Ciencias Agropecuarias

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Has files: YesSubject: search.filters.subject.PROBIÓTICO

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    Evaluación de un cultivo microbiano como promotor de crecimiento en pollos de engorde
    (2017) Escobar Parra, Jorge Enrique; Guerrero, Ricardo
    In the present investigation, a microbial culture was evaluated as a growth promoter in broiler chickens, production indexes of chickens supplemented with a microbial culture and antibiotics used as growth promoters (Enramycin, Virginiamycin, Colistin Sulfate) were compared. We used 210 birds divided into four treatments of 42 animals with 3 replicates per treatment: control T0; T1 microbial culture; T2 enramycin; T3 virginiamycin; And T4 colistin sulfate. We performed an analysis of variance ADEVA and an analysis of means of treatments under TUKEY at 95% probability and it was observed that in the three different phases of life of the birds, there were no significant differences between treatments for body weight, food consumption , Food conversion, where microbial culture presented favorable results demonstrating the same efficacy as the treatments with antibiotics. When comparing costs, it was determined that the microbial culture is considerably more economical than the antibiotics used in this research, obtaining a higher benefit / cost ratio (B / C), therefore this is one of the main advantages of this ecological treatment.
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    Efecto de un probiótico natural sobre la producción y calidad de la leche en bovinos (Bos taurus)
    (2017) Loján Jácome, Miguel Ángel; Kelly Alvear, Gerardo Enrique
    The production behavior of bovine animals (Bos taurus) was evaluated at the "UMBRIA SA" farm in Mejía, province of Pichincha, due to the addition of the natural probiotic in the feed, which were compared with a treatment Control, distributed under a Design Completo a Random, evaluating different productive variables during 62 days of investigation. The animals were fed: TS: forage (ray grass) 13Kg MS, concentrate 5 kg as base diet, T1: diet basis plus 25 g natural probiotic, T2: diet basis plus 50 g natural probiotic; T3: base diet plus 75 g natural probiotic, T4: diet based plus 100 g natural probiotic. The pasture supply was 15 kg DM / cow / day and the nutrient quality of the pasture was 26.1% CP; 1.50 ML Mcal / Kg; 36.4% NDF; 36.4 Mcal / Kg ENM, 5 kg of the concentrate was offered, the nutritional quality of which was 13.1% PC, 1.72 Mcal / kg, 13% FDN; 7.7% FDA. The best milk production (P <0.05) was determined with 26.76 ± 0.80L of milk / cow / day for T4 and TS of 24.03 ± 0.72 L of milk / cow / day. In the analysis of milk quality, fat, protein, solids, lactose, density, salt and pH did not show a significant difference in all treatments with P0.05; T4 had the lowest production cost of $ 0.26 / L. In conclusion the highest yield and lowest cost of milk production was with 100g of natural probiotic in bovine feed (Bos Taurus). It is recommended to transfer the results obtained at the level of dairy farms, in order to use additives that allow to obtain greater production of milk and of optimal quality. KEY WORDS: NATURAL PROBIOTIC, MILK QUALITY, MILK PRODUCTION.