RESUMO -É de interesse prático, quando se dispõe de diferentes lotes de sementes, conhecer a qualidade fisiológica intrínseca a cada um. Objetivou-se determinar a qualidade fisiológica de lotes de sementes da leguminosa forrageira tropical, Macrotyloma axillare cv. Java, com utilização de diferentes metodologias para realização dos testes germinação e vigor. Determinou-se a pureza física dos lotes, o peso de mil sementes, a germinação com e sem escarificação (TG) e o vigor (índice de velocidade de germinação (IVG), primeira contagem, envelhecimento acelerado e condutividade elétrica) de três lotes de sementes. Diferenças na qualidade fisiológica inicial de sementes escarificadas foram observadas pelo teste de germinação. Pelos resultados dos testes de primeira contagem e IVG não foi possível detectar diferenças na qualidade fisiológica das sementes; o envelhecimento acelerado das sementes escarificadas pode ser realizado a 41º C por 72 horas ou a 45º C por 48 horas; o teste de condutividade elétrica mostrou-se adequado para diferenciar os lotes, a partir de 48 horas de embebição.Termos para indexação: Forrageira tropical, vigor, macrotiloma. PHYSIOLOGICAL AND PHYSICAL QUALITY OF SEED OF THE FORAGE LEGUMEMacrotyloma axillare cv. Java ABSTRACT -It is of practical interest, when using different lots of seeds, to know the intrinsic physiological quality of each one. The objective of this research was to evaluate the physiological characteristics of the tropical forage legume, Macrotyloma axillare cv. Java (perennial horse gram) submitted to different methodologies to determine the physiological quality of three seed lots of this cultivar. The physical purity, 1000 seeds weight, germination test with and without scarification (GT) and vigour (speed of germination index (SGI), first count of SGT; electrical conductivity and accelerated aging) of three lots of seeds were determined. Differences in initial physiological quality of scarified seeds could be observed by the germination test. The results showed that: first count of germination and SGI were not sensitive to detect differences in seed physiological quality of these three lots; accelerated aging of scarified seeds can be performed at 41ºC/ 72 hours or at 45ºC for 48 hours; the electrical conductivity test was adequate to differentiate lots of scarified seeds after 48 hours imbibition.
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