Banca de DEFESA: MARIANA ARAUJO ANDRADE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : MARIANA ARAUJO ANDRADE
DATE: 29/11/2022
TIME: 14:00
LOCAL: Sala virtual- Google meet
TITLE:

LIPID SUPPLEMENTATION WITH CALCIUM SALTS OF SOYBEAN OIL DURING THE SECOND GESTATIONAL IN SKINNED EWES: MATRIX AND PROGENY PERFORMANCE

KEY WORDS:

Maternal nutrition. Carcass characteristics. Performance of pregnant ewes. Production and quality of sheep milk.

PAGES: 37
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUBÁREA: Produção Animal
SPECIALTY: Criação de Animais
SUMMARY:

The manipulation of nutritional management during late pregnancy may have direct effects on performance characteristics through fetal programming. Based on this, the aim of the present study was to evaluate the effects of maternal lipid supplementation with calcium salts from soybean oil during the second half of pregnancy on the performance of sows and progenies from birth to slaughter. The experiment was carried out in the small ruminant sector of the Universidade Federal Rural da Amazônia (UFRA/Campus Parauapebas). 43 multiparous ewes dorper x santa ines with 74 days of gestation were used, they were allocated in individual pens and randomly distributed to the following treatments: Control (CON) - basal diet formulated to meet the basic nutritional requirements of pregnant ewes of a single lamb, or Protected fat supplementation (CSSO) – basal diet plus supplementation with soy oil protected with calcium salts receiving daily 1.5g per kg of body weight. Lambs were weaned and confined when they reached a weight of ±20kg and received a basal diet with estimated daily weight gain (DMG) of 250 g/animal/day until slaughter at ±33kg. Ewes' productive performance data were evaluated regarding consumption, digestibility, production and quality of milk; and lambs' productive performance, morphometric characteristics, quantitative characteristics and carcass yield, and non-carcass components. Data were considered in a 2×2 factorial scheme, maternal nutrition (CON vs. CSSO), and progeny sex (males vs. females). There was no interaction between maternal nutrition and progeny sex (P > 0.05) for the parameters of consumption, digestibility, production and milk composition of ewes; and for the parameters of consumption, digestibility, morphometric measures, cut yield and non-carcass parameters of the progenies. The CSSO diet provided the ewes with a higher ADG during gestation, greater body weight at 135 days of gestation, at parturition and at 40 and 60 days postpartum, greater consumption of ether extract (EE) and TDN, as well as the digestibility of these nutrients. , however decreased the consumption of non-fibrous carbohydrates (NFC). There was a trend of interaction between maternal nutrition and gestational week for dry matter intake in kg per day (P=0.06) and in % of body weight (P=0.085). There was no effect on average milk production (P > 0.05). Supplemented ewes produced milk with lower total dry stratum content (P>0.05) and tended to have lower milk fat content (P=0.080). The resulting progeny of the supplemented ewes had higher birth weight (P<0.05), which provided a tendency towards a lower weaning age (P=0.056), greater lumbar width, internal length and carcass depth (P<0.05 ), lower weight loss by chilling (P=0.01) and greater coverage of fat in the carcass (EGS; P=0.09; Measure GR; P=0.01). Maternal nutrition with calcium salts from soybean oil during the second half of pregnancy increased the ADG, weight and energy intake of ewes without directly altering consumption, providing higher birth weight of the progeny without changing ADG and a lower age at slaughter.

BANKING MEMBERS:
Presidente - 1894011 - RAFAEL MEZZOMO
Interno - 1632663 - LUIS RENNAN SAMPAIO OLIVEIRA
Externo ao Programa - 236.511.898-48 - JULIÁN ANDRÉS CASTILLO VARGAS - UFRA
Externa à Instituição - FABRICIA ROCHA CHAVES MIOTTO - UFG
Externo à Instituição - JOÃO PAULO ISMÉRIO DOS SANTOS MONNERAT - UFRPE
Externa à Instituição - KAROLINA BATISTA NASCIMENTO - UFLA