Produção, composição química e digestibilidade de capim marandu sob fertilização nitrogenada e orgânica líquida

• Ano de defesa: 2015
• Autor(a) principal: Neves, Rafaela Guerra
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Ciências Veterinárias; Centro de Ciências Agrárias e Engenharias; UFES; Programa de Pós-Graduação em Ciências Veterinárias
• Palavras-chave em Português: Brachiaria brizantha; Bromatologia; Substâncias húmicas; Uréia; Ciências Agrárias
• Link de acesso: http://repositorio.ufes.br/handle/10/7794

The pasture areas are configured as the largest country of the crop, and food source almost exclusively of Brazilian cattle, however the extractive form of livestock exploitation is increasing the pastures, and one way to reverse this situation is to work with the reconstitution of soil fertility also promoting improvements in the nutritional value of these forages in this context nitrogen (N) stands out as one of the main nutrients for intensifying productivity of forage grasses. This nutrient promotes a series of physiological changes influencing the nutritional value thereof, and consequently, the rate of capacity and productivity. Humic substances are the main components of organic matter and are responsible for several beneficial effects to the plant, such as increased plant growth and development of the root system and its use can be a pasture recovery strategy. The objective of this study was to evaluate the production, chemical composition and digestibility of Brachiaria brizantha cv. Marandu subjected to nitrogen and humic substances on pasture with early degradation. It was performed of nitrogen test and only substances. The experimental design was a randomized block in a 5x4 experimental arrangement, five doses of nitrogen (0, 50, 100, 200, 400 kg N.ha-1), four doses of humic substances (zero, 12.5, 25 and 50% of the concentrated material) in two sections, with five replications. There was significant effect on nitrogen doses in the production of dry matter, crude protein, silica, neutral detergent fiber (NDF), acid detergent fiber (FDA), and dry matter digestibility in vitro (DVMS). The doses of humic substances did not affect the studied variables