Evaluación de la viabilidad microbiana e identificación del plaguicida de mayor uso empleado en cultivos de yuca en el municipio de Granada Meta mediante lechos biológicos.
Fecha
2019-05-30Registro en:
Quevedo, A. & Novoa, M(2019). Evaluación de la viabilidad microbiana e identificación del plaguicida de mayor uso empleado en cultivos de yuca del municipio de Granada Meta mediante lechos biológicos. Trabajo de grado. Universidad Santo Tomas. Villavicencio
reponame:Repositorio Institucional Universidad Santo Tomás
instname:Universidad Santo Tomás
Autor
Quevedo Mayorga, Angie Zulema
Novoa Baquero, Mayra Jinneth
Institución
Resumen
The use of chemical pesticides and the inadequate procedures in the sites of preparation of mixtures in the areas of cultivation, generate risks for the human health, the environment and the agriculture, therefore, this investigation determined the pesticide of greater use in the cultures of yucca (Manihot esculenta Crantz) of the municipality of Granada Meta, since in the last years the department of Meta is the main producer of this crop; To determine this pesticide, a survey was conducted for cassava farmers (Manihot esculenta Crantz), resulting in the insecticide Cypermethrin, as the pesticide most used to combat pests and the one with the greatest impact on the environment.
Cypermethrin was used as a contaminant to evaluate the microbial viability, through the determination of colony forming units (CFU) of three microbial groups, by means of four biological beds with two repetitions for each treatment with different structured compositions of the The following way: (i) the biological bed number one (L1), is composed of a layer of rice husk, organic fertilizer and soil; (ii) the biological bed two (L2) composed of a straw layer of corn, organic fertilizer and soil, (iii) bed number three (L3), composed of a homogeneous mixture between rice husk, peat and soil layer ; (iv) treatment number four (L4) is composed of a homogeneous mixture of corn straw, peat and soil layer; (v) a control bed that is composed of soil.
The determination of the count of colony forming units (CFU), allowed to determine that the biological bed number three (L3), presented the highest density of bacteria, fungi and heterotrophs, through the four months of study.
Finally, to the experimental design of randomized complete blocks, an analysis of variance was carried out allowing to evaluate the presence and growth of colony forming units (CFU) for three microbial groups (bacteria, fungi and yeast); the pH variations of each treatment were evaluated, making use of IBM SPSS Stadistics software