An experiment in the biotherium of Nutrition Department/UFV aiming to evaluate the effects of rotten corn and the quality of your protein for growing rats. Thirty Wistar female rats early weaned, with 22 days of age and average initial weight of 53.9 ± 3.2 g were assigned to a randomized design. With five treatments and six repetitions with one animal by experiment unity. The treatments consisted in a basal ration (positive control), like a casein standard, four rations with corn that had 2%; 10%, 17% and 38% of rotten corn, and an absent protein ration. The experimental period lasted was 14 days. It was observed higher daily weight gain (DWG), higher daily feed intake (DFI), better feed: gain ratio and bigger net protein ration (NPR), in the rats that received a standard ration of casein than the rats that had a rotten corn, but no difference was observed among rations that had different levels of rotten. In other way, were observed a bigger digestibility coefficients of dry matter (DM), crude protein (CP) and digestible energy (DEin the standard casein ration than rations that had a rotten corn, although higher coefficients had bun observed with 17% and that the similar values bitwen 2% and 38% were probably related to the rotten process. Based on the experiment data, it may be conclude that the increase in the level of rotten did not affect the performance of the animals and that the NPR of the corn was 57.81% of the c standard casein level. The variations observed in the digestibility of the coefficients of the corn may be attributedto the rotten process.
quality; protein; NPR; rats; rotten corn
