Digestibilidade aparente de dietas contendo dejetos de suínos in natura

The objective of this study was to evaluate the apparent digestibility of nutrients in rations containing four levels of fresh pig waste (36, 20, 13 and 0 percent), fed in natura for cattle, replacing a concentrate with 23 percent of crude protein. The total digestible nutrients intake, digestible dry matter and digestible organic matter were also evaluated. The pig wastes was collected daily and fed in natura to Holstein steers. The forage used was the elephant grass. The chromic oxid was used as an indicator for the determination of the digestibility coefficient. The apparent digestibility of dry matter, organic matter, carbohydrate, crude protein and fat, in the treatment without waste was higher than one of the treatment with 36 percent of waste. The apparent digestibility of the neutral detergent fiber did not differ among treatments, being low in all of them. The apparent availability of calcium, phosphorus and magnesium increased with the withdrawal of the pig waste from the diet. The potassium had an inverse conduct. The digestible dry matter and organic matter intakes and total digestible nutrients improved with the withdrawal of the waste from the ration.