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Microbial community characterization of Angus and Nellore cattle during adaptation to high energy diets with different nutritional strategies

Grant number: 19/26533-1
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): November 01, 2020
Effective date (End): May 28, 2021
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
Principal researcher:Danilo Domingues Millen
Grantee:Ana Carolina Janssen Pinto
Supervisor abroad: Garret Suen
Home Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
Research place: University of Wisconsin-Madison (UW-Madison), United States  
Associated to the scholarship:18/17983-0 - Microbial community characterization and ruminal fermentation pattern of Angus and Nellore cattle during adaptation to high energy diets with different nutritional strategies, BP.DR


The objective of this study is to evaluate the effect of different nutritional strategies during the adaptation and termination period, under the ruminal microbial community characterization of cannulated Angus and Nellore cattle. Four Nellore and four Angus steers will be used, with initial body weight about 450 kg, 30 months and cannulated in the rumen, which will be divided into two Latin squares 4 x 4, each square being composed of animals of same race. The periods will be divided as follows: 14 days of adaptation diet (5 days of adaptation 1- 65% concentrate, 4 days adaptation 2- 70% concentrate and 4 days adaptation 3- 75% concentrate) and 18 days of finishing diet (80% concentrate). The diets provided will differ only with respect to the processing of the corn grains and the presence or absence of monensin sodium. Then, the treatments will be as follows: T1) Finely ground corn + monensin (30ppm); T2) Finely ground corn T3) High moisture corn + monensin (30ppm) and T4) High moisture corn. The study will last 149 days, in which animals will be submitted to four experimental periods (32 days each one) and three washout intervals (7 days) between the periods 1 and 2, 2 and 3 and 3 and 4. Samples of ruminal content will be submitted to bacterial community sequencing. (AU)

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