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| Effect of Bio-bed Pig Raising on Heavy Metal Contents in Soil |
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| KeyWord:bio-bed pig raising; bio-bed material; soil; traditional pig raising; heavy metal |
| Author Name | Affiliation | | LI Mai-jun | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127，China | | MA Han | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127，China | | GUO Hai-ning | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127，China | | WANG Xiao-zhi | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127，China | | FENG Ke | College of Environmental Science and Engineering, Yangzhou University, Jiangsu 225127，China | | GU Hong-ru | Institute of Animal Science, Jiangsu Academy of Agricultural Sciences, Nanjing 210014，China |
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| Abstract: |
| Pig raising has caused heavy metal contamination in soil. A study was performed to determine the effects of bio-bed pig raising on heavy metal contents in bio-bed materials at different stages, in soil under the bio-bed, and in soil out of bio-bed, using soil from the traditional pig raising in the same location as reference. After 5 months of pig raising, accumulation of heavy metals in bio-bed layer（0~40 cm）was obvious. The increments of Cu, Zn, Cr and Pb contents were 41.23, 51.73, 13.52 mg·kg-1 and 5.23 mg·kg-1, respectively. Soil Cr content was found to increase by 14.30 mg·kg-1 even in 40~80 cm underneath the bio-bed. The accumulation of Cu, Zn and Cr in the soil of traditional pig raising was 22.77, 41.83 mg·kg-1 and 5.50 mg·kg-1, respectively, higher than that in the soil out of the bio-bed. The data in this study indicate that bio-bed pig raising may have lower risk of heavy metal pollution to the surrounding soils than traditional one. |
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