Abstract
The objective of this study was to evaluate the probiotic action of two bioadditives and their behavior on the bioproductive parameters and histomorphometric changes of CoBB-500 chickens, in the first 21 days of age. 450 Cobb-500 chicks were used, distributed in three groups of 150 animals each. Control (T1); microbial culture A (T2) and microbial culture B (T3). Substrate T2 (molasses-vinasse) fermented with Lactobacillus acidophillus, L. bulgariccus spp. T3 (molasses-vinasse) fermented with Saccharomyces cerevisiae and Kluyveromyces fragilis (L-4 UCLV). A completely randomized design was used to evaluate live weight, mean daily gain, diarrheal incidence, mortality, relative weight of the digestive tract organs, and histomorphometric changes. In the evaluations carried out at 21 days of age, the weight gain in the chicks that consumed biopreparations (T2 and T3) was higher (P> 0.05). Chickens that consumed biopreparation did not die during the study. The relative weight of the digestive tract organs was higher (P <0.001) in treatments T2 and T3. The length and width of the villi were better in groups T2 and T3 (P <0.05), the depth of the crypts was greater (P <0.05) in T1. Regarding the depth / length relationship of the villi T2 and T3 it was better (P <0.05). It concludes that the inclusion of biopreparations in chicken feed improves weight gain, development and growth of organs of digestive importance. Likewise, a reduction in the occurrence of diarrhea and animal mortality is achieved.
Influences of environmental variables on the weight-length relationship of the shrimp Xiphopenaeus kroyeri: Do variations occur along time?
