Ciencias Agropecuarias

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    Efectos de la harina de hojas de brócoli (Brassica oleracea) en los índices productivos y niveles de inmunología A sérica de terneros lactantes
    (2024-08) Claudio Terán, Katy Anabel; Burgos Mayorga, Ana Rafaela
    The aim of this research was to evaluate the addition of B. oleracea in the diet of lactating calves. Three treatments were applied: control with 0 g (no addition), treatment 1 with 10g, and treatment 2 with 20g. Live weight, weight gain, feed consumption, feed efficiency index, immunoglobulin A in serum, and feces consistency were evaluated to find the treatment with the best performance. Twelve calves were allocated in one of the three treatments, each one ended up with four animals. The research was carried out for six weeks, data was collected once daily for feeding consumption and feces, once per week for weight parameters, and two blood samples for serum IgA (the first and the last day of the experiment). Best results were observed with treatment 2 (addition of 20g of B. oleracea) with live weight at week 7 of 69.38kg (p=0.02), weight gain of 33kg (p=0.04), and feed efficiency index of 5.65 (p=0.05). Besides, serum immunoglobulin A at week 7 was greater than other treatments with a mean value of 95.43mg/dL (p=0.0002), and feces consistency was into category 4 which is the ideal for these animals. In conclusion, the addition of 20g of B. oleracea in the diet of suckling calves can increase serum IgA levels and improve productive parameters.
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    Evaluación de Giberelinas para elongación del tallo en col ornamental (Brassica oleracea)
    (2024-08) Galarza Mayorga, Tannia Vaneza; León Gordon, Olguer Alfredo
    The application of gibberellins for stem elongation in ornamental cabbage (Brassica oleracea) was evaluated. As is already known, gibberellic acid promotes cell growth by stimulating the development and elongation of the stem in plants. Therefore, in this research it was proposed to obtain long and thin stems according to the client's needs for marketing. To carry out this research, a Completely Randomized Block Design (DBCA) was used, with two doses of gibberellic acid (D1 47.5 ppm, D2 27.5 ppm) at three different times of application (E1 20 days, E2 35 days and E3 50 days) plus a control (No Application) with three repetitions, for the results a Tukey significance test was carried out at 5%, significant statistical differences were obtained in the treatments. The variables to be evaluated were: stem height (cm) where the D1E3 treatment has the greatest stem elongation with 31.63 cm. In the variable stem diameter (cm), the results obtained were that the D1E3 treatment has an average of 1.04 cm, which is acceptable for commercialization. In the variable equatorial diameter of the rosette (cm), it was found that the D1E1 treatment has an average of 6.94 cm, which is why it is acceptable for commercialization. In the variable number of rosette leaves, it was obtained that the D1E1 treatment results in 56.33 number of rosette leaves. In the variable number of leaves removed, the D1E3 treatment resulted in 16.67 leaves removed from the stem. In the variable days to harvest, it was obtained that the D2E3 treatment was harvested 94 days after transplanting. However, the variables studied can be considered according to the demands of the market and the tastes of the client at the time of marketing.