Distribution of earthworms and theirs relation with some soil properties
2009
Kooch, Y., M.Sc. Student of Forestry | Jalilvand, H., Assistant Professor | Bahmnyar, M.A., Associate Professor; Faculty of Natural Resources, High Education Composed of Agriculture Sciences and Natural Resources, Mazandaran University | Pormajidian, M.R., Mazandaran University.
Earthworms are the most important members of soil detritivores in temperate forests. Density and biomass of earthworms were studied in ecosystem unit_s Khanikan forests. Ecosystem units were determined and then, 18 soil profiles (50×50cm) to the depth of 30cm were taken. Soil samples were selected from organic horizon (litter layer), and mineral layers (0-10, 10-20, and 20-30cm). Earthworms were collected by hand sorting method, then oven _ dried at 60˚C. Results showed that the most number was in third layer (63.63%) and the least number was in second layer (13.63%). Also, biomass of earthworms in third layer was the most (79.39%) and was the least in second layer (7.57%). Result of this research indicated that correlation between number and biomass of earthworms with C/N, biomass of earthworms with carbon of soil and number of earthworms with theirs biomass were significant.
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