Milho safra submetido à inoculação com bactérias diazotróficas associativas e doses de nitrogênio

• Autor(a) principal: Moreira, Julio Cezar Fornazier
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFMT
• Texto Completo: http://ri.ufmt.br/handle/1/1098
• topic: Adubação nitrogenada; Fixação biológica de nitrogênio; Zea mays L.; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA; Nitrogen fertilization; Biological nitrogen fixation; Zea mays L.

The diazotrophic bacteria is an important alternative nitrogen supply cultures. The aim of this study was to evaluate the effects of inoculation and nitrogen rates in the development, nutrition and production of the corn crop, grown in Mato Grosso. The experimental design was a randomized complete block with four replications and treatments arranged in a 4 x 3 factorial. The treatments consisted of inoculation of seeds (control, strain MTAz8, strain of MTh2 and commercial inoculant) and nitrogen rates (0, 55, and 110 kg ha-1). Inoculants were produced applied by pelleting the seeds, except the commercial inoculant was applied according manufacturer recommendations. Nitrogen rates was split in two applications of coverage. The relative leaf chlorophyll content, nitrogen content and dry mass of shoots, ear and plant height and stem diameter were evaluated during in three stages the maize cycle. After harvest, the components of grain yield, nitrogen contend and crude protein grains. There was significant interaction only for the production of dry mass of shoots. However, all parameters were influenced by nitrogen fertilization, except for stem diameter and 1000 grain weight. Inoculation associated nitrogen rates in coverage provided the highest average when seeds were not inoculated. Concluded that inoculation with diazotrophic bacteria provides yield effects and nitrogen fertilization promotes increases in development, nutrition and yield of corn grown in Mato Grosso, in the first growing season.