Cultivo de arroz de terras altas submetido à adubação silicatada e tensões de água no solo
Data
2014-12-03
Autores
Oliveira, Jakeline Rosa de
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Mato Grosso
Resumo
Rice cultivation of upland in Brazil occurs mainly in the Cerrado area, region
with adverse weather conditions. Therefore the use of silicon in cultivation becomes
important for increasing the crop yield, since it provides regulation of evaporation,
improved leaf architecture and a reduction in disease incidence. Thus aimed to
evaluate the effect of silicon fertilization and soil water tensions in the cultivation of
upland rice in the Cerrado Oxisol. The experiment was conducted in a greenhouse.
The soil was collected from an area of Cerrado vegetation. Was used 5x5 factorial
fractional design with five tensions water in soil (0, 15, 30, 45 and 60 kPa) and silicon
five doses (0, 120, 240, 480 and 960 mg dm-3) which were distributed according to the
statistical design of randomized blocks with four replications. Each experimental plot
consisted of a pot of 8 dm -3 the one tensiometer installed at a depth of 13 cm. The
following characteristics were evaluated: leaf angle, chlorophyll index, plant height,
flowering, number of tillers, number of leaves, number of panicle, panicle length,
number of grains per panicle, percentage of empty grains, grain weight, dry weight of
shoot and root dry mass, concentration and accumulation of silicon. Results were
submitted to statistical analysis using the SAS statistical program. Silicon fertilization
improved architecture of rice plants with reduced leaf angle and increased chlorophyll
content in silicon doses of 785 and 750 mg dm-3, respectively. The 45 kPa water
tension promoted reduction in the aerial part dry weight, dry weight of roots,
concentration and silicon accumulation in upland rice plants. The increase in water
tension in the soil reduced the yield of upland rice grown in culture pot in Cerrado
Oxisol.
Descrição
Palavras-chave
Citação
OLIVEIRA, Jakeline Rosa de. Cultivo de arroz de terras altas submetido à adubação silicatada e tensões de água no solo. 2014. 79 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2014.