Changes in Phosphorus Fractions and Nitrogen Forms During Composting of Pig Manure with Rice Straw

LÜ Dui-an; YAN Bai-xing; WANG Li-xia; DENG Zhi-qiang; ZHANG Yu-bin

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Changes in Phosphorus Fractions and Nitrogen Forms During Composting of Pig Manure with Rice Straw

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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 ifnal 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.

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《农业科学学报（英文版）》 |2013年第10期|1855-1864|共10页
作者
LÜ Dui-an; YAN Bai-xing; WANG Li-xia; DENG Zhi-qiang; ZHANG Yu-bin;
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作者单位

Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, P.R.China;

Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, P.R.China;

Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, P.R.China;

Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, P.R.China;

College of Plant Science, Jilin University, Changchun 130062, P.R.China;

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Changes in Phosphorus Fractions and Nitrogen Forms During Composting of Pig Manure with Rice Straw

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