| Revista: | Revista Brasileira de Zootecnia |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000445587 |
| ISSN: | 1516-3598 |
| Autores: | Figueira, Lucas Machado1 Faria, Letícia Rodrigues1 Campos, João Pedro Araújo1 Silva, Débora Regina da3 Furusho Garcia, Iraides Ferreira1 Leite, Rafael Fernandes4 Lima, Renato Ribeiro de5 Alves, Nadja Gomes1 |
| Instituciones: | 1Universidade Federal de Lavras, Departamento de Zootecnia, Lavras, Minas Gerais. Brasil 2Universidade Federal Fluminense, Faculdade de Medicina Veterinaria, Niteroi, Rio de Janeiro. Brasil 3Universidade Federal de Lavras, Departamento de Medicina Veterinaria, Lavras, Minas Gerais. Brasil 4Universidade Federal de Sao Joao del Rei, Departamento de Zootecnia, Sao Joao del Rei, Minas Gerais. Brasil 5Universidade Federal de Lavras, Departamento de Estatistica, Lavras, Minas Gerais. Brasil |
| Año: | 2020 |
| Volumen: | 49 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | The objective of this study was to evaluate the effect of replacing ground corn (402 g kg−1 of dry matter) with rehydrated corn grain silage (RCGS; 425 g kg−1 of dry matter) in a flushing diet on follicular development in tropical Santa Inês ewes. Fifteen ewes were randomly assigned to one of two treatment groups: a diet with ground corn (control, n = 7) or a diet with RCGS (n = 8). The first day of the diets was designated d0, and the diets were fed for 30 days, up to two days after the end of the estrus synchronization protocol. The estrus synchronization protocol (intravaginal progestogen sponge for 11 days plus 300 IU eCG and 37.5 µg d-cloprostenol IM two days before sponge removal) started on d17 of the diets. The number and diameters of ovarian follicles ≥3 mm were assessed by ultrasound on the day before the diets were provided (d−1), on d14, and then daily from two days before sponge removal until ovulation or up to the eighth day after sponge removal. Blood samples were collected on days −1, 0, 6, 12, 18, 24, and 30 for glucose and urea analyses. There was no effect of the treatments on dry matter intake, plasma glucose, and urea nitrogen concentrations, or on the percentage of ewes that ovulated and on the number of ovulations. The number of follicles ≥3 mm did not differ between treatment groups; the number increased between d−1 and d14 and did not differ between d14 and d28. The diameter of ovulatory follicles at sponge removal, the interval from sponge removal to estrus, and the growth rate of the ovulatory follicles were greater in the RCGS group than in the control group, resulting in larger follicles at ovulation. Replacement of ground corn by RCGS in the flushing diet does not increase the number of ovulations but results in delayed onset of estrus and ovulation of larger follicles |
| Disciplinas: | Medicina veterinaria y zootecnia, Agrociencias |
| Palabras clave: | Ovinos y caprinos, Gramíneas, Ensilado, Maíz, Desarrollo folicular, Ovejas, Brasil |
| Keyword: | Sheep and goats, Gramineae, Silage, Corn, Follicular development, Ewes, Brazil |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
