This work was carried out with objective to verify the effect of Dalbergia nigra seeds number and water volume in the electrical conductivity test (EC) and the correlation this results with germination datas in laboratory and nursery. The germination tests were conduced with four replications of 25 seeds. The EC was conduced with 25, 50 and 75 seeds imbibited in 75, 100 and 125ml of water by diferent period. Lot III showed lower physiological quality than lots I and II, considering the results obtained in the laboratory and in the nursery. The EC decreased with the increase of the volume of water and increased with the imbibition period. Lots I and II presented EC values lower than lot III, when the water volume was 75ml and 50 seeds were used; the differentiation of lots was more efficient when the imbibition period was, at least, of 36 hours. The simple correlation coefficients between EC and the characteristics evaluated under lab and nursery conditions, evidenced that the EC test was efficient to distinguish the physiological quality of the studied seed lots because presented high association between them. The EC test can be used to establish the physiological quality of Dalbergia nigra seed lots. It can be conducted at 25ºC, with samples of 50 seeds and 75ml of deionized water, and imbibition periods equal or longer than 36 hours.
Dalbergia nigra; jacarandá-da-Bahia; electrical conductivity; physiological quality
