Abstract This paper investigates the properties of the polyaniline (PANI) on açaí vegetable fiber (AVF), hereafter referred to as PANI-COATED:AVF. Scanning electron and atomic force microscopy showed that the incorporation of PANI produced a linear surface, while optical microscopy images showed that the semiconductor layer was flawed. The complex impedance measurements performed at room temperature indicated that the electrical properties of PANI were fully transferred to the PANI-COATED:AVF and that the Cole-Cole approach dominated over a frequency range from 1 Hz to 100 kHz. Thermogravimetric analysis revealed a thermal stability range of 0° to 300°C. Finally, the combination of PANI with AVF was a successful due to the ease of processing and obtaining semiconductor filaments with wide ranges of thermal and electrical stability. This article is a complement to another recently published [doi.org/10.1002/pc.27068].

ABSTRACT: The use of plastic mulching and high frequency hydroponic drip irrigation (intensive production methods) watering cycle may increase tabasco pepper crop production per unit area. To test this hypothesis, two randomized block experiments were conducted in a greenhouse, using a 2 × 4 factorial scheme with two contrasting soil types (sandy loam and loamy soil), two mulching conditions of soil cover (SC), and no soil cover (NC) at four frequencies: 1, 3, 12, and 24 irrigations every three days. The growth and yield pepper components were evaluated and the water use efficiency (WUE) was calculated. Mulching did increase fruit dry mass percentage (FDMP), WUE, and potassium use efficiency (KUE) in sandy loam soil. The greater frequency fertigation did not increase fruit fresh mass (FFM), number of fruits (NF), fruit average mass (FAM), fruit dry mass (FDM), FDMP, or WUE in sandy loam and loamy soils. Tabasco pepper has a permanent shrub growth habit that is somewhat different from horticultural crops, besides it is usually responsive to high frequency irrigation under vegetative intensive growth.

Resumo Objetivo comparar atitudes relacionadas à colaboração interprofissional autorrelatadas por diferentes equipes da atenção primária com a realidade observada de seus processos de trabalho. Método abordagem qualitativa e quantitativa implementada em duas etapas de coleta de dados, entre dezembro de 2019 e outubro de 2020. Na qualitativa, empregou-se a observação sistemática dos atendimentos em unidades de saúde. Utilizou-se roteiro de observação baseado no Referencial para Competências em Interprofissionalidade e no Fluxograma Analisador do processo de trabalho centrado no usuário. As observações foram registradas em diário de campo. Na etapa quantitativa, aplicou-se a Escala de Atitudes Relacionadas à Colaboração Interprofissional. Resultados noventa e um profissionais da atenção básica responderam a escala. Obteve-se uma média de 120 de pontuação, que significa valorização do trabalho colaborativo por respondentes de todas as equipes. Apesar disso, foram observadas divergências entre o falado e o vivido, pois o processo de trabalho estruturado parece limitar atitudes colaborativas. Conclusões e implicações para a prática valorização de atividades programadas para o trabalho interprofissional da equipe de saúde e de enfermagem na atenção primária, como espaços na agenda para reuniões. Necessidade de promoção da educação interprofissional com trabalhadores, bem como de políticas públicas que garantam mecanismos para o trabalho colaborativo na atenção básica.

Abstract Objective to compare self-reported interprofessional attitudes according to the teams from different primary health care services with the actual context of work processes. Method Quantitative and qualitative study in which data were collected in two stages between December of 2019 and October of 2020. Systematic observation was the strategy used to collect data from primary health care centers. A script based on the Canadian Interprofessional Health Collaborative framework and the Analyzer Flowchart was used to observe the patient-centered work process. Observations were recorded in a Field Diary, and the Brazilian version of the Jefferson Scale of Attitudes Toward Interprofessional Collaboration was used. Results 91 primary health workers completed the scale. The median score was 120, meaning all the health teams value collaborative work. Nonetheless, differences were found between what the participants say and what they do, considering that the structured work process limits collaborative practice. Conclusions and Implications to Practice the services need to value programmed activities to promote interprofessional collaboration among health and nursing teams working in primary health care, and reserve time, and give opportunities for meetings to occur. Additionally, training addressing interprofessional collaboration needs to be provided to workers in addition to public policies to ensure mechanisms that promote collaborative practices.

Resumen Objetivo comparar las actitudes relacionadas con la colaboración interprofesional autoinformada por diferentes equipos de la atención primaria con la realidad observada en sus procesos de trabajo. Método investigación cualitativa y cuantitativa. La recolección de datos ocurrió entre diciembre de 2019 y octubre de 2020. En la etapa cualitativa se utilizó la observación sistemática de la atención en las unidades de salud, con un guión de observación basado en el Referencial de Competencias Interprofesionales y el Diagrama Analizador del Flujo del proceso de trabajo centrado en el usuario. Registramos las observaciones en el diario de campo. En la etapa cuantitativa se aplicó la Escala de Actitudes Relacionadas con la Colaboración Interprofesional. Resultados 91 profesionales respondieron la escala. Se obtuvo una media de 120 puntos, lo que supone valorización del trabajo colaborativo por profesionales de todos los equipos evaluados. Sin embargo, verificamos diferencias entre lo relatado y lo vivido, ya que el proceso de trabajo estructurado parece limitar las actitudes para el trabajo colaborativo. Conclusiones e implicaciones para la práctica valorización de actividades programadas para el trabajo interprofesional de los equipos de salud y de enfermería, como reuniones programadas. Necesidad de promoción de la educación interprofesional, así como de políticas públicas que garanticen mecanismos de trabajo colaborativo.

Abstract Objective: The association between diabetes and Strongyloides infection remains controversial. This study aimed to detect Strongyloides stercoralis DNA in the feces of patients with Diabetes Mellitus type 2 (DM2). Methods: Fecal samples were analyzed via the Lutz, Rugai, and agar plate culture methods. PCR amplification was performed using two targets (PCR-genus and PCR-species) located on the S. stercoralis 18S ribosomal. Results: The positivity for S. stercoralis using parasitological methods was 1.1%. PCR-genus (14.13%) demonstrated a higher positivity than PCR-species (9.78%). Conclusion: The results confirm the greater positivity of the molecular diagnosis in relation to parasitological methods, reinforcing its use as an additional tool for the diagnosis of S. stercoralis infection in patients with DM2 living in endemic areas for this helminthiasis. HIGHLIGHTS Positivity for strongyloidiasis in coproscopic exam was low in diabetic patients. PCR is more sensitive for detecting S. stercoralis infection in diabetic patients. Molecular diagnosis is an important tool for the detection of S. stercoralis.

Abstract A reconfigurable frequency selective surface, FSS, associating cross dipoles and matryoshka geometries is described in this paper. The proposed reconfigurable FSS uses as active element PIN diodes. With the associated geometries, three resonant frequencies are achieved, two fixed, related to the matryoshka geometry, and one that can be activated or not, related to the cross dipoles geometry. Differently from previous works, an inductor was inserted into the cross dipoles’ horizontal arms, maintaining its resonance for x polarization. The PIN diode inserted into cross dipoles’ vertical arms controls the respective resonance. The design procedures for each geometry, in addition to PIN diode and RF inductor basics are outlined. The expected results are discussed based on the analysis of the resonances of each geometry and the associated geometries, as well as the different PIN diode bias states (OFF and ON). A prototype was fabricated and characterized, obtaining a good agreement between the numerical and experimental results, with a reconfiguration bandwidth of 0.24 GHz, from 2.12 GHz to 2.36 GHz, for a variation of at least 10 dB between the OFF and ON states.

Abstract In reconfigurable frequency selective surface, FSS, bias lines can suppress a resonant frequency. This is a disadvantage, as it reduces a FSS potential application. In this paper, a procedure to recover the suppressed resonant frequency is described. A FSS based on four arms star geometry is considered and its reconfigurability is achieved by the use of varactors, for which bias lines suppress the x polarization resonance. So, dipoles are added to the unit cell geometry recovering this resonance. In order to validate the proposed procedure, a reconfigurable FSS using the varactor SMV1231 (0. 466 pF ≤ Cv < 2. 35 pF) was fabricated and characterized. Numerical and measured results shown a good agreement, confirming that the FSS reconfigurability is preserved and the suppressed resonance recovered.

Resumen Este estudio presenta la asociación de Pachybrachis sp. con un nuevo huésped, Spermacoce verticillata L. (Rubiaceae). En este trabajo se dan a conocer las localidades registradas en Brasil para la especie y los registros de plantas huésped mencionados en la literatura. Se recolectaron especímenes de adultos y larvas sobre el huésped en un área urbana de Maceió, Alagoas, Brasil. Las larvas y los adultos se criaron en la planta huésped en el laboratorio, utilizando tejido vegetal fresco a diario.

Abstract This study reports Pachybrachis sp. association with a new host, Spermacoce verticillata L. (Rubiaceae). It synthesizes Brazil locality records and host plant records from literature. Specimens of adults and larvae were collected on the host in an urban area of Maceió, Alagoas, Brazil. Larvae and adults were reared on the host plant in the laboratory, using fresh plant tissue daily.

RESUMEN Eudaminae Mabille, 1877 (Hesperiidae), reconocida como subfamilia recientemente, es rica en especies en Brasil. A lo largo de la Región Neotropical es donde se encuentra gran parte de la diversidad, sin embargo, información que involucra la biología de las especies es poco conocida todavía. Este trabajo reúne nuevos datos bioecológicos de una especie de Aguna en el municipio de Maceió (Alagoas, Brasil), cerca del Área de Protección Ambiental de "Catolé" y "Fernão Velho", un remanente de Bosque Atlántico. Las hojas que contenían huevos se colectaron en un área periurbana (9° 33’ 26” S, 35° 46’ 36” W) y se llevaron al laboratorio para observar el desarrollo postembrionario. También se colectaron larvas de otra planta huésped en un área intraurbana (9° 39’ 40” S, 35° 41’ 58” W). Los especímenes fueron identificados como Aguna megacles megacles (Mabille, 1888) y las dos Fabaceae como Bauhinia pentandra (Bong.) D. Dietr. y Bauhinia monandra Kurz. desecados depositados en el Herbario. La cría a partir de los huevos colectados en B. pentandra expone un desarrollo post-embrionario de 53.4 días para seis estadios larvales y 46 días para el espécimen de cinco estadios larvales. Las larvas construyeron un refugio desde el primer estadio y en condiciones de laboratorio la pupa prefirió la base de la jaula. Este es el primer informe de características de desarrollo para A. m. megacles, incluye seis y cinco estadios larvales, así como una nueva localidad para el Estado de Alagoas, y dos plantas huésped más de Bauhinia que sugieren un comportamiento especialista.

ABSTRACT Eudaminae Mabille, 1877 (Hesperiidae), recognized as subfamily recently, is rich in Brazil. It is along the Neotropical Region where a significant part of the diversity is found, however, information that involves the biology of species is poorly yet. This paper gathers new bioecological data of an Aguna species from the municipality of Maceió (Alagoas, Brazil), close to the Environmental Protection Area of “Catolé” and “Fernão Velho”, a remnant of Atlantic Forest. Leaves containing eggs were collected in a peri-urban area (9° 33’ 26” S, 35° 46’ 36” W) and taken to laboratory to observe post-embryonic development. Larvae were also collected from another host plant in an intra-urban area (9° 39’ 40” S, 35° 41’ 58” W). The specimens were identified as Aguna megacles megacles (Mabille, 1888) and the two Fabaceae as Bauhinia pentandra (Bong.) D. Dietr. and Bauhinia monandra Kurz. from exsiccates deposited at the Herbarium. Rearing from the eggs collected on B. pentandra exposes a post-embryonic development that lasted 53.4 days for six larval instars individuals, and 46 days for the five larval instars specimen. The larvae built a shelter since the first instar and in laboratory conditions they preferred pupate on the base of the cage. This is the first report of development features for A. m. megacles, including six and five larval instars, as well as a new locality for the State of Alagoas, and two more host plants of Bauhinia suggesting specialist behavior.

Abstract The Bacanga River Estuary is socioeconomically important due to artisanal fishing and aquaculture. It is blocked by a dam and is under human pressure along its drainage basin, intensifying the eutrophication process. This study reports on the occurrence of phytoplankton blooms and trophic state (TSI and TRIX) at six sampling sites during the annual cycle. The estuary was divided into downstream and upstream regions. Higher salinity, turbidity, depth, and lower dissolved oxygen levels were found downstream; whereas, high levels of chlorophyll a and nutrient concentrations were observed in both regions. There were blooms of Leptocylindrus danicus (1.45 × 106 cells L-1) and Skeletonema costatum (1.89 × 106 cells L-1) downstream; whereas phytoflagellate proliferation, such as those of Chlamydomonas sp. (13.17 × 106 cells L-1), Euglena gracilis (7.84 × 106 cells L-1), and Euglena proxima (1.03 × 106 cells L-1) were recorded upstream, with Chlamydomonas sp. as the discriminant species of this zone. Both trophic indices (TSI; TRIX) indicated elevated trophic conditions for the estuary, classifying it as hypereutrophic. Nevertheless, TSI only showed a significant relationship with some specific phytoplankton blooms. Thus, TSI seems to be the trophic index with a better response in the assessment of estuarine ecological functioning.

Resumo: O objetivo deste trabalho foi avaliar o desempenho dos agrominerais termopotássio e termofosfato, como fontes de P e K, em consórcio de pastagem orgânica de Urochloa brizantha 'Marandu' + Stylosanthes spp. no Cerrado brasileiro. O manejo orgânico foi comparado ao convencional com uso de fertilizantes químicos, durante três anos, em dois experimentos adjacentes, um com e outro sem cultivo prévio de adubo verde (Crotalaria juncea). Os tratamentos de manejo foram: convencional, com aplicação de 200 kg ha-1 de cloreto de potássio, 260 kg ha-1 de superfosfato triplo e 217 kg ha-1 de ureia; orgânico, com aplicação de 1,0 Mg ha-1 termopotássio, 2,0 Mg ha-1 termofosfato e 7,0 Mg ha-1 cama de frango; e controle, sem adubação. Foram avaliadas fertilidade do solo, produção de matéria seca e contribuição da leguminosa na pastagem. O experimento com adubação verde proporcionou aumento significativo nos teores de P e K extraíveis do solo e na produtividade da pastagem. No tratamento orgânico, devido à liberação lenta dos nutrientes dos agrominerais, são observados efeitos de longo prazo nos teores extraíveis de P e K do solo.

Abstract: The objective of this work was to evaluate the performance of the thermopotassium and thermophosphate agrominerals, as sources of P and K, in an organic pasture consortium of 'Marandu' Urochloa brizantha + Stylosanthes spp. in the Brazilian Cerrado. The organic management was compared with conventional farming using chemical fertilizers, during three years, in two adjacent experiments, one with and the other without previous growth of green manure (Crotalaria juncea). The management treatments were: conventional, with the application of 200 kg ha-1 potassium chloride, 260 kg ha-1 triple superphosphate, and 217 kg ha-1 urea; organic, with the application of 1.0 Mg ha-1 thermophosphate, 2.0 Mg ha-1 termopotassium, and 7.0 Mg ha-1 chicken manure; and control, without fertilizers. Soil fertility, dry mass production, and legume content in the pasture were evaluated. The experiment with green manure resulted in a significant increase in the soil-extractable contents of P and K and in pasture productivity. In the organic treatment, due to the slow release of agromineral nutrients, long-term effects are observed on the soil-extractable contents of P and K.

Resumo Os objetivos deste estudo foram avaliar as propriedades físicas e químicas, citototoxidade e penetração tubular de uma nova medicação à base de silicato de cálcio. Para o teste de pH, e liberação de íons cálcio (1, 24, 72 e 168 h) foi usado medidor de pH e espectofotômetro colorimétrico, respectivamente. Avaliação da radiopacidade, seguiu a ISO 6876:2012). A citotoxicidade foi avaliada pela porcentagem de células viáveis usando o ensaio MTT. Imagens ilustrativas de penetração tubular foram obtidas usando microscopia confocal de varredura a laser (CLSM). Os dados de pH e liberação de cálcio foram analisados através do teste de Análise de Variância de duas vias e teste de Tukey. A radiopacidade foi avaliada usando o teste T de Student. Para a citotoxicidade foi empregada a Análise de Variância de uma via e teste de Tukey. Ambos os materiais apresentaram pH alcalino em todos os tempos experimentais. Os valores de pH da pasta de hidróxido de cálcio foram superiores à pasta biocerâmica em 1, 24 e 72 h (p<0,05). A liberação de cálcio da pasta biocerâmica foi inferior à pasta de hidróxido de cálcio apenas em 24 h (p<0,05). Bio-C Temp foi mais radiopaco que o Ultracal XS (p<0,05). A pasta biocerâmica apresentou efeito citotóxico dependente da dose e do tempo de exposição. Imagens de CLSM mostraram ausência de penetração intratubular para ambas as pastas. A nova medicação à base de silicato de cálcio apresentou pH alcalino, alta liberação de cálcio e boa radiopacidade. Bio C Temp apresentou um efeito citotóxico dependente da dose e do tempo de exposição e ausência de penetração tubular.

Abstract The aims of this study were to evaluate the physical and chemical properties, cytotoxicity and dentinal tubule penetration of a new calcium silicate-based root canal dressing. For pH and calcium ion release evaluation (1, 24, 72 and 168 h) were used a pH meter and colorimetric spectrophotometer, respectively. Radiopacity evaluation followed the ISO 6876:2012. Cytotoxicity was evaluated by the percentage of cell viability using MTT assay. Illustrative images of dentinal tubule penetration were obtained using confocal laser scanning microscopy (CLSM). Data from pH and calcium ion release were statistically analyzed by two-way analysis of variance and Tukey test. Radiopacity was analyzed using the Student t-test. The statistical tests for cytotoxicity results were the one-way analysis of variance and Tukey test. Both materials showed alkaline pH in all experimental times. The pH values for calcium hydroxide paste were higher than bioceramic paste at 1, 24, and 72 h (p<0.05). The calcium ion release of bioceramic was lower than the calcium hydroxide paste only at 24 h (p<0.05). The bioceramic was more radiopaque than the calcium hydroxide paste (p<0.05). Bioceramic paste presented a dose and time-dependent cytotoxic effect after MTT assay. CLSM images showed absence of tubule penetration for both pastes. The new calcium silicate-based canal dressing presented alkaline pH, high calcium release, and acceptable radiopacity. Bio C Temp showed a dose and time-dependent cytotoxic and absence of dentinal tubule penetration.

Resumo O estudo buscou analisar e estudar a prevalência e as circunstâncias de urgências e emergências oftalmológicas no Pronto Socorro do Hospital de Clínicas de Uberlândia da Universidade Federal de Uberlândia (HCU-UFU) e no Ambulatório Amélio Marques no período de agosto de 2016 a agosto de 2017. Faz-se necessário tal estudo, pois emergências oftalmológicas são importantes causas de morbidades na sociedade(1). Ademais, através dele políticas de prevenção poderão ser feitas, além de maior capacitação de profissionais a partir do conhecimento das principais causas de atendimento. A metodologia proposta incluiu a coleta de dados do prontuário, sendo colhidas as informações sexo, idade e ocupação/profissão. Trata-se de um estudo epidemiológico exploratório observacional predominantemente descritivo do tipo transversal. O trabalho evidenciou que o sexo masculino foi o mais acometido e a faixa etária mais incidente foi entre 19 e 45 anos. Das causas de procura pelo pronto-atendimento oftalmológico, o trauma ocular por corpo estranho é a mais comum havendo uma estreita relação com as atividades laborais (mecânicos e ferragistas). Dessa forma, os dados serão um recurso importante para o auxiliar na compreensão do perfil epidemiológico do pronto-atendimento oftalmológico visando otimizar a administração do mesmo e para estimular a adoção de políticas públicas de prevenção no âmbito da saúde do trabalhador.

Abstract The study aimed to analyze and study the prevalence and circumstances of ophthalmic emergencies and urgencies in the Emergency Room of the Hospital de Clínicas de Uberlândia and the Central Ambulatory (Amélio Marques) of the Federal University of Uberlândia (HCU-UFU) from August 2016 to August 2017. This is a necessary study since ophthalmic emergencies are important causes of morbidities in society(1). In addition, this study will help to develop prevention policies and to make greater training of professionals based on knowledge of the main causes of eye emergencies. The proposed methodology included the collection of data from the medical record, with the information of sex, age and occupation/profession being collected. This is an observational, descriptive, transversal, exploratory epidemiological study. The study showed that males were the most affected and the most incident age group was between 19 and 45 years old. Eye trauma due to a foreign body is the most common cause of demand for ophthalmologic emergency care with a close relationship with work activities (mechanics and ironmongers). In this way, the data will be an important resource to assist in understanding the epidemiological profile of the ophthalmology emergency room in order to optimize its administration and to encourage the adoption of public prevention policies within the scope of occupational health.

RESUMO No estado do Mato Grosso, a cultura do trigo surge como alternativa ao sistema produtivo atual, principalmente em cultivos irrigados, com novas cultivares melhoradas para este ambiente e sistema. Objetivou-se determinar a evapotranspiração da cultura (ETc) do trigo irrigado e os coeficientes duplos de cultivo de cultivares para o Centro-Oeste brasileiro. O experimento foi realizado no campo utilizando 12 lisímetros e minilisímetros de pesagem, preenchidos por monólitos de solo. Foram utilizadas as cultivares de trigo BRS-254 e BRS-394 no primeiro e segundo ano, respectivamente. A evapotranspiração de referência (ETo) foi obtida pela equação de Penman-Monteith e da cultura por diferença de massa nos lisímetros utilizados para determinar o coeficiente de evaporação de água do solo. Foram determinados os coeficientes basais de cultivo e de evaporação de água do solo conforme os estádios de desenvolvimento da cultura nos dois anos de cultivo. Os valores médios de ETc e ETo foram de 3,87, 3,49 mm d-1 e de 4,10 e 3,23 mm d-1, respectivamente, no primeiro e no segundo ciclos de cultivo, com maiores valores de ETc registrados nas fases reprodutivas da cultura, florescimento e enchimento de grãos. Os coeficientes basais de cultivo e os coeficientes de evaporação de água do solo estimados por lisímetros de pesagem preenchidos por monólitos de solo são: Kcb - 0,42, 0,78, 0,94, 0,74 e 0,47 e Ke - 0,72, 0,52, 0,39, 0,58 e 0,13 para a cultivar BRS-254, e Kcb - 0,28, 0,27, 0,65, 0,98 e 0,66 e Ke - 1,04, 0,96, 0,65, 0,34 e 0,51 para a cultivar BRS-394, nos estádios de emergência, perfilhamento, florescimento, maturação e colheita, respectivamente.

ABSTRACT In the state of Mato Grosso, Brazil, wheat is an alternative to the current production system, mainly in irrigated crops, with new cultivars improved for this environment and system. The objective was to determine the evapotranspiration of the irrigated wheat crop and the dual coefficients of cultivars for the Brazilian Midwest. The experiment was conducted in the field using 12 weighing lysimeters and mini-lysimeters, filled by soil monoliths. The wheat cultivars BRS-254 and BRS-394 were used in the first and second years, respectively. Reference evapotranspiration was obtained by the Penman-Monteith equation and crop evapotranspiration by the mass difference in the lysimeters. Basal crop coefficient and soil water evaporation coefficient were determined according to the crop development stages in both years of cultivation. The mean ETc and ETo values were 3.87, 3.49 mm d-1 and 4.10 and 3.23 mm d-1, respectively, in the first and second cultivation cycles, with higher values of ETc recorded in the reproductive stages of the crop, flowering and grain filling. The basal crop coefficients and soil water evaporation coefficients estimated by weighing lysimeters composed of soil monoliths are: Kcb - 0.42, 0.78, 0.94, 0.74 and 0.47 and Ke - 0.72, 0.52, 0.39, 0.58 and 0.13 for the cultivar BRS-254, and Kcb - 0.28, 0.27, 0.65, 0.98 and 0.66 and Ke - 1.04, 0.96, 0.65, 0.34 and 0.51 for the cultivar BRS-394, at the stages of emergence, tillering, flowering, maturation and harvest, respectively.

ABSTRACT: Awareness of evapotranspiration (ET) and crop coefficient (Kc) is necessary for irrigation management in coffee crops. ET and Kc spatial variabilities are disregarded in traditional methods. Methods based on radiometric measurements have potential to obtain these spatialized variables. The Kc curve and spatial variability of actual evapotranspiration (ETa) were determined using images from Landsat 8 satellite. We used images of young and adult coffee plantations from OLI (Operational Land Imager) and TIRS (Thermal Infrared Sensor) sensors over a two-year period. Evapotranspiration was estimated using the Surface Energy Balance Algorithm for Land (SEBAL). Moreover, the reference evapotranspiration (ETo) was estimated through the Penman-Monteith method. We obtained the values for the evapotranspiration fraction (ETf), analogous to Kc, according to ET and ETo values. The study was conducted in Buritis, Minas Gerais State, Brazil, in areas cropped with Coffea arabica irrigated by central pivots. A comparative analysis was made using different statistical indices. Average ETa was 2.17 mm d−1 for young coffee plantations, , and the Kc mean value was 0.6. For adult coffee plantations, average ETa was 3.95 mm d−1, , and the K mean value was 0.85. The ET and K data obtained based on the SEBAL algorithm displayed similar values to studies that used traditional methods. This model has huge potential to estimate ET of different stages of coffee plantation for the region studied.

ABSTRACT. The leaf area index (LAI) is relevant in studies of phenomena at different scales, such as for the leaf to canopy scale and the calculation of the extinction coefficient of photosynthetically active radiation (kPAR), providing input for the parameterization of physiological basis models. The objective of this work was to verify the variation of the LAI and the coffee kPAR subjected to different drip irrigation levels (130, 100, 70, and 40%) and to compare the data obtained from radiation bar linear sensors (SunScan) in the plants that received full irrigation with the values found by other LAI estimation methodologies. The study was conducted in Piracicaba, São Paulo State, Brazil, using the species Coffea arabica cv. Red Catuaí IAC 144; a drip irrigation system was adopted, with the irrigation controlled by tensiometry. The mean LAI values were higher in the L130 (irrigation level of 130%) and L100 (irrigation level of 100%) treatments than those with deficit irrigation depths. The mean kPAR values were lower for the L130 and L100 treatments than the values found in the deficit irrigation depth treatments. When comparing SunScan to other methodologies, the mean error (ME) and absolute mean error (AME) were high.