Variação espaço-temporal do índice de área foliar e brix em cana-de-açúcar

Scarpari, Maximiliano Salles; Beauclair, Edgar Gomes Ferreira de

doi:10.1590/s0006-87052008000100004

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…The intercepted light fraction is determined by the Leaf Area Index (LAI = leaf area/ soil area) (Watson 1947), which varies significantly in each sugarcane development stage (Almeida et al 2008), especially due to accumulated degreedays (Teruel et al 1997). Moreover, there is spatial and environmental variation in growth (Scarpari & Beauclair 2008). Taking into account the importance of leaf area in monitoring agricultural crops, such as sugarcane 1.…”

Section: Introductionmentioning

confidence: 99%

Sugarcane leaf area estimate obtained from the corrected Normalized Difference Vegetation Index (NDVI)

Pereira

Casaroli

Vellame

et al. 2016

Pesqui. Agropecu. Trop.

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Large farmland areas and the knowledge on the interaction between solar radiation and vegetation canopies have increased the use of data from orbital remote sensors in sugarcane monitoring. However, the constituents of the atmosphere affect the reflectance values obtained by imaging sensors. This study aimed at improving a sugarcane Leaf Area Index (LAI) estimation model, concerning the Normalized Difference Vegetation Index (NDVI) subjected to atmospheric correction. The model generated by the NDVI with atmospheric correction showed the best results (R2 = 0.84; d = 0.95; MAE = 0.44; RMSE = 0.55), in relation to the other models compared. LAI estimation with this model, during the sugarcane plant cycle, reached a maximum of 4.8 at the vegetative growth phase and 2.3 at the end of the maturation phase. Thus, the use of atmospheric correction to estimate the sugarcane LAI is recommended, since this procedure increases the correlations between the LAI estimated by image and by plant parameters.

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Section: Introductionmentioning

confidence: 99%

Sugarcane leaf area estimate obtained from the corrected Normalized Difference Vegetation Index (NDVI)

Pereira

Casaroli

Vellame

et al. 2016

Pesqui. Agropecu. Trop.

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“…There is a tendency of reduction in the degree Brix when the amount of irrigation is increased and the reduction of the ETpc (%) is reduced. This is due to the higher dilution of soluble solids (sugars) in the broth due to the larger amount of water available in the soil and, consequently, in the stems, due to the higher irrigation depth applied, confirming Scarpari and Beauclair (2008). These authors observed that in areas where water availability is higher, ºBrix values are lower because of the dilution of sugars.…”

Section: Resultsmentioning

confidence: 55%

Controlled water stress in agricultural crops in brazilian cerrado

Santos

Mantovani

Venâncio³

et al. 2020

Biosci. J.

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Considering the scenarios with reduction of water availability, the need to increase water use efficiency and crop yield, the objective of this study was to evaluate the effect of reducing the evapotranspiration of the main irrigated crops on productivity. Data from the years 2005 to 2016 for carrot, garlic, potato, sugarcane, bean, maize, soybean, wheat, coffee and cotton crops grown in the Brazilian states of Bahia, Minas Gerais, São Paulo, Goiás, Distrito Federal and Mato Grosso were collected. The crops were irrigated by central-pivot irrigation and drip irrigation systems, and irrigation management was performed using IRRIGER® software. With the information on potential crop evapotranspiration (ETpc) and crop evapotranspiration (ETc), it was possible to obtain a reduction of ETpc (%) for all crops. For all scenarios, these data were confronted with crop productivity and regression models were fitted. It was concluded that the maximum reductions of ETpc (%) without affecting productivity are 5% for garlic and potato, 12% for maize, 13% for bean, 15% for wheat, 20% for soybean and cotton, 25% for sugarcane and 30% for coffee.

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“…Teor de sólidos solúveis (ºBrix) (A) e de fibra (B) da cana-de-açúcar (cana-planta), variedade RB92579, em função das lâminas de irrigação aplicadas A redução do teor de sólidos solúveis verificadas com o aumento das lâminas de irrigação deve-se provavelmente a diluição mais acentuada dos sólidos do caldo em detrimento da maior disponibilidade de água no solo e, consequentemente, maior concentração no colmo, proporcionada pelo aumento das lâminas de irrigação aplicadas. A esse respeito, Scarpari e Beauclair (2008) verificaram que os menores valores de °Brix são encontrados em localidades de maior abundância de água, fato este justificado pela dissolução dos açúcares, indicando atraso da maturação. Oliveira et al (2011) também verificaram decréscimos no teor de sólidos solúveis da cana-deaçúcar quando submetida a diferentes regimes hídricos.…”

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Produtividade E Qualidade Tecnológica Da Cana-De-Açúcar Submetida a Diferentes Lâminas De Irrigação E Doses De Nitrogênio

Costa

Rolim

Neto

et al. 2019

R_I

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PRODUTIVIDADE E QUALIDADE TECNOLÓGICA DA CANA-DE-AÇÚCAR SUBMETIDA A DIFERENTES LÂMINAS DE IRRIGAÇÃO E DOSES DE NITROGÊNIO ANDRÉA RAQUEL FERNANDES CARLOS DA COSTA1; MÁRIO MONTEIRO ROLIM2; DJALMA EUSÉBIO SIMÕES NETO3; MANASSÉS MESQUITA DA SILVA4; GERÔNIMO FERREIRA DA SILVA5 E ELVIRA MARIA RÉGIS PEDROSA6 1 Departamento de Engenharia Agrícola, UFRPE, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife-PE, Brasil. E-mail: andrearaquel19@hotmail.com 2 Departamento de Engenharia Agrícola, UFRPE, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife-PE, Brasil. E-mail: mariorolim10@uol.com.br 3 Estação Experimental de Cana-de-Açúcar, UFRPE, Rua Ângela Cristina C. P. de Luna, s/n, Novo, CEP: 55914-030, Carpina-PE, Brasil. E-mail: djalmasneto@hotmail.com 4 Departamento de Engenharia Agrícola, UFRPE, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife-PE, Brasil. E-mail: manasses.ufrpe@gmail.com 5 Departamento de Engenharia Agrícola, UFRPE, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife-PE, Brasil. E-mail: agrogefe@yahoo.com.br 6 Departamento de Engenharia Agrícola, UFRPE, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, CEP: 52171-900, Recife-PE, Brasil. E-mail: elvira.pedrosa@ufrpe.br 1 RESUMO Dentre os fatores de produção, a irrigação e a adubação nitrogenada destacam-se como fundamentais para o aumento de produtividade e qualidade da cana-de-açúcar, assim, objetivou-se avaliar a produtividade e a qualidade tecnológica da cana-de-açúcar (cana-planta) submetida a diferentes lâminas de irrigação e doses de nitrogênio. A pesquisa foi executada em Carpina-PE, na Estação Experimental de Cana-de-Açúcar pertencente a Universidade Federal Rural de Pernambuco. Os tratamentos consistiram, em quatro lâminas de irrigação (1498; 1614; 1739 e 1854 mm) e cinco doses de nitrogênio (0; 20; 40; 80 e 120 kg ha-1) arranjados em faixas e delineados em blocos ao acaso com quatro repetições. As diferentes lâminas de irrigação, associadas às doses crescentes de nitrogênio proporcionaram aumento no rendimento de colmos e açúcar. Os teores de sólidos solúveis e de fibra da cana-de-açúcar diminuíram com o aumento das lâminas de irrigação, independentemente das doses de nitrogênio aplicadas. Os maiores teores de açúcar teórico recuperável e de sacarose no colmo da cana-de-açúcar, foram obtidos com a aplicação da lâmina de 1498 mm associada com a dose de 20 kg ha-1 de nitrogênio. Palavras-chave: Saccharum spp., rendimento, atributos tecnológicos, irrigação, adubação nitrogenada. COSTA, A. R. F. C. da; ROLIM, M. M.; SIMÕES NETO, D. E.; SILVA, M. M. da; SILVA, G. F. da; PEDROSA, E. M. R. PRODUCTIVITY AND TECHNOLOGICAL QUALITY SUGARCANE SUBMITTED TO DIFFERENT WATER DEPTHS AND NITROGEN DOSES 2 ABSTRACT Among factors that affect production, irrigation and nitrogen fertilization stand out as fundamental to increase productivity and quality of sugarcane, thus, the objective of this study was to evaluate productivity and technological quality of sugarcane (cane-plant) submitted to different water depths and nitrogen doses. The research was carried out in Carpina-PE, at the Experimental Station of Sugarcane belonging to the Federal Rural University of Pernambuco. Treatments consisted of four irrigation depths (1498; 1614; 1739 and 1854 mm) and five nitrogen doses (0; 20; 40; 80 and 120 kg ha-1), arranged in strips and outlined in randomized blocks with four replications. The different irrigation depths associated with increasing doses of nitrogen provided an increase in yield of stalks and sugar. The soluble solids content and sugarcane fiber decreased with increasing water depths, regardless of the applied nitrogen doses. The highest levels of recoverable theoretical sugar and sucrose content in the cane sugarcane were obtained with the application of the 1498 mm irrigation depths associated with the dose of 20 kg ha-1 of nitrogen. Keywords: Saccharum spp., yield, technological attributes, irrigation, nitrogen fertilization.

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Variação espaço-temporal do índice de área foliar e brix em cana-de-açúcar

Abstract: RESUMOOs objetivos do trabalho foram estudar a variação espaço-temporal do índice de área foliar (IAF) e do teor de sólidos solúveis (Brix) na cana-de-açúcar, em Piracicaba (SP) ,

Cited by 8 publications

References 14 publications

Sugarcane leaf area estimate obtained from the corrected Normalized Difference Vegetation Index (NDVI)

Sugarcane leaf area estimate obtained from the corrected Normalized Difference Vegetation Index (NDVI)

Controlled water stress in agricultural crops in brazilian cerrado

Produtividade E Qualidade Tecnológica Da Cana-De-Açúcar Submetida a Diferentes Lâminas De Irrigação E Doses De Nitrogênio

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