Cultura do milho submetida a tensões de água no solo e doses de nitrogênio
Data
2012-12-17
Autores
Schlichting, Alessana Franciele
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Editor
Universidade Federal de Mato Grosso
Resumo
Nitrogen fertilization combined with water availability are the
most important factors for the development of corn, so the objective was to
check the present study the influence of soil water stress and nitrogen
fertilization in maize, in Oxisol. The experiment was conducted in a
greenhouse at the Federal University of Mato Grosso, Campus
Rondonópolis. We used a randomized block design in a factorial 5x5,
corresponding to five soil water stress (15, 25, 35, 45 and 55 kPa) and five
doses of nitrogen (0, 50, 100, 150 and 200 mg dm-3) with four replications,
totaling 25 treatments, a total of 100 plots. The experimental units were
represented by plastic pots of 18 dm3 soil. The corn hybrid used in the
experiment was the DKB 390 PRO, classified as simple hybrid. Harvesting
and evaluations were performed at 122 days after emergence, where the
characteristics evaluated were: plant height, stem diameter, number of
tassel branches, leaf dry weight, stem dry weight, dry weight tassel, dry
shoot, root dry weight, height, first ear, cob with straw, cob without straw,
cob dry weight, ear length and weight of 100 grains. Results were subjected
to analysis of variance and regression testing, being used to this, statistical
programs. In assessments where significant interaction occurred, the
smallest voltages between 15 and 25 kPa, allied fertilizations 100-150 mg
dm-3 nitrogen, provided the best results. The soil water tension of 55 kPa,
was more damaging to the development of corn.
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Citação
SCHLICHTING, Alessana Franciele. Cultura do milho submetida a tensões de água no solo e doses de nitrogênio. 2012. 83 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2012.