Consumo medio e digestibilidade do feno de capim 'Coast cross' (Cynodon dactylon (l.) pers.) e feij?o guandu (Cajanus cajan (L.) millsp) em carneiros submetidos a dois regimes alimentares Coast cross (Cynodon dactylon (L.) pers.) hay and pigeon pea (Cajanus cajan (L.) millsp) digestibility and nutrients average intake by sheep under two feeding systems

摘要

This experiment was carried out with the objectives of determining the daily average intake (DAI), apparent digestibility coefficient (ADC) of coast cross hay and pigeon pea nutrients and to evaluate the nitrogen balance in sheep. Ten wethers with average weight of 27.50 kg, allotted to suitable cages, were used. A completely randomized design with two treatments (T1=80% coast cross hay+20% pigeon pea and T2=60% coast cross hay+40% pigeon pea) and five replicates, was used. The treatments were evaluated under two feeding systems (voluntary and restrict). Animals receiving ration of T2 presented higher DAI (g/kg PV0.75) (P<0.05) of dry matter (DM), crude protein (CB), crude fiber (CF), organic matter (OM) and nitrogen free extract (NFE), than animals receiving ration of T1. ADC of CF of the T2 were higher (P<0.05) than the ration T1. The nitrogen balance (BN) of animals that received 40% of pigeon pea (13.15 g N/dia) was superior to those receiving 20% of this leguminous (10.29 g N/dia). It can be concluded that the pigeon pea can be used as protein source in the ruminant feeding, making possible ADC for DM close to 52% for animals in voluntary intake and 81% for animals in restricted intake. The increase in the percentage of pigeon pea in the sheep diets fed with Coast-cross hay can result in improvement of diet CF digestibility, as well as, in animals nitrogen balance.