Produção e composição bromatológica de pastagem estrela africana submetido a doses de nitrogênio, sob pastejo

Abstract

The Brazilian cattle industry today after undergoing several modifications occupies a prominent position in the international market of meat and milk. The State of Paraná is the second largest milk producer in Brazil, especially in the southwest region with significant increase in production. Activities these dependent pastures based feeding for animals. The choice of species should be taken considering its adaptability to the region. The Southwest this state has great potential for the production of fodder Cynodon because of its tropical climate. The African Star (Cynodon nlemfuensis) is a major grasses used in the feeding of Brazilian herds, but are not always handled correctly, often expressing low productive potential or pasture degradation. This paper evaluates the behavior and chemical characteristics of the African star quality associated with nitrogen fertilization. In this work we aimed at defining the optimal dose of nitrogen to be used in the microclimate conditions of the Vale do Iguaçu region where the farm São Marcos is located in Dois Vizinhos - PR, where the fieldwork was conducted. The experimental area has 192m ², divided into 4 blocks with 4 plots each (12sqm each plot) with four treatments (40, 190, 340 and 490kg N / ha / year) and four replicates, separated by three vertical hallways two meters wide and 12 feet long, totaling 264sqm. Monthly sections were performed, collecting samples that were subjected to drying and chemical analysis carried out at the Laboratory of Food Science UTFPR – Câmpus Dois Vizinhos. Differences were found between the doses of N for PB, PROD. MV and MS, where levels of nitrogen fertilization resulted in increased production values, and a reduction in the content of neutral detergent fiber of forage