Sugarcane leaf area index modeling under different soil water conditions

Teruel, Dioger Alexandre; Barbieri, V.; Ferraro, Luiz Antônio

doi:10.1590/s0103-90161997000300008

Cited by 36 publications

(27 citation statements)

References 4 publications

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“…Based on the value of Tb = 18 °C, recommended by Teruel et al (1997) for the conditions of São Paulo, we used, in this study, the value of 20 °C for the conditions of the Brazilian Savannah.…”

Section: Methodsmentioning

confidence: 99%

Variation in the sugar yield in response to drying-off of sugarcane before harvest and the occurrence of low air temperatures

et al. 2016

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AbstrAct:The need to irrigate sugarcane in the Brazilian Savanna is due to the lack of rain from April to September. For efficient sugar accumulation, the crop needs water stress or heat stress at the maturation stage. However, when the water deficit is intense at this stage, it occurs the reduction in crop production. The objective of this study was: (i) to assess the quality of the raw material of days before harvest, period in which the crop irrigation could be interrupted. The water deficit of 37.76 mm appears to be the critical limit of water shortage in the soil, from which the sugarcane yield starts to be reduced. The sugar concentration in the stalk was more influenced by low air temperatures than sugarcane yield.

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Section: Methodsmentioning

confidence: 99%

Variation in the sugar yield in response to drying-off of sugarcane before harvest and the occurrence of low air temperatures

et al. 2016

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“…Following the methodology by Teruel et al (1997), DD values were standardized for each day through the relation between photoperiod and the 12-hour period.…”

Section: Methodsmentioning

confidence: 99%

“…Leaves are directly responsible for solar energy absorption and conversion into chemical energy from photosynthesis. 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).…”

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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“…Adicionalmente, a análise de crescimento pode ser realizada por meio de avaliações sequenciais do acúmulo de matéria seca e/ou fresca ou, ainda, dos índices fisiológicos dela obtidos (Gava et al, 2001). Assim, a identificação das prováveis variações no desenvolvimento da cana-de-açúcar que ocorrem durante o ciclo, é fundamental para que se possa modelar e quantificar o crescimento nos diferentes ambientes de produção (Teruel et al, 1997).…”

Section: Introductionunclassified

Crescimento e acúmulo de matéria seca em variedades de cana-de-açúcar cultivadas sob irrigação plena

Oliveira

Andrade

et al. 2010

Rev. bras. eng. agríc. ambient.

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RESUMOA análise de crescimento é considerada o método padrão para medir a produtividade biológica em espécies vegetais. Neste contexto objetivou-se avaliar, em onze variedades de cana-de-açúcar (SP79-1011, RB813804, RB863129, RB872552, RB943365, RB72454, RB763710, SP78-4764, SP81-3250, RB867515, RB92579) cultivadas sob irrigação plena, o crescimento e a produção de matéria seca no ciclo de cana planta. O experimento foi instalado em condições de campo no município de Carpina, PE. Utilizou-se o delineamento estatístico de blocos ao acaso, com quatro repetições. A análise de crescimento correspondeu à quantificação dos números de perfilhos e à, na mensuração da altura e diâmetro dos colmos, avaliados mensalmente em onze períodos de cultivo, os quais se estenderam dos 60 aos 360 dias após o plantio (DAP). A produção de matéria seca foi quantificada a partir dos 120 DAP, com intervalos de amostragem a cada dois meses. Observou-se que as variedades RB92579 e SP81-3250 apresentaram o maior perfilhamento e produção de maté-ria seca e as variedades RB813804 e RB72454 às maiores médias de altura, enquanto as variedades RB867515 e RB72454 obtiveram os maiores diâmetros do colmo. Palavras-chave:Saccharum spp, perfilhamento, altura, diâmetro, produção biológica Growth and dry matter production in sugarcane varieties grown under full irrigation ABSTRACT Growth analysis is considered as a standard method for measuring the biological productivity of plant species. The objective of this research was to evaluate the growth and dry matter production of eleven sugarcane varieties (SP79-1011, RB813804, RB863129, RB872552, RB943365, RB72454, RB763710, SP78-4764, SP81-3250, RB867515, RB92579), grown under full irrigation, in the planted cane cycle. The experiment was conducted in field conditions in the municipality of Carpina, PE. A randomized block design with four replications was used. The varieties' growth analysis was represented by the quantification of the tillers numbers, stalk height and diameter, measured monthly, in eleven periods of cultivation that extended from 60 to 360 days after planting (DAP). The dry matter production was measured from 120 DAP, with sampling intervals of every two months. It was observed that, at 360 DAP, the RB92579 and SP81-3250 varieties showed the highest tillering and dry matter production. The RB813804 and RB72454 varieties had the highest average for height, while the RB72454 and RB867515 varieties presented the largest stalk diameters.

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Sugarcane leaf area index modeling under different soil water conditions

Cited by 36 publications

References 4 publications

Variation in the sugar yield in response to drying-off of sugarcane before harvest and the occurrence of low air temperatures

Variation in the sugar yield in response to drying-off of sugarcane before harvest and the occurrence of low air temperatures

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

Crescimento e acúmulo de matéria seca em variedades de cana-de-açúcar cultivadas sob irrigação plena

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