Banca de DEFESA: ANDRÉ WEBER

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANDRÉ WEBER
DATA : 01/08/2019
HORA: 13:00
LOCAL: Campus Santa Rosa do Sul - Auditório 1
TÍTULO:

FEEDLOT PERFORMANCE AND ECONOMICITY OF STEERS PRECOCIOUS FINISHED FEEDING WITH WHEY

PALAVRAS-CHAVES:

Consumption; Weight gain; Quality of meat; Carcass yield; Economic viability.

PÁGINAS: 81
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
SUBÁREA: Produção Animal
ESPECIALIDADE: Criação de Animais
RESUMO:

The objective of this work was to evaluate the productive performance, qualitative characteristics of the meat and the economicity of beef cattle confined with control diet and whey diet in a completely randomized experimental design with 2 diets and 3 replicates. Twenty four steers, form breed their crosses, with initial live weight of 319.3±11.4 kg and mean age of 11 months, distributed in 6 stalls and fed for 124 days, were submitted to diets offered: concentrate of 40:60, containing 13% crude protein and 68% total digestible nutrients. The diets were composed of corn silage and concentrate, differentiating the whey diet in which was included 14.78% of the dry matter of the whey diet. The results showed similar results (p>.05) of 1.42 kg/day in the average daily weight gain, in the slaughter weight (497±19.94 and 504±21.36 kg), in the carcass weight (279.15±12,54 and 287.77±13.16 kg), in hot carcass yield (56.02±.50 and 56.89±.50%), in the subcutaneous fat thickness (5 25±.92 and 6.50±1.35 mm), in the carcass temperature (7.17±.27 and 7.08±.29 °C), in marbling (8.42±.99 and 7.58±.62), in the meat color values (L* 38.77±0.82 and 38.43± .69; a* 21.09±.58 and 20.02±.58, b* 12.44±.35 and 11.45±.44). Differences (p<.05) between steers fed the control diet and whey were observed in dry matter intake values of 9.39±.15 and 8.40±.14 kg/animal/day and at the pH values observed 6.02±.09 or 6.35±.10, respectively. The economics of the whey diet presented higher profitability than the control diet, with values of R$ 7,213.81 and R$ 3,612.61. The whey inserted into the animals' diet at the inclusion level mentioned in this study did not affect the productive performance and quality of the longissimus thoracis muscle and presented better economic values. The whey can be used in the diet of confined early-cut cattle as an alternative to reduce feed costs.

MEMBROS DA BANCA:
Presidente - 1430573 - MIGUELANGELO ZIEGLER ARBOITTE
Interna - 1085177 - VANESSA PERIPOLLI
Externo à Instituição - RENATO ALVES DE OLIVEIRA NETO - IFC