| Revista: | Scientia Agricola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000455471 |
| ISSN: | 0103-9016 |
| Autores: | Ferreira, Igor Machado1 Homem, Bruno Grossi Costa1 Lima, Italo Braz Gonçalves de1 Dubeux-Junior, José Carlos Batista2 Bernardes, Thiago Fernandes1 Danés, Marina de Arruda Camargo1 Casagrande, Daniel Rume1 |
| Instituciones: | 1Universidade Federal de Lavras, Departamento de Zootecnia, Lavras, Minas Gerais. Brasil 2University of Florida, North Florida Research and Education Center, Marianna, Florida. Estados Unidos de América |
| Año: | 2022 |
| Volumen: | 79 |
| Número: | 2 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Short-term grazing behavior variables are sensitive to the canopy structure and have an impact on daily forage intake. This study evaluated the effect of pre- and post-grazing canopy heights on the forage harvesting process at a patch scale in a mixture of Brachiaria brizantha (Hochst. ex A. Rich.) Stapf. syn. Urochloa brizantha R.D. Webster cv. Marandu (palisade grass) and Arachis pintoi Krapov. & W.C. Greg. cv. Belomonte (forage peanut). Treatments were allocated to a split-plot arrangement in a completely randomized design. The plots, in their entirety, consisted of two pre-grazing canopy heights: 25 cm (CH25) and 35 cm (CH35); subplots consisted of three levels of defoliation severity: no defoliation (DS0); 20% depletion of pre-grazing canopy height (DS20); and 40% depletion of pre-grazing canopy height (DS40), with eight replications. Heifers were allowed to graze the patches (0.7 × 0.7 m) and their grazing behavior was recorded. Canopy structure measurements were taken both before and after grazing. Patches from CH35 presented greater stem mass for grass (p = 0.001) and legume (p = 0.002) than did patches from CH25. Bite rate, bite mass and instantaneous intake rate were greater for CH25 than for CH35 (p < 0.001, p = 0.068, and p = 0.074), and bite mass and instantaneous intake rate were lower for DS20 compared to DS0 (p = 0.032 and p = 0.016). Greater stem mass in the grazing strata negatively influenced the instantaneous intake rate |
| Disciplinas: | Agrociencias |
| Palabras clave: | Leguminosas, Gramíneas, Fitotecnia, Cacahuate, Arachis pintoi, Dosel, Urochloa, Brachiaria |
| Keyword: | Legumes, Gramineae, Crop husbandry, Canopy, Peanut, Brachiaria, Arachis pintoi, Urochloa |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
