Browsing by Author "Ortiz Núñez, Alex Darío"

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    Evaluación de aceites esenciales y antibióticos sobre los índices productivos y morfometría de las vellosidades intestinales en pollos de engorde
    (2018) Ortiz Núñez, Alex Darío; Guerrero, Ricardo
    The objective of this research was to evaluate the essential oils (Active ®) and the antibiotics (Zinc of Bacitracin, Lincomycin and Virginiamicin) in broiler chickens by means of a DCA with 4 treatments and 5 repetitions, the formulation of the diets was made according to the nutritional requirements of the Cobb 500 line and inclusion of the essential oils (T1 ACTIVE: 0.015%) and antibiotics (T2 BACITRACIN: 0.05%, T3 LINCOMYCIN: 0.05% and T4 VIRGINYAMYCIN: 0.05 %), for the evaluation of productive indices, three stages were considered: initial (1 - 14 days), growth (15 - 28 days), fattening (29 - 42 days). In the initial stage, significant results are shown for the weight gain in T1 ACTIVE with 380.05 g and an acceptable feed conversion (1.40), in the mortality there are no significant differences in relation to the other treatments. In the growth stage, no favorable results are seen with T1 ACTIVE for weight gain (1050.44 g) and in the feed conversion (1.50) there are not significant differences between the treatments as the mortality did not show significant differences being 2% in all the treatments. When evaluating the fattening stage, the results were higher, obtaining a weight gain of (1268.96 g) for T1 ACTIVE, a feed conversion of (2.07) that strengthens the productive behavior with a mortality of 0%. The analysis of the accumulated stage reflects favorable results with the use of essential oils for the cumulative weight gain variable with values of (2699.45 g) (64.27 g / bird / day), an accumulated food consumption of (4739.90) ( 112.85 g / bird / day) and a feed conversion of (1.75) reaching a final weight of (2747.99 g). Regarding the IEE in T1 ACTIVE with a value of (356) exceeds the other treatments and a value of (1.24) in I.O.R allows to conclude that the use of essential oils in broilers is economically viable and is considered a profitable production. Last but not least, when analyzing intestinal villi morphometry on day 14 and 28, it was concluded that the variables of intestinal villi height and width, along with the depth of the crypts, obtained beneficial results when using essential oils, expanding their morphometry on day 14 in a width of (6.56%), and the depth of the crypt in (9.82%) and on day 28 the height of the villi in (8.18%, 9.74% width and 23.52%) the depth in relation to the other treatments evaluated, increasing the capacity and absorption area at intestinal level in birds.