The influence ofvermicomposts on plant growth and pest incidence

During the last twenty years, considerable progress has been made in developing methods of breaking down o~ganic wastes, including animal wastes, crop residues, urban and industrial organic refuse. and sewage biosolids;' which has been termed vermicomposting. Vermicomposts have a fine particulate structure, I.ow C:N ratio, with the organic matter oxidized and stabilized and converted into humic· materials. They contain nutrients transformed into plant-available forms and are extremely microbially-active. Additions of low rates of substitution of vermicomposts into greenhouse soil1\ess plant growth media or low application rates to field crops have consistently increased plant germination, growth, flowering, and fruiting, independent of nutrient availability; This can be at least partially, attributed to the production, by the greatly increased microbial pC'pulations, of plant growth regulators, including plant hormones, such as indole-acetic acid, gibberellins and cytokinins and also humic acids, which simulate the effects of hormones.

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