Eficiência da colheita mecanizada do algodão em diferentes épocas e aplicação de desfolhantes
Data
2014-11-28
Autores
Bassini, Renato Tillmann
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Universidade Federal de Mato Grosso
Resumo
Losses are influenced by several factors, among which stand
out the plant height, harvest speed, adjustment of harvester amount of plants
and bolls per square meter, number of open bolls, humidity during harvest
and other factors, which which contribute to losses in the order of 6% to 12%.
The objective of this study was to evaluate the efficiency of mechanical
harvesting at different times of application of defoliants in the culture of
conventional cotton variety FM 975 WS. Was used to harvest the harvester
John Deere brand, model 7660 (PRO 16). The experiments were performed
on the CÉU AZUL farm, located in Pedra Preta, state of Mato Grosso, during
the agricultural year 2012/2013. Two distinct experimental design were
determined, the first one, was realized the application of defoliant with 80% of
the apples open, we used the randomized complete block design with a 2x3
layout and the second one, with the application of defoliant with 90% of the
open apples, we used the randomized complete block design with a range
3x3 layout . Results were subjected to analysis of variance at 5% probability
by statistical program ASSISTAT and compare using the confidence interval
of the mean of 95% (α = 0.05). The evaluations were conducted in
experimental plots of 5m, which was quantified, temperature, relative
humidity, moisture cotton, total plant height, height of the first boll, number of
plants per square meter and the number of bolls per plant, and determining
percentage of total production, the losses on the ground pre-harvest losses in
post-harvest ground, air post-harvest losses and losses in post-harvest
ground. Cotton Moisture, total plant height, the number of days elapsed after
the application of defoliant have demonstrated influences on losses in
combine harvesting.
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Citação
BASSINI, Renato Tillmann. Eficiência da colheita mecanizada do algodão em diferentes épocas e aplicação de desfolhantes. 2014. 52 f. Dissertação (Mestrado em Engenharia Agrícola) - Universidade Federal de Mato Grosso, Instituto de Ciências Agrárias e Tecnológicas, Rondonópolis, 2014.