Parâmetros tecnológicos e produtivos da cana-de-açúcar quando submetida à aplicação de maturadores químicos no início de safra

Viana, Ronaldo da Silva; Lisboa, Lucas Aparecido Manzani; Figueiredo, Paulo Alexandre Monteiro de; Neto, Arthur Duarte Rodrigues

doi:10.7824/rbh.v16i1.496

Cited by 5 publications

(10 citation statements)

References 9 publications

(14 reference statements)

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“…However, after 45 days of application, mixed ripening agents (ethyl-trinexapac + glyphosate, ethyltrinexapac + sulfometuron methyl and sulfometuron methyl + glyphosate) resulted in a tendency towards a better quality than the control treatment (Viana et al, 2015). The mean values, as shown in Table 2, for the technological characteristics of juice purity and total reducing sugars showed higher averages when plants were treated with the plant growth regulators etephon at 0.33 and 0.66 L ha -1 and sulfometuron-methyl at 5 g ha -1 , at 37 and 44 days after application of chemical ripening agents.…”

Section: Resultsmentioning

confidence: 99%

Morpho-anatomical aspects and technological quality of saccharine sorghum submitted to plant regulators

et al. 2016

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-With the increase in the demand for renewable fuels, the sugarcane industry must seek a way of increasing agro-industrial productivity while reducing production costs. Currently, there are few reports on the use of plant growth regulators in saccharine sorghum crops. The objective of this study was to evaluate the effects of the application of chemical ripening agents on the technological quality and the morphological and anatomical aspects of saccharine sorghum. The experiment was conducted at the Cerradinho Mill in Catanduva, São Paulo state. Plant growth regulators applied were etephon at 1.32, 0.66 and 0.33 L ha -1 , sulfometuron-methyl at 20.0, 10.0 and 5.0 g ha -1 , thiadizuron at 0.150, 0.100 and 0.50 L ha -1 , ethyl-trinexapac at 0.80, 0.40 and 0.20 L ha -1 and a control treatment. The experiment was conducted in randomized blocks with a subplot design with four replications. The following technological parameters were evaluated: juice purity, reduced sugars, total recoverable sugars, juice brix, juice pol, theoretical recoverable sugars and fiber (%). The thickness of the upper face or adaxial epidermis (AdE), the thickness of the lower face or abaxial epidermis (AbE), sclerenchyma diameter (SD), mesophyll thickness (MT), diameter of xilematic vessels (DX) and diameter of phloematic vessels (DP) were evaluated. It is concluded that saccharine sorghum showed a significant increase in technological quality when etephon was used at dose of 0.33 L ha -1 , and at 0.66 L ha -1 between 37 and 44 days after the application of chemical ripening agents. For the technical characteristics, the chemical ripening agent sulfometuron-methyl and etephon in doses of 5 g. ha -1 and 0.33 L ha -1 , respectively, promoted the best results from the 37 days after application. For anatomic characteristics of saccharide sorghum plants, the chemical ripener agent thiadizuron in dose of 0.100 L ha -1 showed the best results at 44 days after application. Keywords: hormonal phytoregulators; stress phytoregulators; raw material quality; chemical ripening agents tem tido como desafio o aumento da produtividade agroindustrial, além da redução dos custos de produção. Atualmente, são escassos os relatos da utilização de reguladores vegetais na cultura do sorgo sacarino. O objetivo deste trabalho foi avaliar aplicação dos reguladores vegetais na qualidade tecnológica e aspectos morfoanatômicos do sorgo sacarino. O ensaio foi realizado na usina Cerradinho em Catanduva SP. As aplicações dos reguladores vegetais foram: etephon nas dosagens de 1,32, 0,66, 0,33 L ha -1 , sulfometuron-methyl nas dosagens de 20, 10, 5 g ha -1 , thiadizuron nas dosagens de 0,150, 0,100, 0,50 L ha -1 , ethyl-trinexapac nas dosagens de 0,80, 0,40, 0,20 L ha -1 e controle. O experimento foi conduzido em Blocos Casualizados, no esquema de parcelas subdivididas com quatro repetições. Foram avaliadas as variáveis tecnológicas: pureza do caldo, açúcares redutores, açúcares totais recuperáveis, brix do caldo, pol do caldo, açúcares teóricos recuperáveis, f...

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Section: Resultsmentioning

confidence: 99%

Morpho-anatomical aspects and technological quality of saccharine sorghum submitted to plant regulators

et al. 2016

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“…In early September 2016, ripeners treatments consisted of spraying the ingredients exogenously on the plants of sugarcane before the flowering stage, with T-shaped, 2 m-length, CO 2 -pressurized backpack sprayer containing a set of six AXI-11002 flat spray nozzles at 0.5 m apart from one another. We performed the spraying at the pressure of 40 psi and spray flow of 300 L per hectare [6]. During the spray application in the morning, from 8:00 a.m. to 10:00 a.m., temperature and relative humidity of the air were in the ranges of 25-30 • C and 50-60%, respectively.…”

Section: Spraying Of Chemical Ripening Agents On the Varieties Of Sugmentioning

confidence: 99%

“…Nevertheless, industrial decentralization and opening of agricultural frontiers across national territory are factors driving the milling plants, biorefineries, and distilleries to migrate from Southeast towards the Midwest and Northeast. Drought, heat, salinity, and pests are the major abiotic and biotic stressing agents declining the productivity and quality of extensive plantations of sugarcane in the Midwest and Northeast, tropical regions where huge requirements of expensive inputs, such as irrigation, fertilizers, and pesticides, make the total cost of production and market price of products to some extent high, thus, threatening the sustainability of sugar-energy sector [5][6][7]. The development and implementation of strategies to enable producers adequately grow sugarcane under marginal lands are, therefore, necessary for both technical and economic reasons [8].…”

Section: Introductionmentioning

confidence: 99%

Glyphosate Plus Carboxylic Compounds Boost Activity of Free Radical-Scavenging Enzymes in Sugarcane

et al. 2020

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Drought, heat, and salinity, as well as pests, are stressing agents, which have impressively declined the productivity and quality of sugarcane crop in harsh environments. Our study aimed to examine the effect of various chemical ripeners as alternatives to enhancing the reactiveness of the enzymatic antioxidant system of sugarcane crop. The field experiment consisted of spraying the ingredients, ethephon, ethyl-trinexapac, glyphosate, carboxylic compounds (MTD) and methyl-sulfumeturon on the Brazilian commercial varieties, SP80-1842 and SP80-3280, before flowering stage. The enzymatic assay comprised the monitoring of the rate of degradation of free radical by ascorbate peroxidase (APX), catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) in the extract from leaves of 11-month-old plants. Spraying glyphosate at 0.15 L ha−1 with MTD at 1.00 L ha−1 provided the highest activity of CAT, 0.65 µmol H2O2 min−1 mg−1 protein, in variety SP80-1842 Spraying glyphosate at 0.15 L ha−1 with ethephon at 0.33 L ha−1 caused the highest activity of APX, 1.70 nmol ascorbate min−1 mg−1 protein, in variety SP80-3280. The conclusion is, therefore, that mixtures of glyphosate with the insecticide/acaricide, MTD, and with the synthetic ethylene-releasing product, ethephon could help sugarcane crop grow adequately under uncontrollable or unpredictable agroecosystems like marginal lands.

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“…Lowered total soluble solids content in sugarcane plant with K-phosphite at higher doses was probably due to phytotoxicity. The scientific study by Viana et al (2017) on the productivity and technological quality of sugarcane crop following chemical ripening agents spraying described plant nutrition and physiological ripening as two of the most relevant factors influencing total soluble solids content in cane juice.…”

Section: Total Soluble Solidsmentioning

confidence: 99%

Jasmonic Acid and K-Phosphite Enhance Productivity and Technological Quality of Sugarcane Crop

Moreira¹,

Viana²,

Lisboa³

et al. 2019

JAS

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Plant resistance inducers are cost-effective and environmentally pleasing strategies of plant protection to mitigate biotic and abiotic agents threatening food safety and energy security. We, accordingly, present jasmonic acid and k-phosphite as low-cost strategies to enhance productive yield and technological quality of sugarcane crop. Exogenously treatment of the sugarcane variety ‘SP81-3250’ consisted of carrying out foliar application of jasmonic acid at 1, 1.5 and 2 ml L-1 and K-phosphite at 2, 4 and 6 ml L-1 before crop flowering. Interestingly, both systemic phytorregulator and foliar fertilizer at the lowest doses significantly improved contents of total soluble solids and sucrose, as well as productive yield of fermentable sugars. Jasmonic acid could promote growth and development by triggering either non-enzymatic or enzymatic mechanisms in the host self-defense system to support of external stresses, including herbivory by sugarcane-borer. K-phosphite could improve crop performance by not only releasing water-soluble inorganic ions like phosphorus and potash, but also by signaling synthesis of phytoalexins. Purity of cane juice and productivity of stalks sharply decreased, as the doses of the plant-resistance inducers increased. Jasmonic acid and k-phosphite at unbalanced endogenous levels could inhibit physiological ripening and specific enzymatical activity of alkaline invertases and sucrose-phosphate synthase, thereby influencing bioavailability of sucrose. The lower the sucrose content, the poorer the technological quality of sugarcane crop. The conclusion is, therefore, jasmonic acid and K-phosphite at lower doses prove to be effective induced resistance techniques to produce richer feedstock, with potential to produce ethanol fuel and refined sugar in sugar-energy plants.

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Parâmetros tecnológicos e produtivos da cana-de-açúcar quando submetida à aplicação de maturadores químicos no início de safra

Cited by 5 publications

References 9 publications

Morpho-anatomical aspects and technological quality of saccharine sorghum submitted to plant regulators

Morpho-anatomical aspects and technological quality of saccharine sorghum submitted to plant regulators

Glyphosate Plus Carboxylic Compounds Boost Activity of Free Radical-Scavenging Enzymes in Sugarcane

Jasmonic Acid and K-Phosphite Enhance Productivity and Technological Quality of Sugarcane Crop

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