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Physicochemical and biological indicators in silages of taro (Colocasia esculenta (L.) Schott) tubers for animal feeding

Abstract:

For assessing the physicochemical and biological indicators in silages of taro (Colocasia esculenta (L.) Schott) tubers for animal feeding, four silages with waste tubers were made. Treatments were: (1-NY) natural yogurt, (2-W) whey, (3-WMB5) whey and 5 %molasses B and 4-WMB10) whey and 10 % molasses B. The experimental design was a completely randomized of simple classification. Regarding the temperature at day zero, treatment 2-W showed the highest value (P < 0.05) (22.65 °C). At day one, 1-NY exhibited the highest value (P < 0.05) (22.53 °C). At days two and three in treatment 2-W the highest values were obtained (P < 0.05) (22.53 - 22.49 °C). From day four, to 180 in the 4-WMB10 the highest temperature was reached 22.83 - 22.54 °C. Regarding pH, at day 0, treatment 3-WMB5 presented the highest value (P < 0.05) 5.4. From day 1 to 4, pH was proportionally reduced in the silages being higher in treatment 2-W, in 0.71 units from day 5 to 180. Later, the pH was stabilized in all silages. Treatment 3-WMB5 showed the lowest value (P < 0.05) (3.93 - 3.83). Fungi, yeasts, total coliform and Escherichia coli were present on day zero and later were absent. There was no Clostridium spp. or Salmonella spp. throughout the study. The physicochemical and microbiological indicators in the silages until day 180 showed a perfect performance, fit for animal feeding.