Deposição da calda de pulverização em diferentes volumes vegetativos de Coffea arabica L.
Data
2017-01
Título da Revista
ISSN da Revista
Título de Volume
Editor
Editora UFLA
Resumo
A disposição dos ramos e sobreposição das folhas em plantas de café dificulta a penetração da calda pulverizada. Portanto, para determinar o volume de calda adequado, é importante verificar o estado de enfolhamento da lavoura antes da aplicação. Objetivou-se com este trabalho, avaliar a deposição de caldas de pulverização em lavouras de café aplicadas em diferentes volumes vegetativos. Os tratamentos foram dispostos seguindo esquema de parcelas subdivididas em cada volume vegetativo (5.000; 7.500; 10.000 e 17.500 m 3 ha -1 ). Sendo as parcelas cinco volumes de calda (150, 300, 450, 600 e 750 L ha -1 ) e as subparcelas três posições no dossel do cafeeiro (terço superior, médio e inferior) com quatro repetições. Nos quatro volumes vegetativos estudados, não ocorreu interação significativa (p>0,05) entre o volume aplicado e os diferentes volumes vegetativos. Porém, os volumes vegetativos de 5.000,0 e 17.500,0 m 3 ha -1 a deposição foi crescente com aumento das vazões, o que pode ser atribuído à densidade foliar. Não foi verificada diferença estatística (p> 0,05), entre as médias de deposição nos diferentes terços (alturas) no dossel das plantas de café, nos volumes vegetativos 5.000,0 m 3 ha -1 , 10.000,0 m 3 ha -1 e 17.500,0 m 3 ha -1 . Contudo, no volume de 7.500,0 m 3 ha -1 houve maior deposição no terço mediano em relação ao terço inferior. A deposição é maior à medida que aumenta o volume de calda aplicado. Em plantas com menor densidade foliar, há incremento na deposição. A deposição é maior no terço mediano em relação ao terço inferior.
The arrangement of branches and leaves overlap in coffee plants hinder the penetration of sprayed mixture. Therefore, to determine the volume of appropriate syrup, it is important to check the condition of the crop leafiness before application. The objective of this study was to evaluate the deposition of spraying of pesticides in coffee plantations applied on different vegetative volumes. The treatments were arranged following split plot in each growing volume (5,000; 7,500; 10,000 and 17,500 m3 ha -1 ). And five volumes of syrup portions (150, 300, 450, 600 and 750 L ha -1 ) and the subplots three positions in the coffee canopy (upper, middle and lower) with four replicates. In the four volumes vegetative studied no significant interaction (p > 0.05) between the applied volume and the different vegetative volumes. However, the vegetative volume of 5000.0 and 17500.0 m3 h -1 depositions was increased with increasing flow, which can be assigned the foliar density. There was no statistical difference (p> 0.05) between the means of deposition in different thirds (heights) in the coffee plants canopy in vegetative volumes 5000.0 m3 ha -1 , 10000.0 m3 ha -1 and 17500.0 m3 h -1 . However, the volume of 7500.0 m3 ha -1 showed higher deposition in the middle third from the bottom third. The deposition is higher as it increases the volume of applied syrup. In plants with reduced leaf density, there is an increase in the deposition. The deposition is largest in the middle third relative to the lower third.
The arrangement of branches and leaves overlap in coffee plants hinder the penetration of sprayed mixture. Therefore, to determine the volume of appropriate syrup, it is important to check the condition of the crop leafiness before application. The objective of this study was to evaluate the deposition of spraying of pesticides in coffee plantations applied on different vegetative volumes. The treatments were arranged following split plot in each growing volume (5,000; 7,500; 10,000 and 17,500 m3 ha -1 ). And five volumes of syrup portions (150, 300, 450, 600 and 750 L ha -1 ) and the subplots three positions in the coffee canopy (upper, middle and lower) with four replicates. In the four volumes vegetative studied no significant interaction (p > 0.05) between the applied volume and the different vegetative volumes. However, the vegetative volume of 5000.0 and 17500.0 m3 h -1 depositions was increased with increasing flow, which can be assigned the foliar density. There was no statistical difference (p> 0.05) between the means of deposition in different thirds (heights) in the coffee plants canopy in vegetative volumes 5000.0 m3 ha -1 , 10000.0 m3 ha -1 and 17500.0 m3 h -1 . However, the volume of 7500.0 m3 ha -1 showed higher deposition in the middle third from the bottom third. The deposition is higher as it increases the volume of applied syrup. In plants with reduced leaf density, there is an increase in the deposition. The deposition is largest in the middle third relative to the lower third.
Descrição
Palavras-chave
Tecnologia de aplicação, Área foliar
Citação
SANTINATO, F. et al. Deposição da calda de pulverização em diferentes volumes vegetativos de Coffea arabica L.. Coffee Science, Lavras, v. 12, n. 1, p. 69-73, jan./mar. 2017.