Desenvolvimento inicial de variedades de cana-de-açúcar em latossolo do cerrado mato-grossense submetidas a níveis de compactação do solo
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Data
2012-03-23
Autores
Fagundes, Eliane Aparecida Antunes
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Universidade Federal de Mato Grosso
Resumo
The replacement of manual harvesting of sugar cane
(Saccharum L.) by mechanized demands researches related to the
development of genotypes that develop and produce well under conditions of
greater soil compaction. Thus, the aim of the present study was to evaluate
the effects of compaction on the initial growth and development of sugarcane
varities with compaction levels in Dystrophic Red cerrado of Mato Grosso.
The experiment was conducted in the experimental area at the Federal
University of Mato Grosso, campus of Rondonópolis, in a greenhouse with a
randomized block design consisting of 3X5 scheme factorial and
corresponding to varieties and compaction levels respectively and four
replicates, from September to december/2012. It was studied the varieties
RB002504, RB867515 and RB931011 into five levels of soil compaction
(1.0, 1.2, 1.4, 1.6 and 1.8 Mg m-3). The variables evaluated were: number of
tillers, number of leaves, leaf area, fresh and dry weight of leaves, length
and diameter of culms, fresh and dry mass of culms, plant height, root fresh
weight, root dry weight, stomatal conductance, chlorophyll content and
comsumption of water. For qualitative variables it was used the Turkey test
for comparison of means and for quantitative variables regression analyzes,
both until 5% probability. The increase of soil density influenced the early
development of the three varieties of sugar cane studied. The variety
RB002504 produces more tillers, leaves and greater leaf area and
highlighting in the density 1.8 Mg m-3 in dry and fresh leaves. The variety
RB867515 features larger diameter, root dry weight and stomatal
conductance and variety RB931011 showed better results in variables: fresh
and dry mass of stems, plant height, length and stalk diameter and
chlorophyll content.
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FAGUNDES, Eliane Aparecida Antunes. Desenvolvimento inicial de variedades de cana-de-açúcar em latossolo do cerrado mato-grossense submetidas a níveis de compactação do solo. 2012. 80 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2012.