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| Colombo,Alberto; Alvarenga,Lívia A.; Scalco,Myriane S.; Ribeiro,Randal C.; Abreu,Giselle F.. |
| The increasing demand for water resources accentuates the need to reduce water waste through a more appropriate irrigation management. In the particular case of irrigated coffee planting, which in recent years presented growth with the predominance of drip irrigation, the improvement of drip irrigation management techniques is a necessity. The proper management of drip irrigation depends on the knowledge of the spatial pattern of soil moisture distribution inside the wetted strip formed under the irrigation lines. In this study, grids of 24 tensiometers were used to determine the water storage within the wetted strip formed under drippers, with a 3.78 L h-1 discharge, evenly spaced by 0.4 m, subjected to two different management criteria (fixed irrigation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated coffee planting; Tensiometers; Soil water storage. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200004 |
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| Morais,Augusto R. de; Scalco,Myriane S.; Colombo,Alberto; Faria,Manoel A. de; Carvalho,Carlos H. M. de; Paiva,Leandro C.. |
| Este trabalho teve por objetivo avaliar características de plantas de café cultivar Rubi-MG1192 e, através da variabilidade dessas características, estabelecer planos de amostragem para orientar projetos na cultura do café, em desenvolvimento inicial. O experimento está instalado na área experimental do Departamento de Agricultura da Universidade Federal de Lavras, em Lavras, MG. O delineamento experimental foi em blocos casualizados, com quatro repetições, e os tratamentos constam das combinações de densidades de plantio definidas pelos espaçamentos 2500 (4,0 x 1,0 m), 3000 (3,0 x 1,0 m), 5000 (2,0 x 1,0 m), 10000 (2,0 x 0,5 m) e 20000 (1,0 x 0,5 m) e critérios para início das irrigações (-20, -80, -140 e -200 kPa, manejo SISDA 3-5ò e sem irrigação).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diferença mínima significativa; Tamanho de amostra; Precisão experimental; Cafeeiro irrigado. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662005000400011 |
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| Marcon,Marlon; Mariano,Kleber; Braga,Roberto A.; Paglis,Carlos M.; Scalco,Myriane S.; Horgan,Graham W.. |
| One feature of most horticultural crop plants that is biologically relevant to their yield and productivity is total leaf area. However, direct methods of estimation of the leaf area cause damage to the plants, whereas indirect methods such as based on light measurement, demand accuracy in the setup of the measurement procedure, which is specific to each crop. Coffee is one of the most important perennial plants related to worldwide trade, and this demands some ability to estimate the productivity of the crop, as well as all the perennial plants involved in production of agricultural products. This study aims to build a model based on indirect measures to estimate the leaf area in coffee plants using image analysis. Two models were evaluated, one based on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Non-destructive method; Coffee tree; Model. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662011000100014 |
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| Assis,Gleice A. de; Scalco,Myriane S.; Guimarães,Rubens J.; Colombo,Alberto; Dominghetti,Anderson W.; Matos,Nagla M. S. de. |
| Irrigation associated to reduction on planting spaces between rows and between coffee plants has been a featured practice in coffee cultivation. The objective of the present study was to assess, over a period of five consecutive years, influence of different irrigation management regimes and planting densities on growth and bean yield of Coffea arabica L.. The treatments consisted of four irrigation regimes: climatologic water balance, irrigation when the soil water tension reached values close to 20 and 60 kPa; and a control that was not irrigated. The treatments were distributed randomly in five planting densities: 2,500, 3,333, 5,000, 10,000 and 20,000 plants ha-1. A split-plot in randomized block design was used with four replications. Irrigation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Irrigated coffee cropping; Coffea arabica L.; Plant spacing. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001100004 |
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| Ribeiro,Kleber M.; Braga,Roberto A.; Scalco,Myriane S.; Horgan,Graham W.. |
| The total leaf area (TLA) estimation is an important feature of the crops and their assessment a challenge, since the direct methods of obtaining it are destructive and time consuming. Non-destructive methods have been explored to obtain the TLA by indirect approaches, in turn creating other features, as the leaf area index. The development of non-destructive technology to access the TLA of a plant has been the subject of much research, and the optical metrology is an promising approach. In this work, some indirect methods associated with optical approaches were evaluated as an alternative to obtain the TLA of the coffee plant. Commercial equipment were used, such as a camera with a fish eye lens and lux meters, associated to the sizes of the canopies were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Optics; Non-destructive technique; Coffee. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662013000600004 |
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| Dominghetti,Anderson W.; Scalco,Myriane S.; Guimarães,Rubens J.; Silva,Douglas R. G.; Carvalho,João P. S.; Pereira,Vinícius A.. |
| O objetivo deste trabalho foi avaliar, em doses crescentes de fósforo, o efeito de lâminas de irrigação no teor foliar de fósforo de cafeeiros em estágio de primeiro ano de produção. O plantio (Topázio MG-1190) foi realizado em janeiro de 2010 e os tratamentos diferenciados a partir de novembro de 2011. Utilizou-se o delineamento experimental em blocos ao acaso com três repetições, com tratamentos dispostos no esquema fatorial 5 x 4 os quais se compunham por cinco lâminas de irrigação correspondentes às frações (0,4; 0,7; 1,0; 1,3 e 1,6) da lâmina calculada pelo coeficiente de cultura e quatro doses de fósforo (0, 80, 240 e 720 kg ha-1). Foi utilizado o sistema de irrigação por gotejamento enquanto a adubação fosfatada (monoamônio fosfato purificado) foi... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea arabica L.; Adubação fosfatada; Fertirrigação. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001200005 |
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