Banca de DEFESA: MATHEUS ROCHA DO CARMO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MATHEUS ROCHA DO CARMO
DATE: 24/02/2023
TIME: 08:00
LOCAL: On line
TITLE:

NUTRITIONAL EVALUATION OF DEACTIVATED SOYBEAN AND ITS USE IN DIETS WITH AND WITHOUT PROTEASE ENZYME ON THE PERFORMANCE OF GROWING AND FINISHING PIGS

KEY WORDS:

Protein feed; Performance; Antinutritional factors; Metabolism; Swine farming

PAGES: 47
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
SPECIALTY: Avaliação de Alimentos para Animais
SUMMARY:

The objective was to evaluate the nutritional value of whole deactivated soybean (SID) in pigs through metabolism assay and the effect of diets with and without SID containing or without the enzyme protease on the performance of these animals in the growth and finishing phases; carcass characteristics and economic viability. In the metabolism assay by the total collection method, 16 immunocastrated male pigs in the growing phase were used to verify the metabolizability coefficients of dry matter (DM), organic matter (OM) and crude protein (CP), and to determine the digestible energy (ED), metabolizable energy (AME) and metabolizable energy corrected for nitrogen (AMEn). In the performance experiment, 60 immunocastrated male pigs and 60 female pigs in the growing and finishing phases were used in a randomized block design with 15 repetitions (one animal/plot). The treatments were a 2 x 2 factorial, being diets without and with SID and without and with protease enzyme. The diets were formulated to meet the nutritional requirements for each phase, establishing equal diets for immunocastrated males and females, considering the requirements of the females. The nutritional characterization of the SID and the diets was made through centesimal analysis. In performance, daily weight gain (DWG), daily feed consumption (DFC), feed conversion (FC), carcass characteristics and economic viability were evaluated. The economic feasibility was performed by determining the feed cost (R$), cost/kg of weight gain (GP), economic efficiency, gross and net revenue. Metabolizability coefficients of DM, OM and CP of SID were 83.77%, 84.43% and 89.18%, respectively.The respective values of ED, AMS and AMEn were 4904, 4909 and 4656 kcal/kg. In performance and carcass characteristics no significant interaction was observed, and when studying the factors separately in growth phase II, final and total. However, in growth phase I (30 to 50 kg BW) the enzyme increased the DWG (P=0.02) and DFC (P=0.0363) of pigs fed diets without SID, showing no effect (P>0.05) on the FC. However, in this same phase, studying the effect of SID it was observed that animals fed diets containing this ingredient was improved DWG (P=0.030) and FC (P=0.0484) when these diets did not contain enzyme. When performing the economic feasibility, in phase I (30 to 50 kg) there was a reduction of 4.18% (P=0.0295) in cost/kg GP and improved economic efficiency (P=0.0195), gross revenue (P=0.0255) when added in diets without SID. In phase II (50 to 70 kg) when SID was added to the diets there was a reduction of 4.26% in cost/kg of GP (P=0.0420) and better economic efficiency (P=0.0193) in diets containing the enzyme. As for the enzyme in this phase, it significantly altered the cost/benefit of the diets, as well as in the final phase and in the total period. Thus, it is inferred that the use of SID and the enzyme in the diets provides better performance indices and economic profitability compared to diets based on corn and soybean meal when offered to pigs in growth phases I and II, where the animals require greater protein intake.

COMMITTEE MEMBERS:
Presidente - MARIA DO CARMO MOHAUPT MARQUES LUDKE
Interna - LILIAN FRANCISCO ARANTES DE SOUZA
Externo à Instituição - WILSON MOREIRA DUTRA JUNIOR