Banca de DEFESA: LUIZ WILKER LOPES DA SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : LUIZ WILKER LOPES DA SILVA
DATE: 26/02/2024
TIME: 15:00
LOCAL: Remota
TITLE:

Lipid sources associated with “Palma Orelha de Elefante Mexicana (Opuntia stricta (HAW.) (HAW.)) in the diet of finishing sheep

KEY WORDS:

fatty acids

productive performance

food intake

Opuntia stricta

Lipid supplementation

PAGES: 62
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
SPECIALTY: Avaliação de Alimentos para Animais
SUMMARY:

Different forms of dietary energy density and modulation of ruminal fermentation were evaluated in sheep feeding, in this sense, the use of lipid sources associated with cactus cladodes “Palma Orelha de Elefante Mexicana” as an alternative to increase the caloric increment of diets, in addition to ruminal modulation and production of meat with a better fatty acid profile. In research carried out in the sheep farming sector of the Federal Rural University of Pernambuco (UFRPE), three experimental diets were evaluated, consisting of fixed percentages of 30% Tifton 85 grass hay and 30% “Palma Orelha de Elefante Mexicana”, based on the material dry. Lipid sources (crushed cottonseed, extra fat whole corn germ and dry coconut residue) were incorporated into the three concentrates. The diets were isoproteic and water was provided ad libitum. It used 39 animals, arranged in 3 experimental diets named after the inclusion of the lipid source, namely CAT (crushed cottonseed), GIMEX (Extra Fat Whole Corn Germ) and RSC (Dry Coconut Residue). A completely randomized experimental design was used, and the initial weight of the animals was used as a covariate. Intake dry matter (DMI) and other nutrients evaluated differed (P<0.05) between the animals, the sheep fed the CAT and GIMEX diets had higher consumption than the RSC for all these variables. The experimental diets did not differ (P>0.05) in terms of nutrient digestibility, with the exception of non-fibrous carbohydrate and ether extract. Animals fed the RSC diet had the lowest values (P<0.05) for feeding and rumination efficiencies. The performance of the animals did not differ (P>0.05) depending on the diet offered. The weights and carcass yields of animals consuming RSC were lower (P<0.05) when compared to carcasses of animals receiving CAT and GIMEX. The carcasses of sheep fed with GIMEX obtained higher scores in terms of the subjective measure “finishing” and the objective measure of carcass compactness index. Animals receiving the RSC diet had greater amounts (P<0.05) of short-chain fatty acids (SCFA) in meat, while animals consuming CAT had greater (P<0.05) amounts of polyunsaturated fatty acids in meat. The trans10/trans11 ratio and the amount of biohydrogenation intermediates in meat differed (P<0.05) depending on the diet, sheep on the GIMEX diet obtained the best results. The use of RSC promoted an increase in stearoyl-CoA desaturase (SCD) enzyme activity. The use of GIMEX and CAT in sheep feeding promotes similar performance and better meat quality in terms of fatty acid profile, when compared to RSC, both of which can be used in combination with Mexican elephant ear palm in feeding growing sheep.

COMMITTEE MEMBERS:
Presidente - FRANCISCO FERNANDO RAMOS DE CARVALHO
Externo à Instituição - ARIOSVALDO NUNES DE MEDEIROS - UFPB
Externo à Instituição - DORGIVAL MORAIS DE LIMA JUNIOR - UFERSA
Externo à Instituição - MICHEL DO VALE MACIEL - UFAM
Externa à Instituição - STELA ANTAS URBANO - UFRN