Propôs-se, neste trabalho, avaliar manta (condicionador do solo) formada de fibra de coco e resÃduo agregante com diferentes
substratos no crescimento inicial de plantas de Acacia mangium Willd. Utilizou-se o delineamento de blocos ao acaso, com
13 tratamentos e três repetições, distribuÃdos em esquema fatorial (6 x 2 + 1), sendo 6 proporções de fibra de coco e resÃduo
agregante (100 e 0%, 90 e 10%, 80 e 20%, 70 e 30%, 60 e 40%, 50 e 50%), 2 substratos contendo lodo de esgoto (terra de
subsolo de Latossolo Vermelho-Amarelo (LVA) + lodo de esgoto na proporção 2:1) e esterco bovino (terra de subsolo de
Latossolo Vermelho-Amarelo (LVA) + esterco bovino curtido na relação 3:1), e a testemunha como tratamento adicional, terra
de subsolo de Latossolo Vermelho-Amarelo (LVA). Após 173 dias da semeadura a manta, contendo LVA + esterco bovino
curtido (3:1), foi superior ao substrato com terra de subsolo de LVA e lodo de esgoto (2:1) no desenvolvimento inicial de
A. mangium Willd em altura e comprimento da raiz. Mantas contendo aproximadamente de 90 a 100% de fibra de coco e de
0 a 10% de resÃduo agregante proporcionaram melhores caracterÃsticas de crescimento de A. mangium Willd em condições de
campo.
The purpose of this work was to evaluate litter layer (soil conditioner) formed of coconut fiber and aggregating residue with
different substrate in the initial growth of Acacia mangium Willd plants. A completely randomized block was utilized, with
13 treatments and three replications, in a factorial arrangement (6 x 2 + 1), with 6 proportions of fiber of coconut and
aggregating residue (100 and 0%, 90 and 10%, 80 and 20%, 70 and 30%, 60 and 40%, 50 and 50%), 2 substrates, one
containing sewage sludge (subsoil of Red-Yellow Latosol (LVA) plus sewage sludge in the proportion 2:1) and the other with
bovine manure (subsoil of Red-Yellow Latosol (LVA) plus decomposed bovine manure in the relation 3:1), and the control as
additional treatment, subsoil of Red-Yellow Latosol (LVA). After 173 days of the sowing, the litter layer containing subsoil
of LVA and bovine manure was found to be superior to the substrate with subsoil of LVA and sewage sludge in the initial
development of A. mangium Willd in height and length of the root. Conditioners containing 90 to 100% of coconut fiber and
of 0 to 10% of aggregating residue provided better characteristics of growth of A. mangium Willd in field conditions.