Crambe wastes vermicomposting in arugula seedlings production

Resumen

Crambe is a plant with high potential for biodiesel production. However, its use for animal nutrition poses toxicity. The aim of this study was to propose an alternative treatment for this type of agro-industrial waste. Thus, we used earthworm Eisenia foetida for the stabilization of crambe residue. Twenty vermireactors were constructed, receiving crambe waste and cattle manure in the dose according to the determination of total solids. Treatments were called 100 % of cattle manure; 10 % waste crambe + 90 % cattle manure; 20 % waste crambe + 80 % cattle manure; 30 % waste crambe + 70 % cattle manure; 40 % waste crambe + 60 % cattle manure. Mixtures remained for 40 days in vermireactors. The statistical design was completely randomized, with five treatments and four replications. The vermicompost obtained was used to produce arugula seedlings. At the end of the proposed period, it was observed that the worms survived in all crambe residue concentrations. Furthermore, it was found that even with the highest dose, crambe residue was not harmful worms. In the production of arugula seedlings, it was found that there was adequate development of plants.