Qualidade da fibra de algodão adensado submetido a sistemas de colheita mecânica
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Data
2015-12-10
Autores
Aguero, Nayra Fernandes
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Universidade Federal de Mato Grosso
Resumo
The cultivation of cotton in the Cerrado, in large areas, was possible by
high investment and technology, particularly in mechanized harvesting, making the
business viable. However, the use of harvester causes qualitative and quantitative
losses of the final product, reducing the profitability of production. Aimed to evaluate
the fiber characteristics of narrow row cotton using crop platforms picker-12 VRS and
stripper. The experiment was conducted in two farms of in the municipalities of
Sorriso and Campo Verde - MT in crop years 2014 and 2015, respectively. The
experimental design was randomized blocks with seven replicates in the first year
and six in the second year. The treatments consisted of five harvesting systems in
Sorriso (2014): picker-12 VRS, finger stripper with HL extractor, finger stripper
without extractor HL, brush stripper with extractor HL and brush stripper without
extractor HL. In the municipality of Campo Verde (2015) were four treatments: picker12 VRS, brush stripper with HL extractor, brush stripper without extractor HL and
manually harvest. The efficiency of the harvester was quantified by determining the
yield and total loss. It was quantified impurities cotton by determining the percentage
of bark and stem present in the sample. The following technological fiber
characteristics were analyzed through the HVI tool: Area - item percentage shot that
is not cotton; UHM - length (mm); SFC - short fiber index (%) Elg - elongation; Mic -
micronaire index; +b - degree of yellowing; Rd - degree of reflection (%); LUI - length
uniformity index (%); STR - strength (gf tex-1
). The results were submitted to analysis
of variance by F test, and when significant, Tukey's test at 5% probability. The cotton
management in dense system has a significantly lower amount of trash when
harvested with the harvester picker-12 VRS. The extractors HL stripper harvesters
brush and comb provide cotton to a lesser lump amount of stem and bark. The
picker-12 VRS VRS harvester failed to show that preserved the intrinsic quality of the
fiber
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AGUERO, Nayra Fernandes. Qualidade da fibra de algodão adensado submetido a sistemas de colheita mecânica. 2015. 53 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2015.