar and 3) 25 Kg of N/ha plus 300Kg of organic fertilizer. Results. The statistic analysis was made by the use of the SAS GLM 9.0 version procedure. Conclusion. According to the analysis, there was no significant difference (p<0.05) between treatments for any of the evaluated characteristics, forage production per hectare and leaf:stem relation. This means that, under production and agronomic quality terms of the forage, the organic fertilizer replaced the chemical one, becoming a feasible alternative for fertilization in this kind of exploitations.Item Los residuos sólidos municipales como acondicionadores de suelos(Corporación Universitaria Lasallista, 2004) Puerta Echeverri, Silvia MaríaThe compostation made from organic remains produced by municipals, can be a liability and cause damage when used as soil conditioners, because of the excess of inert materials, stinking emissions, high salinity levels, toxicity due to organic contaminants or heavy metals, immaturity of the process and the presence of pathogenic organisms. Given all this factors, it is necessary to evaluate all of the physical, chemical and microbiological parameters of the process, keeping in mind the corresponding Colombian laws on the subject, which regulates the organic materials used as fertilizers and soil conditioners in Colombia: Colombian Technical norm 5167 and the resolution 00150 of January 21st of 2003, made by the Colombian Agro-Cultural Institute, ICA.Item Manejo y procesamiento de la gallinaza(2005) Estrada Pareja, Mónica MaríaIntensive poultry systems produce a big quantity of organic waste, like that from hens. When hen waste is used fresh, it causes environmental damage. Its handling and processing are not only alternatives to diminish the environmental damage mentioned above, but a way to make hen waste a really profitable product for poultry industrials.