Resumo

LUNA FONTALVO, JORGE ALBERTO; CORDOBA LOPEZ, LAURA SOFÍA; GIL PERTUZ, KARINA ISABEL  e  ROMERO BORJA, ISAAC MANUEL. Effect of Agroforestry Residues Partially Biodegraded by Pleurotus Ostreatus (Pleurotaceae) on Tomato Seedlings Development. Acta biol.Colomb. [online]. 2013, vol.18, n.2, pp.365-374. ISSN 0120-548X.

It was evaluated the development of tomato seedlings (plant bioindicator of toxicity) in soils with sawdust and rice husk partially biodegraded by Pleurotus Ostreatus in greenhouse conditions. Both organic compounds (carbon, cellulose, lignin, extractives, and organic matter), and inorganic compounds (nitrogen, phosphorus and pH) were determined, before and after fungus inoculation on sawdust and rice husk. Mixtures were held of each substrate with a nutrient poor soil in equal proportions (1:1) and the moisture content was determined. The experiment consisted of a completely randomized, with two groups of six treatments for each substrate, and 30 days later, parameters of growth and development were identified. Biodegraded substrates presented low C, N and P. BSA + SF treatment (biodegraded sawdust + fertilized soil) presented the best results in the number of leaves (12.9), plant height (25.94 cm), root length (5.92 cm), dry weight (0.138 g), and fresh weight (1.012 g). BSA + SF substrate can work as favorable substrate for growing tomato seedlings, BSA + SF substrate can work as favorable substrate for growing of tomato seedlings, since it provides the nutrients necessary for a good growth. Plants in rice bran did not grow adequately for transplanting.

Palavras-chave : Lycopersicum esculentum; nutrients; sawdust; rice husks.

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