Physiological Maturation in Seeds of Sweet Soghum for Foliar Fertilisation With Silicate

Abstract

-The aim of this study was to evaluate physiological quality in seeds of sweet sorghum grown under semi-arid conditions, and to determine the age of physiological maturity of the seeds as a function of the foliar application of potassium silicate. The experiment was carried out at the Curu Valley Experimental Farm, in Pentecoste in the state of Ceará, during the rainy seasons of 2014 and 2015. The BRS 506 and BRS 511 varieties were used, under foliar fertilisation with potassium silicate at doses of 500, 1000 and 1500 mL.ha -1 , in addition to the control lots (with no application); harvesting was at four periods, 30, 37, 44 and 51 days after full bloom (DAB). The percentage and speed of germination were evaluated, together with the accelerated ageing test and seedling growth. The seeds presented greater than 90% germination from 37 DAB, reaching high seedling vigour at 51 DAB. Foliar fertilisation with potassium silicate under the conditions of the experiment resulted in an increase in the physiological quality of the seeds. The BRS 506 and BRS 511 cultivars displayed the highest physiological quality between 49 and 53 DAF.Keywords: Sorghum bicolor. Germination. Vigour. MATURAÇÃO FISIOLÓGICA DE SEMENTES DE SORGO SACARINO NO SEMIÁRIDO EM FUNÇÃO DA ADUBAÇÃO FOLIAR SILICATADARESUMO -O objetivo deste trabalho foi avaliar a qualidade fisiológica das sementes de sorgo sacarino cultivado em condição semiárida, procurando-se determinar a época de maturidade fisiológica das sementes em função da aplicação foliar com silicato de potássio. O experimento foi conduzido na Fazenda Experimental Vale do Curu, Pentecoste -CE no período de chuvas dos anos de 2014 e 2015. Utilizaram-se as variedades BRS 506 e BRS 511 sob adubação foliar com silicato de potássio nas doses 500; 1000 e 1500 mL.ha -1, além das parcelas controle (sem aplicação) e com colheita realizada em quatro épocas (30, 37, 44 e 51 dias após a plena floração (DAF)). Foram avaliados as porcentagens e velocidade de germinação, o teste de envelhecimento acelerado e o crescimento de plântulas. As sementes obtiveram germinação acima de 90% a partir dos 37 dias DAF, atingindo alto vigor de plântulas aos 51 dias APF. A adubação foliar com silicato de potássio nas condições aplicadas promoveu acréscimo na qualidade fisiológica das sementes. As cultivares BRS 506 e BRS 511 apresentam o máximo de qualidade fisiológica entre 49 e 53 dias DAF.Palavras-chave: Sorghum bicolor. Germinação. Vigor.

Coating Seeds With Silicon Enhances the Corn Yield of the Second Crop

“…However, there are several studies that highlight the beneficial effects that the availability of this element can bring. These benefits include: increased lodging resistance and photosynthetic efficiency; contributions to the physical functions of evapotranspiration regulations in corn (SOUSA; KORNDÖRFER; WANGEN, 2010); increased absorption and metabolism of elements, e.g., phosphorus; decrease in the toxic effects of iron, manganese, aluminum, sodium, and heavy metals (SHI et al, 2005) in the crop; mechanical resistance to the invasion of phytopathogenic microorganisms and insect pests (COSTA; MORAES; COSTA, 2009); and an increase in seed quality of sweet sorghum (LESSA et al, 2017).…”

Sweet sorghum for ethanol production in the semi-arid: response to potassium silicate and maturation

“…The silicon (Si) is part of the macronutrient category being assertive in energy storage or structural integrity for most plants, thus silicon application improves growth and development of many crops (Taiz et al, 2017). Chagas et al (2016) describe increase in grain yield and weight of dry matter of rice as a function silicon fertilization, while Lessa et al (2017) proves increase in the seeds physiologic quality of sweet sorghum.…”