Manejo da novilha e da primípara para melhorar a eficiência reprodutiva

Abstract

The Rio Grande do Sul has about 13,676,000 head of cattle, being the sixth largest herd in the country. The quality of cattle in the state is a reference in Brazil because of the weather and the good nutritional status of pastures favor the creation of European breeds. These factors show the importance of the state in this sector. However, on average reproductive rates are low, the first herding occurs around 36 months, and the pregnancy rate of cows and repetition creates in gilts is around 60% and 20%, respectively. The native grass reduces its quality during autumn / winter and low temperatures cause decreased forage production occurs, which contributes to these low rates. In the state there are numerous properties that use a more traditional setting for custom or lack of knowledge. The adoption of alternatives that meet the deficiency of native grassland in autumn / winter and adjust stocking rate causes the animals gain more weight over the years and achieve the desired weight sooner. Furthermore, understanding the nutritional requirements of primiparous and proper management using tools like pasture or native pasture improved pre and postpartum and traditional weaning with a good nutritional support may improve the rates of repetition creates in cows with good body condition. Already early weaning may serve as a tool for cows that have poor body condition. The different management of women with good nutritional support allows repetition creates over 80% when using pasture or supplement.