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http://dx.doi.org/10.17137/korrae.2017.25.3.79

Chages in pH, EC and Water Soluble Ions in the Rearing Beds of Eisenia andrei (Ennelida; Oligochaeta) in Relation to the Amount of Sludges Supplied to the Earthworm Populations  

Park, Kwang-Il (Department of Life Science and Chemistry, Daejin University)
Bae, Yoon-Hwan (Department of Life Science and Chemistry, Daejin University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.25, no.3, 2017 , pp. 79-89 More about this Journal
Abstract
Changes in pH, EC and water soluble cation and anion of the bed material in the rearing box of earthworms were investigated while sewage sludges or night soil sludge were cumulatively supplied to the 15 grams of initial earthworm population in the rearing box. Initial biochemical properties of sludges such as pH, EC, V.S. and water content were at the edible levels for earthworm. However, as the cumulative amount of sludges supplied to the earthworms were increased, pH of bed material in the rearing box was lowered and EC was increased, which meant that salt contents of bed material in the rearing box had been accumulated. Water soluble cations and anions were also accumulated in the bed material of the rearing box. Accumulation rates of ${NO_3}^-$ were especially prominent. Consequently, feeding rates of earthworm populations were reduced to nearly zero and earthworm populations finally died.
Keywords
Earthworm; Sludge; Water soluble ion; Rearing bed; Cation; Anion;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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