Primary Research on Characteristics of Zinc Accumulation of Different Pig-on-litters
In order to study zinc accumulation and activity in different fermentation mattresses and topsoil, three combinations of fermentation beds were selected: 40% rice husk+ 60% mushroom bran(FJ)、40% rice husk+ 60% sawdust(FD)、40% rice husk+ 60% vinasse(FW),to save economic costs and be suitable for pig...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Agro-Environmental Protection Institute, Ministry of Agriculture
2014-02-01
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| Series: | Journal of Agricultural Resources and Environment |
| Subjects: | |
| Online Access: | http://www.aed.org.cn/nyzyyhjxb/html/2014/1/20140108.htm |
| Summary: | In order to study zinc accumulation and activity in different fermentation mattresses and topsoil, three combinations of fermentation beds were selected: 40% rice husk+ 60% mushroom bran(FJ)、40% rice husk+ 60% sawdust(FD)、40% rice husk+ 60% vinasse(FW),to save economic costs and be suitable for pig growth. Two methods named material flow analysis(MFA)and potential ecological risk assessment were used in this study. The results showed that, after one breeding cycle, the combination of FD had stronger ability to absorb heavy mental Zn; different litters had different effects on the activity of available Zn, thus in the litter of FD, the Zn activity was significantly higher than the other two, the proportion as high as 25.01%, followed by the FJFW(P<0.05). To the contrary, there were no significant impacts on available Zn activity(P>0.05)in different topsoil. In the selected three litters, the absorptive capacity for Zn of FJ was smallest; meanwhile,the total Zn leaked into topsoil and the effective activity of Zn had no significant differences from FD and FW. However, its potential ecological risk was minimization. For the reason to reduce Zn contamination, the litter of FJ was better than the other two. After analysis of ecological risk assessment, the potential ecological risk of these three litters didn't exceed the minimal ecological risk threshold(Ei r≤40). The useful life of the fermentation bed should be about ten years in the premise of constantly replenished litter. |
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| ISSN: | 2095-6819 2095-6819 |