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Effect of either nutritional restriction or intake of concentrate feedstuffs on adaptation time, feedlot performance, feeding behavior, ruminal health and carcass characteristics of Nellore cattle

Grant number: 15/00106-9
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2015
Effective date (End): February 28, 2019
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Mário de Beni Arrigoni
Grantee:Murillo Ceola Stefano Pereira
Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
Associated scholarship(s):17/05316-7 - Effects of supplemental methionine and zinc on feedlot performance, carcass characteristics, muscle satellite cells, protein extraction and rumen morphometrics of cattle fed high-grain diets, BE.EP.DR


The objective of this study will be to evaluate the effects of either previous nutritional restriction or previous intake of concentrate feedstuffs on days to adapt to high-concentrate diets, feedlot performance, feeding behavior, rumen health and carcass traits of Nellore cattle. The treatments will be disposed as follows: Maintenance (forage ad libitum + mineral supplement); Restriction (forage restricted at 1,4% of body weight + mineral supplement), and Concentrate (forage ad libitum + 0,5% of body weight of a mix of concentrate feedstuffs and mineral supplement). It will be used 120 Nellore yearling bulls, with approximately 380 kg of body weight. Cattle will be blocked by weight, and randomly distributed in 24 pens, which will be considered the experimental unit. This study will last 110 days, divided into 2 phases: 28 days of pre-adaptation, in which the treatments previously described will be applied, and 84 days of feeding high-energy diets. In the beginning of the trial and every 28 days all animals will be weighed. Dry matter intake will be measured every day, and then calculating the average daily gain and gain to feed ratio. Similarly, the animals will undergo ultrasound assessments at the beginning and end of the feedlot period to evaluate the deposition of muscle and fat in the carcass and slaughtered at a commercial packing. Will also be assessed in this project as response variables: 1) days to adapt to high-concentrate diets; 2) feeding behavior and ration of selectivity; 3) dry matter intake fluctuation and net energy observed; 4) rumenites, morphology, histology and immunohistochemistry of rumen epithelium; 5) incidence of liver abscesses; 6) carcass traits. (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)
PEREIRA, M. C. S.; DELLAQUA, J. V. T.; SOUSA, O. A.; SANTI, P. F.; FELIZARI, L. D.; REIS, B. Q.; PINTO, A. C. J.; BERTOLDI, G. P.; SILVESTRE, A. M.; WATANABE, D. H. M.; et al. Feedlot performance, feeding behavior, carcass and rumen morphometrics characteristics of Nellore cattle submitted to strategic diets prior the adaptation period. LIVESTOCK SCIENCE, v. 234, . (14/26210-4, 15/00106-9)
PINTO, ANA C. J.; BERTOLDI, GUSTAVO P.; FELIZARI, LUANA D.; DIAS, EVANDRO F. F.; DEMARTINI, BRENO L.; NUNES, ANA B. C. P.; SQUIZATTI, MARIANA M.; SILVESTRE, ANTONIO M.; OLIVEIRA, LUCAS F. R.; SKARLUPKA, JOSEPH H.; et al. Ruminal Fermentation Pattern, Bacterial Community Composition, and Nutrient Digestibility of Nellore Cattle Submitted to Either Nutritional Restriction or Intake of Concentrate Feedstuffs Prior to Adaptation Period. FRONTIERS IN MICROBIOLOGY, v. 11, . (15/00106-9, 14/26210-4)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PEREIRA, Murillo Ceola Stefano. Feedlot performance, feeding behavior, carcass characteristics, rumen and cecum morphometric of Nellore cattle submitted to either nutritional restriction or intake of concentrate feedstuffs before beginning the adaptation period. 2019. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Medicina Veterinária e Zootecnia. Botucatu Botucatu.

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