Influência da temperatura e do substrato na germinação e desenvolvimento inicial de plântulas de rúcula (Eruca sativa Mill.) RES UMOVisa-se, no presente trabalho, avaliar o efeito de diferentes substratos e regimes de temperatura sobre a germinação de sementes e o desenvolvimento de plântulas de rúcula. O delineamento experimental adotado foi o inteiramente casualisado, em esquema fatorial 5 x 4 (cinco substratos: vermiculita, pó-de-coco, Tropstrato®, papel mata-borrão e espuma fenólica e quatro temperaturas: 25, 30, 35 e 20-35ºC), com quatro repetições de 25 sementes cada uma. Avaliaram-se os seguintes parâmetros: germinação (%), primeira contagem da germinação (%), índice de velocidade de germinação, comprimento do hipocótilo e da raiz primária das plântulas normais (cm). A temperatura constante de 30ºC e os substratos pó de coco, vermiculita, Tropstrato® e papel mata-borrão, mostraram-se os mais indicados para condução do teste de germinação, uma vez que proporcionaram, às sementes, maior velocidade de germinação e favoreceram o desenvolvimento das plântulas de rúcula. Palavras-chave: ecofisiologia, sementes de hortaliças, vigorInfluence of temperature and substrate on germination and initial development of Eruca sativa seedlings AB S TR ACTThe present work had the objective of evaluating the effect of different substrates and temperatures on the germination of seeds and development of Eruca sativa seedlings. The experiment was conducted in a completely randomized design in a 5 x 4 factorial arrangement (4 temperatures: 25, 30, 35 and 20-35 ºC and 5 substrates: vermiculite, coconut fiber, Tropstrato®, blotting paper and phenolic foam) with four replications of 25 seeds. The following parameters were analyzed: germination (%), first germination count (%), germination speed index, length of hypocotyl and the primary root (cm). The constant temperature of 30 ºC and the substrates on vermiculite, coconut fiber, Tropstrato® and blotting paper, were considered to be the most suitable for the conduction of germination tests of Eruca sativa seeds and for improvement of the development of the seedlings.
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