Produtividade e composição química de pastagem de Tifton 85 inoculada com Azospirillum brasilense associada à fertilização nitrogenada

• Ano de defesa: 2019
• Autor(a) principal: Silva, Aline Rodrigues
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Zootecnia; UFSM; Programa de Pós-Graduação em Zootecnia; Centro de Ciências Rurais
• Palavras-chave em Português: Cynodon spp; Fibra em detergente neutro; Nutrientes digestíveis totais; Produção de forragem; Proteína bruta; Crude protein; Diazotrophic bacteria; Herbage yield; Neutral detergent fiber; Total digestible nutrients; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA
• Link de acesso: http://repositorio.ufsm.br/handle/1/18609

Tifton 85 bermudagrass have been widely used in tropical and subtropical regions. Due to its high forage yield, the fertility requirement of Tifton 85 is also high. The inoculation with Azospirillum brasilense is an alternative to reduce nitrogen fertilizers and costs, consequently. However, the effects of inoculation in tropical grasses are still little knew. The aim of this study was to evaluate the productivity, pasture characteristics and chemical composition of Tifton 85 bermudagrass, inoculated with Azospirillum brasilense and associated to nitogen fertilizer. The study evaluated four nitrogen levels (0, 100, 200 and 300 kg ha-1), inoculated or not, under cutting conditions. The experimental design was completely randomized, in a factorial arrangement, with two qualitative levels (inoculated with Azospirillum brasilense or uninoculated) and four quantitative (nitrogen doses), with three replications (plots). Botanical and morphological composition, leaf/steam ratio, chemical composition and forage yield were evaluated. Inoculation raised the herbage yield in all pastures, but did not affect the chemical composition of forage. Increasing nitrogen fertilizers is associated with herbage yield and crude protein concentration. Neutral detergent fibers and total digestible nutrients were not affected by inoculation or nitrogen fertilization.