Comportamento ingestivo de novilhas leiteiras alimentadas com níveis crescentes de FND na dieta total

Abstract

The objective of the work was evaluate diets with different levels of neutral detergente fiber on ingestive behavior estimation of feed and water consumption. Twelve heifers crossbreed, were blocked in four groups with thre animals. The experimental period lasted 60 days, divided into four periods of 15 days. The complete diets have 51,7; 53,7; 55,7 and 57,7% levels of NDF in the dry matter, being isoproteic. The diets were given directly on the trough, accepting 10% of scraps, and water at ease for after analyze. The eleven first days of each period were destined for adaptation. The first day of collection was destined to chewing mastic and the three days for realization to ingestive behavior, totalizing 72 hours. The lineation experimental used it was a latin square in which for feed in intake comprehend on a 4x4 single, chewing mastic on a 4x4 dual and behavior on a 4x4 triple, respectively. The statistical analysis made were of variance and regression, in effect of command linear and quadratic, by the SAS (2000). The treatments with different levels of NDF influenced (P<0,05) in the consumption of dry matter and water, the feeding time, at the feed efficiency and variation of body weight. Thereby, it is concluded that higher levels than 53,7% of NDF at DM, with inclusion of sugar cane bagasse, alter the ingestive behavior through the reduction on DM intake, which harms the performance of confined heifers.