Assistência de ar e angulação da barra pulverizadora na deposição e perdas da pulverização na cultura da batata
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Data
2005-03-04
Autores
Scudeler, Fábio [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
A cultura da batata possui grande expressão econômica dentro do cenário agrícola. Para issso, equipamentos e técnicas de aplicação de produtos fitossanitários vêm sendo desenvolvidos visando melhorar o rendimento econômico da cultura. Neste sentido, experimentos foram conduzidos na cultura da batata (cv Àgata) objetivando avaliar a deposição da pulverização e ângulos por meio de um traçador cúprico, bem como as perdas da calda para o solo. Utilizou-se o pulverizador Advance Votrtex 2000 com presença e ausência de ar junto a barra de pulverização e ângulos de aplicação de +30 graus, O graus e -30 graus (sinal + a favor e -contrário ao deslocamento) totalizando seis tratamentos. As diferentes combinações envolvendo assistência de ar e ângulo da barra foram analizadas por meio da aplicação de 400 L ha-1 de calda utilizando pontas de jato Cônico vazio JA-4 a 633 kPa de pressão. Para avaliacção dos depósitos do ion cobre foi desenvolvido um instrumento metálico de amostragem simultânea das superfícies adaxial e abaxial dos folíolos. Os depósitos foram removidos por água de lavagem e quantificados por espectrofotometria de absorção atômica, em ambas as superficies foliares, nas posições superior e inferior das plantas de batata. As perdas da pulverização foram avaliadas em coletores plásticos colocados nas entrelinhas das percelas experimentais. Os níveos dos depósitos do traçador cúprico nas difrentes posições da planta foram analisados pelo teste estatístico T2 de Hotteling. Os maiores depósitos foram constatados cm a barra pulverizadora posicionada a 0 graus e +30 graus , em presença da assintencia de ar, tanto na posição superior quanto na inferior da planta. A presença do ar , além de propiciar maiores depósitos na parte inferior da plantas possibilitou maior uniformidade na distribuição dos depósitos. As perdas da pulverização para o solo ficaram abaixo de 4%.
Within the Brazilian agricultural scene, the potato crop plays a significant economic role. Modern equipment and the development of improved chemical product application techniques contribute to the constant search for a improved revenue from de potato crop. Experiments were carried out on a potato crop of the Agata variety. The aim was to evaluate spray deposition whit a cupric tracer using air assistance and also the spray loss on the soil. An Advance Vortex 2000 sprayer was used both with and without boom air assistance at different angles of application. The boom angles at 0°, +30° and -30° were directioned in a vertical position as well as forwards and back forwards in accordance with displacement. Six combinations treatments were used in a experiment. The trials were sprayed at 400 L ha-1 volume rate using hollow cone nozzles JA-4 at 633 kPa. An instrument, which simultaneously took samples of both the underside and upperside of leaflets, was developed in order to evaluate the tracer deposits. The deposits on both surfaces at upper and lower leaflet were removed by washing with water and quantified by spectrophotometry of atomic absorption. To measure spray loss, plastic measuring collectors were placed between rows. The cupper tracer deposit levels in different positions of the plant were analysed by Tø Hotteling statistic test. Larger deposits were detected in both upper and lower plant positions 4 when the spray boom was positioned at 0º and +30º with the presence of air assistance. The presence of air, as well as having the effect of increasing spray deposits in the lower regions of the plant, helped bring about greater uniformity in the distribution of it. The spray loss was bellow 4%.
Within the Brazilian agricultural scene, the potato crop plays a significant economic role. Modern equipment and the development of improved chemical product application techniques contribute to the constant search for a improved revenue from de potato crop. Experiments were carried out on a potato crop of the Agata variety. The aim was to evaluate spray deposition whit a cupric tracer using air assistance and also the spray loss on the soil. An Advance Vortex 2000 sprayer was used both with and without boom air assistance at different angles of application. The boom angles at 0°, +30° and -30° were directioned in a vertical position as well as forwards and back forwards in accordance with displacement. Six combinations treatments were used in a experiment. The trials were sprayed at 400 L ha-1 volume rate using hollow cone nozzles JA-4 at 633 kPa. An instrument, which simultaneously took samples of both the underside and upperside of leaflets, was developed in order to evaluate the tracer deposits. The deposits on both surfaces at upper and lower leaflet were removed by washing with water and quantified by spectrophotometry of atomic absorption. To measure spray loss, plastic measuring collectors were placed between rows. The cupper tracer deposit levels in different positions of the plant were analysed by Tø Hotteling statistic test. Larger deposits were detected in both upper and lower plant positions 4 when the spray boom was positioned at 0º and +30º with the presence of air assistance. The presence of air, as well as having the effect of increasing spray deposits in the lower regions of the plant, helped bring about greater uniformity in the distribution of it. The spray loss was bellow 4%.
Descrição
Palavras-chave
Batata - Cultivo, Pulverização, Solanum tuberosum, Application technology, Sleev boom sprayer, Spray
Como citar
SCUDELER, Fábio. Assistência de ar e angulação da barra pulverizadora na deposição e perdas da pulverização na cultura da batata. 2005. v, 53 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas, 2005.