Investigating vermicompost production from agricultural waste and sheep manure

Vermicomposting is a promising, cost-effective, and environmentally friendly technology in organic waste management. In this study, the production of vermicompost by Eisenia Foetida earthworm from agricultural residues and sheep manure has been discussed.

In this study, sheep manure, straw and grape leaves wastes were used in different proportions to produce vermicompost. Perforated plastic boxes were used to support the growth of earthworms. After adjusted different proportions of these residues, their humidity was controlled and a number of earthworms of Eisenia Foetida species were introduced to each box. The pH and EC parameters were measured every two weeks and C/N ratio three times during the experiment. The duration of experiment was 120 days. The ANOVA test was used to compare the averages and Tukey and Kruskal-Wallis post-tests were also used to identify the source of differences in the mentioned variables.

The results showed that the pH increased during vermicomposting process and was acidic again at the end of the process. The highest C/N decrease ratio and the highest EC increase were observed in the 100% sheep manure bed (b1) and the lowest C/N decrease was observed in the 100% straw bed (b6).

Using vermicomposting is effective in waste management. It is recommended to use sheep manure in combination with other wastes to produce high quality fertilizer as well as increase the rate of vermicomposting process.