Banca de DEFESA: RODRIGO BARBOSA DE MEDEIROS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RODRIGO BARBOSA DE MEDEIROS
DATE: 18/02/2025
TIME: 08:00
LOCAL: Departamento de Zootecnia/Google Meet
TITLE:

QUALITY OF MEAT FROM SHEEP KEPT IN A LIVESTOCK CROP INTEGRATION SYSTEM IN THE CAATINGA BIOME

KEY WORDS:

Small ruminants; meat quality; shear force; semi-arid; sustainability.

PAGES: 36
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Nutrição e Alimentação Animal
SUMMARY:

The population's growing demand for healthy meats has created a new market that seeks to consume products with better sensory and nutritional quality. Crop-livestock system can be defined as the simultaneous cultivation of agricultural crops and grazing for livestock within the same system in order to optimize productivity per area. In this context, crop-livestock integration in the Caatinga biome could be an important strategy for feeding sheep and improving the quality of the end product. The objective of this study was to evaluate the effect of the crop-livestock integration system in the Caatinga on the quality of sheep meat in order to test the hypothesis that crop-livestock integration systems in the Caatinga can improve sheep meat quality. The research was carried out at the Universidade Federal Rural de Pernambuco, Serra Talhada Academic Unit. The treatments were three crop-livestock systems implanted in the Caatinga, comprised of the sheep livestock integrated with (i) bean crop, (ii) maize crop, and (iii) herb-cotton crop. The control treatment was composed of sole Caatinga rangeland. Twenty non-castrated male lambs (Santa Inês × Dorper crossbreed) aged six months old were used in the study, and they had an initial average weight of 24.64 ± 2.95 kg. A completely randomized design with four treatments and five replications was adopted. The experiment was conducted for 42 days and at the end of the experimental period the animals were slaughtered. The physicochemical characteristics and sensory attributes of sheep meat were evaluated using the Longissimus lumborum muscle. All variables were subjected to the analysis of variance followed by the Tukey test, using the GLM procedure of Statistical Analysis Systems. The differences were significant at 5% of error probability. The integrated systems did not significantly affect the pH values, water, ether extract, ash, cooking loss, water holding capacity, lightness (L*) and redness (a*) (P>0.05). However, there was significant difference for proteinm, yellowness (b*) and Waner-Bratzler shear force (P<0.05). Integrated crop-livestock system in the Caatinga biome is recommended for improving the physical and chemical characteristics of meat from sheep, with the tenderness of the meat being higher in the maize treatment.

COMMITTEE MEMBERS:
Presidente - EVARISTO JORGE OLIVEIRA DE SOUZA
Externo à Instituição - DANIEL CEZAR DA SILVA
Externa à Instituição - KELLY CRISTINA DOS SANTOS