Irrigation with wastewater on a Canavalia ensiformis cultivation in substrate treated with coffee dregs vermicompost
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Data
2015
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Resumo
Taking into account the necessity of creating alternatives to minimize the environmental impacts caused by
solid and liquid residues, this study aimed at examining the feasibility of Canavalia ensiformis (jack bean)
cultivation in substrates treated with coffee dregs vermicompost and fertirrigated with wastewater. Initially, the
vermicompost was prepared using Eisenia foetida worms and different percentages of coffee dregs. To study
the C. ensiformis development, experimental units were established, organized in a completely randomized
design, with four treatments and eight repetitions. The following parameters were obtained: average number of
leaves per plant; height of the aerial part; fresh and dry phytomass of aerial parts and roots, and length of roots.
Chemical analyses of irrigation water and cultivation soil were carried out. The results showed that the
substrates treated with a compost made of 25% coffee dregs and 75% cattle manure provided the most
favorable conditions for E. foetida to grow, and it is suggested as an alternative to vermicomposting. The
groups cultivated with the application of coffee dregs vermicompost and irrigated with wastewater presented
the best results in terms of the variables chosen to assess plant development. This has possibly resulted from
the higher concentrations of N, P and K present in the wastewater and in the substrate treated with the coffee
dregs vermicompost. This study points to the potential use of irrigation with wastewater, combined with a
substrate treated with coffee dregs vermicompost, in C. ensiformis cultivation.
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Eisenia foetida, Jack bean, Residues, Water reuse, Eisenia foetida, Resíduos, Feijão de porco, Reuso da água
Citação
MALAFAIA, Guilherme; RODRIGUES, Ronaldo Ferreira; ARAÚJO, Fernando Godinho; FERNANDES, Eliana Paula; LEANDRO, Wilson Mozena ; RODRIGUES, Aline Sueli de Lima. Irrigation with wastewater on a Canavalia ensiformis cultivation in substrate treated with coffee dregs vermicompost. Científica, Jaboticabal, v. 43, n. 2, p. 188-196, 2015.