Desempenho de vacas de invernar em campo nativo e campo nativo melhorado

Abstract

The termination of beef cows on pasture is an economically viable alternative, however, know the variations of animal performance in natural and cultivated pastures is critical to improve the use of such resources. In this study the objective was to analyze weight gain (WG) and average daily gain (ADG) of wintering cows on native pasture improved oat (Avena strigosa) and ryegrass (Lolium multiflorum) in winter period. Was conducted in a private rural property, in Dom Pedrito - RS. 20 animals were used mongrel (SRD), with mean age of 36 months, divided into two groups following the treatment, 10 animals allocated on natural pasture (NP) with an area of 55.5 hectares and 10 animals were subjected to native grassland improved (CNM) with oat and ryegrass in an area of 9 hectares. The weights of the animals were performed with an interval of 21 days, with fasting twelve hours of solid and liquid. The period of grazing was June-July totaling 42 days. The grazing method adopted a fixed capacity of 1.11 head / ha on improved native pasture (CNM) and 0.18 head / ha in natural pasture (NP) in the experimental period. The ADG were subjected to analysis of variance and means were compared by the F test at a significance level of 1%. The TADG were 1.191 and 0.151 kg, respectively, for the CVM and CN treatments. The entrance of the winter, caused a low quality forage, with consequent weight loss generated animals in CN. With this, the incorporation of oats and ryegrass have provided the best animal supplementation and nutrient supply with higher earnings in the period in CNM.