This study aimed to determine whether the addition of a microencapsulated herbal blend (MHB) based on thymol, carvacrol, and cinnamaldehyde in dairy sheep feed would improve production efficiency, milk quality, and animal health. Thirty lactating Lacaune ewes were divided into three groups: Control (T0), 150 mg blend/kg of feed (T150), and 250 mg blend/kg of feed (T250). Milk was measured before the beginning of the experiment (d 0), at the end of the adaptation period (d 15), and during the experiment (d 20). In milk samples, was measured the composition, somatic cell count (SCC), reactive oxygen species (ROS), lipoperoxidation (LPO), and total antioxidant capacity. The MHB improved the milk production (only T150 vs. T0 sheep on d 20), productive efficiency and feed efficiency, and reduced the milk SCC (only T250 vs. T0 sheep, on d 20), ROS and tended to reduce the milk levels of LPO (only T250 vs. T0 sheep on d 20). Also, MHB reduced the blood levels of neutrophils and ROS (only T250 vs. T0 sheep on d 20) and increased total protein and globulin levels. Thus, a microencapsulated blend of thymol, carvacrol, and cinnamaldehyde improved the productive performance and milk quality of sheep.
This study was aimed at the effects of different Creep-feeding protocols on piglet performance and its residual effects during the nursery phase. Experimental design used was fi ve groups: WC (without creep); DCF (dry creep feeding); WCF (wet creep feeding); LD (additional liquid creep with automatic feed dispenser plus DCF); and LLF (additional liquid creep with linear feeder plus DCF). Ten litters per treatment were selected a total 50 sows and 645 piglets. During the fi rst two weeks of lactation, the LD treatment (2.61 and 4.20 kg) promoted greater body weight (P <0.001) than the DCF (2.55 and 3.93 kg), (WFS) (2.43 and 3.69 kg) and LLF (2.50 and 4.00 kg) treatments, but did not differ from the WC treatment (2.68 and 4.09 kg). At weaning, the WC (5.22 kg), LD (5.32 kg) and LLF (5.27 kg) treatments gave higher body weights (P <0.001) when compared to the DCF (4.97 kg) and WCF (4.69 kg) treatments. We concluded that there was no change in the behavior of the piglets, and the use of dry feed with liquid supplements did not improve weight gain. The different creep feeding systems did not infl uence the weight and performance of the piglets in the nursery phase.
O Brasil é o maior exportador e o terceiro maior produtor de carne de frango. No entanto, esta atividade apresenta alguns desafios, sendo o mais recente a proibição do uso de antimicrobianos como promotores de crescimento. O objetivo deste estudo foi avaliar se a adição de um blend (lisolecitinas, glicerídeos de ácido butírico e glicerídeos de ácido láurico) na alimentação de frangos de corte poderia melhorar o desempenho, a saúde, a qualidade da carne, bem como a capacidade antimicrobiana e coccidiostática, a fim de substituir o crescimento convencional promotores. Frangos de corte (n=180) foram divididos em três grupos com quatro repetições por grupo da seguinte forma: controle positivo - PC (enramicina: 10 mg/kg; coccidiostático/salinomicina: 64 mg/kg, 1 a 35 dias); controle negativo - NC (dieta basal, sem antimicrobianos); mistura - FDH (1 kg/ton, 1 a 42 dias). O desempenho zootécnico foi medido nos dias 1, 14, 21, 35 e 42. Amostras fecais foram coletadas para análise parasitológica e bacteriana nos dias 21 e 42. Aos 42 dias, quatro aves por tratamento foram eutanasiadas para análise da qualidade da carne e morfologia intestinal. Aos 42 dias, maior peso corporal e ganho de peso, além de melhor conversão alimentar foram observados nos grupos FDH e PC em relação ao grupo NC (P = 0,001). O índice de eficiência produtiva foi maior nos tratamentos PC e FDH em relação ao NC. A contagem de Escherichia coli e a contagem de coliformes totais nos grupos PC e FDH foram menores em comparação com NC (P < 0,05) no dia 42 do experimento. A contagens Eimeria spp. nas fezes das aves FDH foram menores em comparação com NC, em contraste com PC (P = 0,047). A relação vilo:cripta foi maior no NC seguido pelo FDH em relação ao PC (P = 0,001). Conclui-se que o uso do blend melhorou o ganho de peso, peso corporal e conversão alimentar, além de proporcionar maior relação vilosidade:cripta e potencializar a ação coccidiostática e antimicrobiana. Portanto, o blend demonstrou alto potencial para substituição de promotores de crescimento na dieta de frangos de corte.
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