Digestabilidade aparente de dietas com diferentes níveis de farelo de arroz integral em cordeiros da raça ovina crioula

Abstract

The sheep industry is seeking animals increasingly young to slaughter, prioritizing the lambs. However, a production system based on grazing does not always prove itself productive, for it depends on the oscillation of food supply. Thus, the use of more intensive production systems, with food supply in times of food shortage presents itself as an opportunity for production rates improvement. The use of feedlot finishing, with use of byproducts of the food industry can be considered an alternative when seeking production at lower cost. The objective of this study was to test the digestibility a total diet, with different levels of rice meal replacement in the dry matter of the total diet, in lambs of the Creole breed. For this trial 22 castrated male lambs with 120 days of age were used. They were divided into three treatments: 0, 15 and 30% of rice meal added to total diet. Consumption determination was achieved by two methods: supply and spare and total feces collection, consisting of five days, conducted in five lambs of each treatment. Also, three samples were collected (at the beginning, middle and end of the study) of concentrates and roughage, in order to determine the qualitative characteristics of the feed. At the end of the experiment it was observed that means of the treatments with 0, 15 and 30% of addition of FAI for dry matter (MS) consumption, expressed in kg/day and % PV, consumption of MO, CPB, CFDN e CFDA, CCNF CCHT, CEMet, CMSD and CMOD, CPBD, CFDND and CFDAD did not obtain significant differences between diets. On its turn CEE expressed significance between treatments (P <0.05). Therefore the inclusion of rice meal in Creole sheep diets in periods of finishing does not cause harm to animals, such as toxicity by ethereal stratum level. Replacement of the energy source of the diet, up to 30% relative to the total concentrate, to satisfactorily meet the nutrient digestibility general productivity rates of the animal.