Effect of urea fertilizer on the vitality of the earthworm Octolasion cyanieum

Abstract

This study was conducted to find out the effect of rearing earthworms O. cyanieum in soil treated with concentrations (100, 250, 500 and 1000 mg / kg) for a period of (7, 14, 21 and 28 days) of rearing, as urea fertilizer had a significant effect on all activities The vital activity measured in the experiment, all worms died at a concentration of 1000 mg/kg after 7 days. There was also a decrease in weight, reaching the highest drop of 0.475 g, and the relative growth rate was 64.62% at a concentration of 500 mg/kg after 28 days. Also, the amount of protein content in the body of worms decreased with increasing concentrations.