Milho safra submetido à inoculação com bactérias diazotróficas associativas e doses de nitrogênio
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Data
2014-12-05
Autores
Moreira, Julio Cezar Fornazier
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Universidade Federal de Mato Grosso
Resumo
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.
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MOREIRA, Julio Cezar Fornazier. Milho safra submetido à inoculação com bactérias diazotróficas associativas e doses de nitrogênio. 2014. 64 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2014.