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A Acacia polyphylla DC. e uma leguminosa, pertencente a familia Fabaceae, conhecida principalmente por monjoleiro, cuja arvore apresenta porte medio e rapido crescimento, a mesma enquadra-se em estagios iniciais da sucessao secundaria com grande potencial para o uso na recuperacao de areas degradadas do Bioma Cerrado. Assim, objetivou-se avaliar a influencia de diferentes posicoes e de profundidades de semeadura na emergencia e crescimento inicial de plântulas de Acacia polyphylla DC. O experimento foi realizado em delineamento inteiramente casualisado, com quatro repeticoes de 25 sementes, dispostos em esquema fatorial 3 x 5 (posicoes e profundidades de semeadura). Os tratamentos consistiram em diferentes posicoes das sementes no substrato: hilo voltado para cima, hilo voltado para baixo e sementes na horizontal, nas profundidades de 1, 2, 3, 4 e 5 cm. Determinou-se a porcentagem de emergencia, indice de velocidade de emergencia, bem como o comprimento e a massa seca da parte aerea e da raiz das plântulas. A emergencia e o crescimento inicial das plântulas de Acacia polyphylla DC sao afetadas pelas posicoes e profundidades de semeaduras, sendo que o procedimento ideal para o plantio e desenvolvimento das plântulas deve ser em uma profundidade entre 1,4 e 2,8 cm com o hilo na posicao horizontal. Influence of depth and sowing position in the emergency Acacia polyphylla DC. Abstract : Acacia polyphylla DC. is a legume belonging to the Fabaceae family, mainly known for monjoleiro whose tree has medium size and rapid growth, it fits in the early stages of secondary succession with great potential for use in the recovery of degraded areas of the Cerrado Biome. The objective was to evaluate the influence of different positions and sowing depths in the emergence and early growth of seedlings Acacia polyphylla DC. The experiment was conducted in completely randomized design with four replications of 25 seeds, arranged in a factorial 3 x 5 (positions and sowing depths). The treatments consisted of different positions of the seeds in the substrate: hilum facing up, hilum facing down and seeds horizontally at depths of 1, 2, 3, 4 and 5 cm. It was determined the percentage of emergence, emergence speed index, as well as the length and dry weight of shoot and root of seedlings. The emergence and early growth of seedlings Acacia polyphylla DC. are affected by the positions and sowing depths, and the ideal procedure for planting and seedling development must be at a depth between 1.4 and 2.8 cm, with the hilum in horizontal position.

Influência da profundidade e posição de semeadura na emergência de Acacia polyphylla DC.