PSXIII-8 Grazing Behavior of Cows Grazing Natural Grassland Under Silvopastoral Systems or Full sun

Abstract The objective of this study was to evaluate the grazing behavior mature beef cows natural grassland in silvopastoral systems (SPS) comparison with pasture full sun (FS) during austral summer South America. A total fifty-five Braford crossbred multiparous suckled (352 ± 43 kg) were randomly assigned two treatments, replicates, a complete randomized design: SPS (n=28) and FS (n=27). Global positioning system (GPS) devices placed six selected per treatment (three replicate) track geolocation every five minutes consecutive days. Data analyzed using Java program GRAZEACT determine distance traveled (km), area explored (ha), animal activities (h/d). Type activity defined by based on movement velocity, being categorized as: resting (velocities< 3 m/min), (3< velocities< 25 traveling (velocities >25 m/min). Each these variables automatically calculated for four time periods: Night Pre-Dawn hours (00:00-06:00 h), Daytime (06:00-20:00 Post-Sunset (20:00-24:00 24 h. There effect traveled, area, h period (P ≤ 0.0154). Specifically, had greater = 0.044) < 0.0001) daytime compared FS. In accordance this, same period, lesser spent an extra 1.5 their counterparts. conclusion, changed spatial temporal behavior. provision shade allowed through hours, associated temperatures summer, most-likely improving thermal comfort animals.