Comportamento ingestivo e consumo de nutrientes de cordeiros alimentados com feno de Tifton 85 suplementado com concentrado
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Data
2013-07-24
Autores
Machado, Thiago Jaccoud
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Universidade Federal do Espírito Santo
Resumo
The objective of this research was to evaluate the ingestive behavior and nutrient intake of Santa Inês crossbred lambs fed Tifton 85 hay supplemented with concentrate. Twenty lambs, not neutered, with an initial live weight of 20.3 ± 3.6 kg, in a completely randomized design, with five repetitions were used. Four treatments were studied constituted by Tifton 85 hay associated to four concentrate levels (0.0%; 0.66; 1.33 e 2.0% LW). The diets were provided ad libitum twice a day and the animals were submitted to observation by 24 hours integral periods, in ten-minute intervals, to assess behavioral activities. Dry matter intake (DMI) was estimated through the external indicator technique using the LIPE®. Was no effect of concentrate level on DMI and CPI, over the time spent feeding (TAL) and rumination (TRU), in min/day and min/kg of DM, NDF and CP, and time spent with leisure (TOC) in min/day. The feeding and rumination efficiencies in grams of DM and CP increased linearly with the increasing in the concentrate levels. Conversely, none of the regression models if adjusted to data the efficiency of feeding and rumination expressed in g NDF. In parallel, it was study a correlation between estimates of lambs intake by using external indicator LIPE® and the weight difference between food offered and remains of the diet by interpolations from the behavioral variable feeding time. It was observed a high association between the methodologies for estimating intake of DM and CP, which suggests its use to estimate the individual consumption of feedlot lambs
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Concentrated supplementation , Ethology , External indicator , Etologia , Indicador externo , Suplementação concentrada
Citação
MACHADO, Thiago Jaccoud. Ingestive behavior and nutrient intake of lambs fed Tifton 85 hay supplemented with concentrate. 2013. 92 f. Dissertação (Mestrado em Ciências Veterinárias) - Universidade Federal do Espírito Santo, Alegre, 2013.