Grazing systems, pasture size, and cattle grazing behavior, distribution and gains

• Published in: Journal of range management 1993, Vol.46 (1), p.81-87
• Main Authors: Hart, R. H., Bissio, J., Samuel, M. J., Waggoner, J. W.
• Format: Article
• Language: English
• Subjects: agua potable; Animal husbandry; beef cattle; bovin de boucherie; Cattle; comportement alimentaire; dimension; dimensions; drinking water; duracion; duration; duree; eau potable; feeding habits; Forage; gain de poids; ganado de carne; ganancia de peso; Grazing; grazing intensity; Grazing management; grazing systems; habitos alimentarios; intensidad de pastoreo; intensite de paturage; pastizales; pastoreo; pastoreo rotacional; Pastures; paturage; paturage en rotation; paturages; Range management; Rotation; Rotational grazing; sistemas de pastoreo; Soil water; systeme de paturage; temps; tiempo; time; weight gain
• ISSN: 0022-409X; 2162-2728
• DOI: 10.2307/4002452

Reduced pasture size and distance to water may be responsible for the alleged benefits of intensive time-controlled rotation grazing systems. We compared cattle gains, activity, distance traveled, and forage utilization on a time-controlled rotation system with eight 24-ha pastures, on two 24-ha pastures grazed continuously (season-long), and on a 207-ha pasture grazed continuously, all stocked at the same rate. Utilization on the 207-ha pasture, but not on the 24-ha pastures, declined with distance from water. At distances greater than 3 km from water in the 207-ha pasture, utilization was significantly less than on adjacent 24-ha pastures, at distances of 1.0 to 1.6 km from water. Cows on the 207-ha pasture travelled farther (6.1 km/day) than cows on the 24-ha rotation pastures (4.2 km/day), which traveled farther than cows on the 24-ha continuously grazed pastures (3.2 km/day). Grazing system, range site, slope, and weather had minimal effects on cow activity patterns. Gains of cows and calves were less on the 207-ha pasture (0.24 and 0.77 kg/day, respectively) than on the 24-ha rotation pastures or 24-ha continuously grazed pastures (0.42 and 0.89 kg/da, respectively), with no differences between the latter. Calculated "hoof action" on the rotation pastures was less than that demonstrated to increase seed burial and seedling emergence. Intensive rotation grazing systems are unlikely to benefit animal performance unless they reduce pasture size and distance to water below previous levels, decreasing travel distance and increasing uniformity of grazing.