Adaptabilidade, desempenho produtivo e características do tegumento de ovinos Soinga e Santa Inês.

Abstract

The research aimed to study the adaptability and productive performance and characteristics of the Soinga sheep coat in comparison to Santa Inês. The work was conducted in the sheep sector of the Experimental Farm Research Center for the Development of the Semi-Arid Region (NUPEÁRIDO) of the Rural Health and Technology Center (CSTR) of the Federal University of Campina Grande (UFCG), located in the city of Patos, PB, Brazil . The region has a BSh climate. Twenty-four male, non-castrated sheep, Santa Inês and Soinga, vaccinated for clostridiosis and evermined were used, 12 per genetic group, kept in a confinement masonry shed with asbestos tile in individual 1 m² stalls, 15 days of adaptation and 45 trial period. In the first chapter, a completely randomized design (DIC) was used, with a 2 x 2 factorial with repeated observations over time, with two genetic groups (Santa Inês and Soinga) and two diets roughage: concentrate (50:50 and 70:30) , the assessment of adaptability Respiratory frequency (RF), rectal temperature (TR), surface temperature (TS), black globe temperature index and humidity (ITGU) showed that the Soinga sheep were physiologically adapted, similar to Santa Inês in confinement to the climate of the Brazilian semiarid region. In the second chapter, the objective was to evaluate the productive performance of Soinga in comparison to Santa Inês finished with two levels of concentrate, a randomized block design (DBC) was used, and the Santa Inês genetic group showed better productive performance when the diet presented greater roughage level and did not differ when they consumed the same level of concentrate, in addition, the diet with a higher level of concentrate improved weight gain, conversion and feed efficiency. In the third chapter, the objective was to describe the characteristics of the coat: Thickness of the epidermis (EEp), amount of sweat glands (QGS), amount of sebaceous glands (QGE), amount of hair follicle (QFP) of the Soinga sheep compared to Santa Inês. The design used was a DIC with a 2 x 3 factorial, being two genetic groups (Santa Inês and Soinga) and three body regions (Side, neck and thigh). The histological characteristics of the Soinga sheep coat do not differ from the characteristics of the Santa Inês sheep coat except for the number of sebaceous glands.