Saccharin sorghum submitted to application of phosphorus and ethephon

Maria Gabriela De Oliveira Andrade,Sebastião Ferreira De Lima,Maria Julia Betiolo Troleis,Vanessa Dias Rezende Trindade,Marco Eustáquio De Sá,Ronaldo Da Silva Viana

doi:10.33448/rsd-v9i7.4677

Maria Gabriela De Oliveira Andrade, Sebastião Ferreira De Lima + Show 4 more

Open Access

https://doi.org/10.33448/rsd-v9i7.4677

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Abstract

Saccharin sorghum (Sorghum bicolor L. Moench) is a promising energy crop due to the storage of fermentable sugars in the stems, which are easily converted into ethanol. The objective of this study was to evaluate the influence of the application of phosphorus and Ethephon on the development, productivity of sorghum and technological quality of saccharin sorghum. The experiment was conducted at Teaching and Research Farm, located in Selviria-MS. The experimental design was a randomized complete block design with a 5x4 double factorial design, with five doses of phosphorus (0, 40, 80, 120, 160 kg ha-1 P2O5) and four doses of Ethephon (0, 330, 660, 1,320 mL ha-1) with four replicates. The variables analyzed were: plant height, stem diameter, leaf number, stand at 15 and 60 days after Ethephon application (D.A.A), fresh and dry biomass volume and yield. In addition, the following technological variables were evaluated: soluble solids content (BRIX%); sucrose content (POL%); reducing sugars (RS%); total reducing sugars (TRS%); fiber (%); purity (%) and humidity. The doses of P2O5 did not influence the productivity, but increased the stem diameter. Ethephon doses did not influence the yield of sorghum, but improved the technological quality of the extracted juice.

Highlights

The experimental design was randomized blocks in a 5x4 factorial scheme, with five phosphorus doses (0, 40, 80, 120 and 160 kg ha-1 of P2O5), based on simple superphosphate (18% P2O5, 16% Ca, 8% S), with the fertilizer placed in the sowing furrow and four doses of the Ethephon phytoregulator (0, 330, 660 and 1,320 mL ha-1), with four replications, totaling 80 plots
The following evaluations were carried out: average plant height, with a ruler graduated in centimeters, measuring the distance between the neck and panicle, basal diameter of the stem with caliper, at 15, 30.45 and 60 days after application (DAA) of Ethephon in which three plants were randomly evaluated in the useful area of each experimental plot
For both cases there were no significant interactions between the two factors

Summary

Saccharin sorghum presentado a la aplicación de fósforo y ethephon

Recebido: 19/05/2020 | Revisado: 21/05/2020 | Aceito: 25/05/2020 | Publicado: 05/06/2020. Objetivou-se avaliar a aplicação de doses de fósforo (P) e de Ethephon no desenvolvimento, produtividade e qualidade tecnológica do sorgo sacarino. O delineamento experimental foi em blocos ao acaso, em esquema fatorial 5x4, sendo cinco doses de fósforo (0, 40, 80, 120 e 160 kg ha-1 de P2O5), utilizando como fonte o superfosfato simples e quatro doses do Ethephon (0, 330, 660 e 1.320 mL ha-1), com quatro repetições. As variáveis analisadas foram: altura de plantas, diâmetro do colmo, número de folhas, stand aos 15 e 60 dias após a aplicação (D.A.A) de Ethephon, volume de biomassa fresca e seca e produtividade. As doses de P2O5 não influenciaram a produtividade, porém aumentaram o diâmetro do colmo. As doses de Ethephon não influenciaram a produtividade do sorgo sacarino, porém melhorou a qualidade tecnológica do caldo extraído.

Introduction

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Results and Discussion