Consumo e digestibilidade de aveia preta em caprinos de corte recebendo quatro níveis de suplemento

Abstract

The present study is to evaluate the intake and digestibility of oat IPR 61 (Avena strigosa), by meat goats receiving levels of concentrate supplementation.Was used eight goat males with nine months old and averaging 30 kg of body weight distributed by design completely randomized with four levels of concentrate intake: 0%, 0,5%%, 1%, 1,5%%, the BW. Trials were performed in IAPAR, Pato Branco, during the months from August to October in the years 2011 and 2012, a total of five periods valid observation.All treatments were given water and oats ad libtum fresh twice daily (8:30 am and 4pm) each treatment and their respective level of concentrate.Evaluation periods were fifteen days each ten days of adaptation and five data collection.There replacement ratio in the consumption of food by the use of concentrated 33%.The dry matter intake (DMI), organic matter, (OMI), digestible organic matter (DOMI), and organic matter roughage (OMRI) were influenced (P> 0.05) by concentrate level. The average consumption of these respective variables also suffered increasing influences of periods, and the DM content of forage (P> 0.05) and were higher for the period of five, when the DM content of the pasture was greater. Associative effect was found between levels of concentrate and parameters for organic matter digestibility: apparent (DOM), and real (DOMr)., Digestibility of neutral detergent fiber (NDFD), was not altered. The intake and digestibility of nitrogen and faecal excretion have not changed the level of concentrate, or by periods. Fecal excretion of N was increased to the levels of consumption influenced by the DM content of the forage and concentrate intake: (y = 287.42 + cmoconcgdia * 82.09 + (excrecaoNdia) * 78.37 -% Nfecal * 208 , 4) (R ² = 0, 72). The supply of these concentrated levels of this work is efficient in improving the levels of consumption and diet digestibility in goats maintained on oat pasture.