Comportamento ingestivo de cordeiros alimentados com silagem de sorgo sacarino

Abstract

The aim of this study was to evaluate the ingestive behavior of lambs kept under feedlot regime fed with sorghum saccharine silage. For the ingestive behavior, 10 animals were used, being sampled from a set of 32 male Suffolk male lambs, not castrated, aged 75 ± 15 days and initial weight of 21 ± 7 kg. The animals were housed in individual stalls, with 2m2 of area, provided with individual mobile feeder and nipple drinker, arranged in covered area. Observations regarding ingestive behavior occurred by recording using the instant scanning method, using seven strategically positioned camcorders, so as not to interfere with the habitual behavior of the animals. They were evaluated by sampling observation every 5 minutes, during three periods of 48 hours, every 15 days, totaling 144 hours of collection, and later visualized by punctuating the time spent with each activity. Being observed and annotated the act of ruminating: animal standing or lying regurgitating, remastigando and redglutindo the food cake, eating: animal consuming food, drinking water: animal ingesting water and leisure: animal standing or lying down showing no movement. The silages of forage sorghum GrandSilo, sorghum sorghum BRS 506, sorghum BRS 511 and BRS 2223 maize (double granitic hybrid) were tested. Diets were formulated based on the requirements of the NRC (2007) for an average gain of 0.200 kg / animal / day, in the ratio of 50% volumoso and 50% concentrate. Two concentrates were formulated for the crude protein (CP) content of the diets: one for corn silage (lower CP content) and one for sorghum silages (higher CP content). Feeding times and water intake expressed in minutes per day were not affected statistically (P> 0.05) between treatments. Animals fed with forage sorghum silage had higher NDT, consequently spending more time ruminating. The rumination time was closer between the forage sorghum silage and the BRS506 saccharin sorghum silage, whereas the BRS511 saccharin sorghum was closer to the corn silage, consequently what happened to rumination influenced leisure, where those who spent more time ruminating Was less leisure time and vice-versa, being statistically similar (P>0,05). The results of this work allow to conclude that the inclusion of sorghum behaved efficiently in relation to the other silages, influencing the ingestive behavior of the animals, especially in rumination time.