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Effects of different feeding managements on the microbiome, metabolsim, health and performance of dairy calves

Abstract

The project will be composed of three experiments with the evaluation of different alimentary management and its effects on the ruminal and / or intestinal microbioma, performance and metabolism of dairy calves. In each experiment, 15 calves will be used per treatment in a randomized complete block design. In all experiments the animals will be housed and fed individually, allowing individual daily control of the liquid and solid diets intaker. The animals will be weaned at 56 days, but will be evaluated until 70 days of age. The animals will be evaluated daily using the University of Wisconsin health score system. Blood samples will be collected weekly for the determination of biochemical and metabolic profiles. The animals will be weighed weekly and body measurements will be taken. In the experiment 1 the animals will be fed with high quality colostrum (> 21% brix), being provided: 1) fresh maternal colostrum; 2) frozen maternal colostrum; And 3) colostrum substitute (lyophilized). In experiment 2 the animals will be fed with 6 L / d of different liquid diets: 1) Whole milk, kept under refrigeration; 2) Whole milk acidified with lactic acid to pH 4.2, maintained at room temperature; and 3) Milk replacer. In experiment 3, different solid diets will be evaluated: 1) 16% of NDF in concentrate containing soybean (control); 2) 25% of NDF in concentrate with partial replacement of corn per soy bean; 3) 16% NDF as treatment 1, with grass hay ad libtum; In all experiments fecal samples will be collected on days 0 (birth), 7, 14, 28, 56 (cancellation) and 70 for evaluation of the microbiome. In experiment 3, samples of ruminal content were collected at weeks 2, 4, 6, 8 and 10 of life for determination of fermentation profile, as well as of microbiome. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
VIRGINIO JUNIOR, GERCINO FERREIRA; DA SILVA, ANA PAULA; DE TOLEDO, ARIANY FARIA; POCZYNEK, MILAINE; CEZAR, AMANDA MOELEMBERG; MONTENEGRO, HORACIO; COUTINHO, LUIZ LEHMANN; MACHADO BITTAR, CARLA MARIS. Ruminal and Fecal Bacteriome of Dairy Calves Fed Different Levels and Sources of NDF. ANIMALS, v. 11, n. 9 SEP 2021. Web of Science Citations: 0.
POCZYNEK, MILAINE; TOLEDO, ARIANY F.; SILVA, ANA P.; SILVA, MARCOS D.; OLIVEIRA, GRAZIELA B.; COELHO, MARINA G.; VIRGINIO, JR., GERCINO F.; POLIZEL, DANIEL; COSTA, JOAO H. C.; BITTAR, CARLA M. M. Partial corn replacement by soybean hull, or hay supplementation: Effects of increased NDF in diet on performance, metabolism and behavior of pre-weaned calves. LIVESTOCK SCIENCE, v. 231, JAN 2020. Web of Science Citations: 0.
SLANZON, G. S.; TOLEDO, A. F.; SILVA, A. P.; COELHO, M. G.; DA SILVA, M. D.; CEZAR, A. M.; BITTAR, C. M. M. Red propolis as an additive for preweaned dairy calves: Effect on growth performance, health, and selected blood parameters. JOURNAL OF DAIRY SCIENCE, v. 102, n. 10, p. 8952-8962, OCT 2019. Web of Science Citations: 0.

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