Technological quality and yield of sugarcane grown under nitrogen doses via subsurface drip fertigation

Abstract

A B S T R A C TThis study characterized the technological quality and yield of sugarcane cv. SP80-3280 under nitrogen doses via subsurface drip fertigation. Five treatments were established using N-fertilizer in the form of urea (0, 50, 100, 150 and 200 kg N ha -1 ), with four replicates, applied via subsurface drip fertigation. The technological quality (fiber% cane; Brix% juice; pol% juice, pol% cane; juice purity and total recoverable sugar -TRS), as well as yield of stalks and sugar were determined 381 days after the third harvest. The technological variables Brix%, pol% juice, purity% and TRS of sugarcane, cultivar SP80-3280, were altered by the application of nitrogen doses via subsurface drip fertigation, with significant reductions at the dose of 200 kg N ha -1 . Stalk and sugar yields increased linearly with the increment in nitrogen doses applied through subsurface drip fertigation.Qualidade tecnológica e produtividade da cana-de-açúcar sob doses de nitrogênio via fertirrigação subsuperficial por gotejamento R E S U M O Neste trabalho foram avaliadas a qualidade tecnológica e a produtividade da cana-de-açúcar cv. SP80-3280 sob doses de nitrogênio via fertirrigação subsuperficial por gotejamento. O ensaio foi instalado e conduzido em campo em blocos casualizados com cinco tratamentos e quatro repetições. Os tratamentos consistiram de doses de nitrogênio (0, 50, 100, 150 e 200 kg de N ha -1 ) na forma de ureia aplicadas via fertirrigação por gotejamento subsuperficial. Aos 381 dias após o terceiro corte foram determinadas a qualidade tecnológica (fibra% cana; Brix% caldo; pol% caldo; pol% cana; pureza do caldo e açúcar total recuperável) e a produtividade de colmos e de açúcar. As variáveis tecnológicas Brix, pol% caldo, pureza% e açúcar total recuperável (ATR) da cultivar SP80-3280 de cana-de-açúcar foram alteradas mediante a aplicação das doses de nitrogênio via fertirrigação subsuperficial por gotejamento com reduções significativas na dose de 200 kg N ha -1 . As produtividades de colmos e de açúcar aumentaram linearmente com o aumento de doses de nitrogênio via fertirrigação por gotejamento subsuperficial.

Agro-industrial quality of plant cane, first and second ratoon in sugarcane varieties

“…These advances are the result of research and technologies developed in the country over years. There has been great development in knowledge of plant nutrition, cultivation practices and production management (Oliveira et al, 2014;Simões et al, 2015;Rhein et al, 2016). The researches for high productivity and cost reduction are pursued using several strategies including adoption of varieties that present a better agricultural and industrial yield (Mohammed et al, 2016).…”

Stalk productivity and quality of three sugarcane varieties at the beginning, in the middle, and at the end of the harvest

“…In all of the harvesting periods, all of the varieties presented over 80% purity, which is considered adequate for sugarcane industrialization (Rhein et al, 2016;Rodolfo Junior et al, 2016). In this paper, average purity in the cane-plant and first regrowth cycles was greater than that reported by Oliveira et al (2011) andSilva (2013).…”

“…In this paper, average purity in the cane-plant and first regrowth cycles was greater than that reported by Oliveira et al (2011) andSilva (2013). High PUR in sugarcane juice is desired at the time of harvesting, since it implies a higher concentration of sucrose and reduced amino acids, organic acids, starch, reducing sugars, and other color precursor compounds (Rhein et al, 2016;Rodolfo Junior et al, 2016).…”

“…This is the result of research, with technological improvement programs developed in the country over decades making new varieties available with high productive potential. There have been great advances in knowledge of soils and plant nutrition, in cultivation practices, production management, and cane payment for juice quality (Oliveira et al, 2014a;Simões et al, 2015;Rhein et al, 2016). The adoption of improved varieties has also contributed to an increase in cane productivity and crop profitability (Souza et al, 2012;Silva, 2013).…”

“…In evaluations of the productive potential of particular sugarcane varieties, industrialized stalk productivity per hectare (TSH) and juice quality should be evaluated, especially apparent sucrose (AS) and inorganic phosphorus (Pi) levels (Tasso Júnior et al, 2014;Rhein et al, 2016). Sucrose is the raw material in sugar and alcohol production and the Pi concentration in juice is important both for yeast metabolism in alcoholic fermentation and in sugar production (Oliveira et al, 2011;Tasso Júnior et al, 2014;Mohammed et al, 2016).…”