SciELO - Scientific Electronic Library Online

vol.50 número9Acacia mearnsii tannin extract as a feed additive: impact on feed intake, digestibility and nitrogen excretion by sheep fed a tropical grass-based dietThe effects of dietary hot pepper Capsicum annuum waste powder supplementation on egg production traits of Japanese quail layers índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados


Ciência Rural

versión impresa ISSN 0103-8478versión On-line ISSN 1678-4596


MARIN, Luciana et al. Heifers rearing on natural grassland under rotational grazing during warm season. Cienc. Rural [online]. 2020, vol.50, n.9, e20190378.  Epub 14-Ago-2020. ISSN 1678-4596.

This study aimed to evaluate the effect of two rest intervals between grazing on the structural characteristics of pasture and performance of beef heifers in Campos grassland under rotational grazing. The treatments were two intervals between 375 and 750 DD (degree-days) grazing, based on the cumulative thermal sum for leaf expansion of native grasses belonging to capture and conservation groups of resources dominant in a natural grassland. The experiment was conducted during 151 days from October 2015 to March 2016, and twenty-four Braford heifers tests mean age = 12 months; mean body weight = 220kg (± 27.8) were used. The pre-grazing total forage mass (FMt) was on average 3791 kgMSha-1 and did not differ between treatments and season, the same occurred with the non-tussock FM. The average stocking rate was 469 kg ha-1 in both treatments. The average daily gain varied only between seasons, 0.102 kg animal-1 day-1 during spring and 0.372 kg animal-1 day-1 during summer. During the 151 evaluation days, the gain per area was a 103 kgha-1. The use of rest intervals between grazing based on the leaf elongation of dominant grasses, when applied to the areas of Campos grasslands, provided nutritional conditions to reach the target body weight for breeding 24 months old beef heifers.

Palabras clave : Pampa biome; grassland; animal production.

        · resumen en Portugués     · texto en Inglés     · Inglés ( pdf )