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http://dx.doi.org/10.17137/Korrae.2014.22.1.57

Effects of Mixing Ratios of Cow Manure and Composting Bulking Agent on Physico-Chemical Characteristics and Earthworm (Eisenia foetida) Survival  

Hwangbo, Soon (Department of Animal Resources, Daegu University)
Jo, Ik-Hwan (Department of Animal Resources, Daegu University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.22, no.1, 2014 , pp. 57-66 More about this Journal
Abstract
The present study was conducted to provide basic data for environmentally friendly treatment of manure using vermicomposting. This was done by investigating the influence of physiochemical property change during the composting period on the survival of earthworms after mixing cow manure in different levels (0(CRH0), 10(CRH10), 20(CRH20), 30(CRH30), and 40%(CRH40)) with the rice hull that is generally added for composting manure. As composting proceeds, earthworms were able to survive in all conditions after 3 weeks. In terms of the C/N ratio by treatment groups, the rice hull mix treatments were significantly higher than the CRH0 treatment. Among rice hull mix treatments, the treatments with 30~40% rice hull level (CRH30 & CRH40) showed the highest ratio out of all composting periods (p<0.05). The C/N ratio in the 3rdweek when earthworms started surviving was 23.26~34.44. As composting progressed, pH and electrolytic conductivity (EC) were the highest in the CRH0 treatment (p<0.05) and tended to decrease with higher proportion of rice hull in the mix. It was found that pH and electrolytic conductivity (EC) that earthworms start to survive are 7.58~7.74 and 0.41~1.17 mS/cm, respectively. To summarize, when composing cow manure with various levels of rice hull mix, all physiochemical property changes turned out to allow the survival of earthworms, but the results suggest that efficient vermicomposting requires the tests to examine the growth and reproduction according to the rice hull mix ratio.
Keywords
cow manure; bulking agent; earthworm; vermicomposting; C/N ratio;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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