INFLUÊNCIA DE POPULAÇÕES, DE ÉPOCAS DE SEMEADURA E DE CORTE NA PRODUTIVIDADE DO SORGO SACARINO BRS 506
DOI:
https://doi.org/10.18512/1980-6477/rbms.v15n1p94-104Keywords:
sorghum bicolor, brix,Abstract
RESUMO – O sorgo sacarino é uma excelente opção para a produção de etanol sob os pontos de vista agronômico e industrial. Possui alta produção de massa verde e colmos suculentos com açúcares fermentáveis. O objetivo foi avaliar o sorgo sacarino quanto a características industriais relacionadas à produção de etanol em função de épocas de semeadura na região de Lavras, MG. Foram instalados cinco experimentos em intervalos de 21 dias a partir de 01/11/2012, no CDTCA / UFLA, em Lavras, MG. O delineamento experimental foi blocos casualizados, em esquema de parcelas subdivididas, com cinco repetições. Para as cinco épocas de semeaduras, as parcelas foram formadas por duas populações de plantas (100 e 130 mil plantas ha-1) e as subparcelas por duas épocas de corte / colheita das plantas. Utilizou-se a variedade de sorgo sacarino BRS 506. As variáveis avaliadas na colheita foram: matéria verde; volume de caldo; sólidos solúveis totais (ºbrix); e toneladas de brix por hectare (TBH). As épocas de semeadura, as populações e as épocas de corte influenciaram o rendimento de matéria verde, o volume de caldo e as TBH. A semeadura realizada em 22 de novembro na época de corte aos 20 DAF e na população de 130 mil plantas ha-1 proporcionou incremento na maioria das variáveis.
Palavras-chave: Sorghum bicolor, produção de etanol, brix, biocombustíveis.
EFFECTS OF PLANT POPULATION, SOWING DATE AND HARVEST TIME ON PRODUCTIVITY OF SACCHARINE SORGHUM BRS 506
ABSTRACT- Sweet sorghum is an excellent option under the agronomic and industrial points of view, presenting succulent stems with fermentable sugars and high green matter production. The objective of the present study was to evaluate saccharine sorghum regarding the industrial characteristics related to the production of ethanol and different periods of sowing in Lavras-MG region. Five experiments were done in intervals of 21 days, in the Centre for Technological and Scientific Development in Agriculture UFLA, Lavras-MG. A randomized blocks experimental design was used with five replications. The sweetness of juice of the variety BRS 506 was assessed in a Split-Plot design,, with two populations (100 and 130 thousands plants per hectares) and two different periods of cutting (20 and 40 DAF). At harvest the variables evaluated were: green matter, broth volume, total soluble solids (ºbrix) and tons of Brix per hectare (TBH). Sowing date, population and cutting season affected the yield of green matter, volume of broth and TBH. Sowing at 22 November, cutting at 20 DAF and population of 130,000 plants ha-1 caused increase in most characteristics.
Key words: sorghum bicolor, production of ethanol, brix, biofuels.
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