Desempenho técnico e econômico da cultura do milho e da pastagem de capim marandu após o consórcio em função da inoculação com Azospirillum brasilense

• Ano de defesa: 2017
• Autor(a) principal: Modesto, Viviane Cristina [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Zea mays L. Urochloa brizantha; Bactérias promotoras de crescimento; Sistemas integrados; Composição bromatológica; Atributos do solo; Growth promoting bacteria; Integrated systems; Bromatological composition; Soil fertility
• Link de acesso: http://hdl.handle.net/11449/152235

The use of plant growth promoting bacteria (BPCV), with nitrogen fertilization in Crop - Livestock Systems (CL I), have provided satisfactory results in the Brazilian Cerrado. Thus, the objective of this study was to evaluate the effect of BPCV inoculation on maize and palisade grass seeds ( Urochloa brizantha cv Marandu) on the growth, yield components and dry matt er and grain productivity in a Oxysoil cultivated under CLI system and no - tillage system in irrigated and dry land in the Cerrado o f low altitude. The experiment was a complete randomized block , with four replications. T reatments were composed of maize cul tivated exclusively or intercropped with the palisade grass, inoculated with Azospirillum brasilense on maize and / or grass seeds; Were carried out during the conduction of the experiments, at the end of each productive cycle , during the 2014/15, 2015/16 agricultural years, the production and productivity components of maize, maize straw and biomass of palisade grass, produc tive performance of forage and i t ́ s nutritive value due to the application or not of nitrogen fertilization or application by leaf or not of the inoculant, at each cut, from autumn to spring, evaluation of the physicochemical properties, besides the economic performance of the CLI under no - tillage system, aimin g to verify the sustainability a nd profitability in management. In irrigated a reas, the intercropping inoculated with A. brasilense on corn seed increased nutrient accumulation, grain yield and straw yield for continuity of CLI. In rainfed area, regardless of not intercropping or intercropping with palisade grass, inoculation of cor n by A. brasilense promoted greater accumulation of nutrients, grain yield and straw. Irrigated or rainfed yields were similar when fertilized with 50 kg ha - 1 of N or inoculated with A. brasilense by foliar spraying, and with no alteration in the bromatolo gical composition. The maize + palisade grass intercropping , in both areas regardless of inoculation, maintained or improved the physical - chemical quality of the soil after two years of intercropping . The systems are economically viable, either in irrigate d or rainfed agriculture.