Effect of Superphosphate as Additive on Nitrogen and Carbon Losses during Pig Manure Composting

Abstract:

A pilot scale experiment of composting in rotting boxes used pig manure with cornstalks was carried out to study the effects of superphosphate on nitrogen and carbon losses including gas emissions. Besides control, there were five amended treatments with superphosphate addition (counted by P content) at 0.05, 0.10, 0.15, 0.20 and 0.25 molar ratio of initial nitrogen. The results indicated that superphosphate addition decreased ammonia volatilization, total nitrogen and carbon losses in composting. Total nitrogen losses of superphosphate-amended treatments were reduced by 9.3%, 14.6%, 30.1%, 45.8% and 71.5%, respectively. About 0.8% to 1.2% of initial nitrogen lost in the form of N2O emission, and the CH4 emission accounted for less than 0.3% of initial carbon. More than 0.15 molar ratio of superphosphate in compost materials caused considerable adverse effects on degradation of organic matter.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 1675-1679
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.1675
• Online since: February 2013
• Authors: Yi Ming Luo, De Gang Xu, Guo Xue Li
• Keywords: Carbon Loss, Composting, Nitrogen Loss, Pig Manure, Superphosphate

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