Eficiência da colheita mecanizada do algodão em diferentes épocas e aplicação de desfolhantes

• Ano de defesa: 2014
• Autor(a) principal: Bassini, Renato Tillmann
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Mato Grosso; Brasil; Instituto de Ciências Agrárias e Tecnológicas (ICAT) – Rondonópolis; UFMT CUR - Rondonopólis; Programa de Pós-Graduação em Engenharia Agrícola
• Palavras-chave em Português: Algodão; Colheita; Umidade; Perdas; CNPQ::CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA; Cotton; Harvesting; Humidity; Loss
• Link de acesso: http://ri.ufmt.br/handle/1/1090

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.