Changes in Phosphorus Fractions and Nitrogen Forms During Composting of Pig Manure with Rice Straw
| 第一作者： |
吕兑安 |
| 英文第一作者： |
Lu, D. A. |
| 联系作者： |
王莉霞 |
| 英文联系作者： |
Wang, L. X. |
| 发表年度： |
2013 |
| 卷： |
12 |
| 摘要： |
The study was conducted to reveal P fractions and N forms changing characters during composting of pig manure with rice straw. During composting, the NH4+-N concentration decreased and reached at a relatively low value (<400 mg kg(-1)) in the final compost, while the NO3--N concentration increased. Total N losses mainly occurred during thermophilic phase due to the high temperature, the high NH4+-N concentration and the increase of pH value. Labile inorganic P was dominated in the pig manure and initial compost mixture. During composting, the proportion of labile inorganic P of total extracted P decreased, while the proportion of Fe+Al-bound P, Ca+Mg-bound P and residual P increased. The evolutions of the proportion of labile inorganic P, Fe+Al-bound P and Ca+Mg-bound P were well correlated with the changes of pH value, organic matter and C/N ratio. Therefore, composting could increase the concentration of N and P and decrease the presence of NH4+-N and labile P fractions which might cause environmental issues following land application. |
| 刊物名称： |
Journal of Integrative Agriculture |
| 参与作者： |
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