CONDUTIVIDADE ELÉTRICA NA AVALIAÇÃO DA QUALIDADE FISIOLÓGICA DE SEMENTES DE SORGO SACARINO
DOI:
https://doi.org/10.18512/1980-6477/rbms.v18n1p158-167Keywords:
Sorghum bicolor, vigorAbstract
RESUMO - Estudos têm mostrado que o teste de germinação nem sempre revela diferenças na qualidade fisiológica
entre lotes de sementes, sendo necessária a complementação dos resultados com os testes de vigor, e, dentre eles,
destaca-se o de condutividade elétrica, por ser considerado rápido, simples e confiável. Objetivou-se no presente trabalho
identificar um trinômio constituído por volume, temperatura e tempo de embebição que possibilite o ranqueamento
entre lotes a partir do teste de condutividade elétrica. O experimento foi conduzido em delineamento inteiramente
casualizado, distribuído em parcelas subdivididas com três temperaturas (20, 25 e 30 °C) x quatro lotes (L1, L2, L3 e
L4) x sete períodos de embebição (2, 4, 8, 12, 16, 20 e 24 horas) e embebidas em dois volumes de água (50 e 75 mL).
A temperatura consistia na parcela, os tempos de embebição como as subparcelas e os lotes como sub-subparcelas,
com quatro repetições por tratamento. O teste de condutividade elétrica mostra-se eficiente na diferenciação de lotes de
sementes sorgo sacarino. Para a condução do teste de condutividade elétrica, recomenda-se a embebição das sementes
na temperatura de 30 °C por 12 horas utilizando o volume de 50 mL de água.
Palavras-chave: Sorghum bicolor, germinação, potencial fisiológico, vigor.
ELECTRICAL CONDUCTIVITY IN THE EVALUATION OF THE
PHYSIOLOGICAL QUALITY OF SORGHUM SEEDS
ABSTRACT - Studies have shown that the germination test does not always reveal differences in the physiological
quality between seed lots, and it is necessary to complement the results with the vigor tests, among which the electrical
conductivity is outstanding, since it is considered fast, simple and trustworthy. The objective of this work was to
identify a trinomial consisting of volume, temperature and imbibition time that allows the ranking between batches
from the electrical conductivity test. The experiment was conducted in a completely randomized design, distributed in
subdivided plots with three temperatures (20, 25 and 30 ºC) x four lots (L1, L2, L3 and L4) x seven periods of rainfall
(2, 4, 8, 12, 16, 20 and 24 hours) and soaked in two volumes of water (50 and 75 ml). The temperature consisted of the
plot, the imbibition times as the sub-plots and the lots as sub-sub-plots, with four replicates per treatment. The electrical
conductivity test was efficient in the differentiation of lots of sorghum seeds. To perform the electrical conductivity
test it is recommended to soak the seeds at a temperature of 30 ºC for 12 hours using the volume of 50 mL of water.
Keywords: Sorghum bicolor, germination, physiological potential, vigor.
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