APLICAÇÃO DE FITORREGULADORES QUÍMICOS NA QUALIDADE TECNOLÓGICA DO SORGO SACARINO CV. BIOMATRIX 535
DOI:
https://doi.org/10.18512/1980-6477/rbms.v14n3p326-334Keywords:
fito regulador hormonais, fito reguladores estressantes, etanolAbstract
RESUMO - Este trabalho buscou avaliar a aplicação dos fitorreguladores químicos na qualidade tecnológica do sorgo sacarino. O ensaio foi realizado na Usina Cerradinho, localizada em Catanduva-SP. O delineamento experimental utilizado foi em blocos casualizados, no esquema de parcelas subdivididas, em que os tratamentos foram constituídos pela combinação de dez tratamentos envolvendo as aplicações dos fitorreguladores químicos: 5; 10; 20 g ha-1 sulfome-turon-methyl; 0,10; 0,20; 0,40 L ha-1 glifosate; 0,2; 0,4; 0,8 L ha-1 ethyl-trinexapac e testemunha. Nos subtratamentos, foram realizadas as amostragens para as avaliações da qualidade tecnológica em épocas distintas após aplicação dos maturadores químicos. A área foi dividida em quatro repetições, cada parcela foi formada de cinco linhas espaçadas de 0,75 m entre si, por 10 m de comprimento, constituída pela cultivar de sorgo sacarino Biomatrix 535. Foram avaliadas qualidades tecnológicas como: pureza (% caldo); açúcares redutores; açúcares redutores totais; brix (% caldo); pol (% caldo); açúcares teóricos recuperáveis; e fibra (%). Os fitorreguladores químicos glifosate na dose de 0,40 L ha-1 e ethyl-trinexapac nas dosagens de 0,20; 0,40 e 0,80 L ha-1 promoveram maior incremento na qualidade tecnológica do sorgo sacarino. As épocas de colheita não influenciaram nas características tecnológicas do sorgo sacarino.
Palavras-chave: hormônios, maturadores químicos, etanol.
APPLICATION OF CHEMICAL GROWTH REGULATORS ON THE TECHNOLOGICAL QUALITY OF SWEET SORGHUM CV. BIOMATRIX 535
ABSTRACT - This study aimed to evaluate the effect of the application of chemical plant growth regulators on technological quality of sweet sorghum. The assay was performed in the Cerradinho mill located in Catanduva-SP, using the cultivar 535 Biomatrix of sweet sorghum , The experimental design was a randomized block in a split plot, with 10 treatments involving the application of chemical growth regulators: 5; 10; 20 g ha-1 sulfometuron-methyl; 0.10; 0.20; 0.40 L ha-1 glyphosate; 0.2; 0.4; 0.8 L ha-1 ethyl-trinexapac and control. Samplings for assessment of quality were performed at different times after application of the chemical maturators. The area was divided into four blocks (replications), each plot consisted of five 10 m long rows spaced 0.75 m. Broth purity, reducing sugars, total reducing sugar, Brix (% juice), Pol (broth), theoretical recoverable sugar and fiber (%) were evaluated. Glyphosate at 0.40 L ha-1 and ethyl-trinexapac at 0.20; 0.40 and 0.80 L ha-1 caused the highest increases on technological quality of sweet sorghum. Harvest time did not affect the technological characteristics of sweet sorghum.
Key words: hormones,chemical maturators, ethanol.
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