Ciencias Agropecuarias
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Item Efecto del Rhodobacter Sphaeroides sobre los índices productivos y digestibilidad aparente en pollos de engorde(2025-02) Maliza Pacha Nelly Elizabeth; Guerrero López Jorge RicardoThe objective of this study was to evaluate the addition of Rhodobacter Sphaeroides in different doses on the productive índices and the apparent digestibility of nutrients. For this purpose, four treatments werw used; T0 control group without the addition of R. Shpaeroides; 1 ml of R. Shpaeroides; T2 with 2 ml of R. Shpaeroides and T3 with 3 ml of R. Shpaeroides per liter of wáter. For the study, 200 one- day- old male and female broiler chickens of the Cobb 500 line were used. Through a completely randomized design with 10 repetitions per treatment and 5 animals per repetition. The data obtained were evaluated with the Infostat statistical program using the Tukey test with a significance leve lof 95 %. The productive period was divided into four stages: initial (0- 10 days); growth (11- 22 days); finisher I (23- 42 days) and finisher II (43- final), while the evaluation of the apparent digestibility of nutrients was carried out in a periodo f 35- 42 days of age. Regarding the results, T3 presented better result in terms of final weight (3052.29 g); weight gain (3012.61 g) and European Efficiency Index (318.72), while feed consumption (g) anda feed conversión index did not present significant differences (P< 0.05). Regarding the apparent digestibility of nutrients, there were no major significant differences (P> 0.05).Item Efecto de la harina de cúrcuma (Cúrcuma longa) y romero (Rosmarinus officinalis) en los índices productivos y coccidiosis en pollos de engorde(2024-08) Medina Vera, Pamela Alexandra; Guerrero López, Jorge RicardoThe objective of this study was to evaluate the addition of turmeric (C. longa) and rosemary (R. officinalis) in different doses, on the productive indices and the oocyst count of Eimeria spp, for this we worked with nine treatments, each combined according to the established dose, being for C. longa (0, 0.02, 0.05 %) and R. officinalis (0, 0.05, 0.1 %) respectively. For the study, 270 one-day-old Cobb 500 mixed chickens were used. By means of the completely randomized DCA design with factorial arrangement with 3 replicates for each treatment and 10 animals per repetition. The data were evaluated with the statistical program Infostat by means of the Tukey test at a significance level of 95%. The analysis was carried out in three different stages (initial, growth and fattening) respectively, while the measurements for the evaluation of oocysts of Eimeria spp were carried out in 3 periods (27, 35 and 48 days of age) respectively. Regarding the results, there were no significant differences greater than (P>0.05) in the production indices: Final weight (g), Weight gain (g), Feed intake (g), AQI (g/g), IEE, Mortality %, Cost/Benefit (C/B). In relation to the evaluation of oocysts of Eimeria spp., statistical differences could be observed in the intake at 48 days of age, the treatment that obtained a better result was T5 with an average of 29.17 oocysts/g of feces.Item Evaluación del butirato de sodio sobre los índices productivos y morfometría de las vellosidades intestinales en pollos de engorde(2024-08) Izurieta Buenaño, Sofía Anahí; Guerrero López, Jorge RicardoThe present research project evaluated the effects of sodium butyrate (SB) on productive indices and intestinal (duodenal) villi morphometry in broilers. A total of 400 one-day-old Cobb 500 male chickens were divided into 5 treatment groups, each with 4 replicates, in a completely randomized design; The diets were formulated as follows: T0 (-) (control), T1 (0.05% BS), T2 (0.10% BS), T3 (0.15% BS) and T4 (+) (0.05% flavomycin). During the entire experimental period (42 days), inclusive, in the 4 evaluation phases (pre-initial, initial, fattening and finishing), the chickens did not show statistically significant differences between treatments (p>0.05) on the productive indices (final weight, weight gain, feed consumption and feed conversion ratio); Similarly, no statistically significant differences (p>0.05) were found for the variables crypt depth, duodenal villus length and width on days 21 and 35. However, according to the cost: benefit (C/B) ratio, T1 and T3 showed a higher profit (9 cents per dollar invested), followed by T0 (6 cents), T4 (3 cents) and T2 (2 cents). In conclusion, the addition of BS does not improve the productive indices and duodenal villus morphometry of Cobb 500 chickens, although it is estimated that it shows a greater economic benefit.Item Evaluación de harina de canela (Cinnamomum verum) sobre los índices productivos y morfometría de órganos linfoides en pollos de engorde(2024-02) Silva Arévalo, Daniela Alexandra; Guerrero López, Jorge RicardoThe objective of this study was to analyze different percentages of cinnamon flour addition in broiler chicken diets, with 0.05%, 0.075% and 0.1% being evaluated, and their effects on production indices and cost/cost ratio. benefit of different treatments. Four different treatments were studied, including a control with 0% cinnamon flour. For this work, a completely randomized statistical design was carried out, which consists of three repetitions for each treatment applied, which presented 10 experimental units adding up to a total of 120 chickens. The analysis of the means was performed using Tukey's statistical test at 95% reliability. It was divided into three stages of productive period, initial (0-7 days), growth (8-21 days), and fattening (22- 35 days). It was concluded that in the different stages, it was established that the best treatment was T3, on day 28 with greater weights in the spleen (1.3 g), bursa (2.2 g) and thymus (4.4 g), with respect to on day 35, there are no statistically significant differences between the treatments, and regarding the cumulative analysis, differences were obtained in terms of final weight and European deficiency index, with the most viable treatment being T3 with the addition of 0.1% cinnamon flour. by presenting good productive performance and a cost/benefit ratio of 1.4 points. Keywords: broiler chickens, cinnamon flour, production indices.Item Efecto del ajo (Allium Sativum) sobre los índices de producción y Eimeria spp en pollos de engorde(2024-02) Rojas Chunio, Nataly Tatiana; Guerrero López, Jorge RicardoThe aim of this study was to analyze different percentages of addition garlic (A. Sativum) in different doses on the productive indexes and the oocyst count of Eimeria spp, for which four treatments were used: T0: control without addition of (A. Sativum); T1: with 0.15% of (A. Sativum); T2: with 0.25% of (A. Sativum) and T3: with 0.3% of (A sativum). It was evaluated in 160 broilers of the cobb 500 line, one day old. By means of an experimental design with 4 replicates by treatment and 10 animals by replicate, the data obtained were evaluated with Tukey’s statistical test with a significance level of 95% using InfoStat as the statistical program. The productive period was divided into three stages: Initial (8-12 days); Growth (13-28 days) and Fattening (29-49 days) while samples were taken to count oocyts of Eimeria spp on days 35 and 49, for which 10 animals by treatment were sacrificed to obtain fecal samples directly from the intestine, which were evaluated in the laboratory with the floatation technique an the McMaster chamber. The best results were obtained with the T3 treatment with the addition of (3%) of (A. Sativum), finding better results in productive indexes with a weight gain of (2411.98 g) and a feed conversion of (2.08). It also showed a lower quantity of oocysts by g/feces and a good cost/benefit of 1.20. Key words: broilers, A. Sativum, productive indexes, Eimeria spp.Item Evaluación del aceite residual de comida rápida sobre los índices productivos en pollos de engorde(2023-09) Sailema Criollo, Bryan Andrés; Guerrero López, Jorge RicardoThe objective of this study was to analyze different percentages of addition of residual oil in diets of broilers, being evaluated 1.5%, 2% and 2.5%, and their effects on production indices and cost/benefit ratio. of the different treatments. Four different treatments were studied, including a control with 0% residual oil, for the present work a completely random statistical design was carried out, which consists of five repetitions for each treatment applied, which presented 10 experimental units adding a total of 200 chickens. The analysis of the means was carried out using Tukey's statistical test at 95% reliability. It was divided into three stages of productive period, initial (0-7 days), growth (8-21 days), and fattening (22-35 days and 36-42 days). It was concluded that in the different stages there were no significant differences between treatments in terms of productive performance, however, in an accumulated analysis differences were obtained in terms of final weight and European efficiency index, being the most viable treatment T1 with the addition of 1,5 % of residual oil, presenting a good productive performance and a cost/benefit ratio of 1.19 points.Item Evaluación de tres niveles de un regulador metabólico orgánico sobre los índices productivos y bioquímica sanguínea en pollos de engorde(2023-03) Santana Moya, María Belén; Quinteros Pozo, Orlando RobertoThe experimentation was carried out to evaluate a metabolic regulator and how it can affect productive parameters and blood chemistry in broilers. This trial was carried out with the administration of 1 ml of metabolic regulator per liter of drinking water during the last 5 days of each stage in which the experiment was carried out (initial, growth and completion) and compared with the control group without the metabolic regulator. For this experiment, 300 birds were divided into four experimental units named T0, T1, T2, T3, each with three repetitions of 25 chicks. At the end of each stage, the necessary data were obtained to measure the productive parameters (initial weight, final weight, feed consumption, feed conversion, mortality) and blood chemistry with the objective of establishing the liver health of the birds by measuring the serum levels of ALT, AST, FA, GGTA, urea, cholesterol and triglycerides. Analysis of Variance and the Turkey Test were used for data analysis. Thus, the results obtained for the productive parameters are significant (P>0.05) for the initial stage or T1 with these results: weight gain of 183.45g, feed consumption 213.8g, Feed Conversion of 1.16 and a 0% mortality and in the growth stage or T3 with a weight gain of 300.29g, feed consumption of 561.36g, Feed Conversion of 1.53 and a 0% mortality, in the growth stage or T2 there was no significant difference with the product used with the following results: Weight gain of 240.12 g, feed consumption with 354.91gr, feed conversion of 1.48, and a mortality of 1.33%. Blood biochemistry results showed lower serum levels of AST, GGT, ALT, FA, which indicate that there is no liver damage compared to the control groupItem Evaluación de un sustrato gluconeogénico sobre los índices productivos y perfil lipídico en pollos de engorde(2023-03) Ibarra Silva, Flor Daniela; Guerrero López, Jorge RicardoThe objective of this research was to evaluate different proportions of inclusion of a gluconeogenic substrate (0:100; 25:75; 50:50; 75:25; 100:0), on the productive indices, lipid profile and cost/benefit of each one of the treatments. A completely randomized design (DCA) was used, with five treatments, one of them as control, together with five repetitions, with 10 experimental units, with a total of 250 broilers; The separation of means was performed with the Tukey statistical test at 95% reliability. Three physiological stages were evaluated: initial (0-14 days), growth (15-28 days) and final stage (29-46 days). It was concluded that the best treatment was T1 with an inclusion of gluconeogenic substrate and palm oil of 25:75 respectively, presenting good productive indices and economic viability. Statistical differences were presented for the final weight and feed consumption, but for feed conversion, carcass yield and IEE, no statistical differences were obtained. In the same way, the analytes of the lipid profile are within the range for the five treatments.Item Evaluación la harina de hoja de yuca (Manihot esculenta) sobre la pigmentación e índices productivos en pollos de engorde(2023-03) Riera Suarez, Jerson Alexander; Guerrero López, Jorge RicardoThe objective of this research was to evaluate different levels of integration of cassava leaf meal (0%, 2%, 4%, 6%), on productive indices such as feed conversion, weight gain, mortality, carcass yield, also determine the degree of pigmentation and the benefit/cost of each treatment; For this, a completely randomized design (DCA) was used, which had 4 treatments, of which one of them corresponded to the control, six repetitions per treatment and consisting of 10 experimental units for each repetition, making a total of 240. chickens used. The distribution of means was analyzed using Tukey's statistical test at 99% reliability. Three stages were evaluated, the first was the initial stage (1 - 8 days of age), the second was the development stage (9 - 28 days of age) and the last one was the finishing stage (29 - 45 days of age). It was determined that the best result corresponded to T1 with an inclusion level of 2% of M. esculenta flour, presenting the best results and significant differences in terms of final weight and weight gain. However, no significant differences were found in relation to feed conversion, carcass yield and pigmentation.Item Evaluación del efecto anticoccidial de la saponina de alfalfa (Medicago sativa L.) adicionada en la dieta de pollos de engorde(2022-09) López Gutiérrez, Mijael Alexander; Rosero Peñaherrera, Marco AntonioThe research work was carried out in the Chiquicha parish of Pelileo canton, Tungurahua province, located at 2598 meters above sea level at 1°16'0'' south latitude and 78°31'60'' west longitude. The objective was to evaluate the anticoccidial effect of alfalfa saponin (Medicago sativa L) included in the diet of broilers, a completely randomized design (DCA) was applied with 4 treatments: T1 (10 g of alfalfa saponin extract /40 kg of feed), T2 (20 g of saponin extract from alfalfa/40 kg of feed), T3 (30 g of saponin extract from alfalfa/40 kg of feed) and T4 (0 g of saponin extract from alfalfa). alfalfa/40 kg of food) with 3 repetitions. The results obtained were for the variable number of oocysts/g of feces, on day 19 (5 post inoculation) and 21 (7 post inoculation) being the best T (10 - S), T (20 - S) and T (30 –S) with a mean of 0.00 ooq/g, on day 23 (9 post inoculation) the best treatment was T (30 - S) with a value of 50.00 ooq/g. On day 25 (11 post inoculation) the best result is presented by treatment T (20 – S) with a value of 166.67 ooq/g, for day 27 (13 post inoculation) the best result was obtained in T (30 – S) with a value of 333.33 ooq/g, on day 35 (21 post inoculation) the value of 1450.00 ooq/g was for treatment T (30 - S), on day 42 (28 post inoculation) and 49 (35 post inoculation) the same behavior was presented as in the previous days, obtaining a value of 25626.67 ooq/g and 104150.00 ooq/g respectively. Finally, on day 56 (42 post inoculation) the best result was T (30 – S) with 107416.67 ooq/g, while the treatment that presented the highest number of oocysts in the investigation is (T – 0). On the other hand, the productive indices such as: live weight, feed conversion and European index were better in the birds fed with alfalfa saponin extract, while weight gain was better in the treatment that did not include the saponin extract in its feed. diet.