To study the effects of superphosphate( SP) on the NH3 and greenhouse gas emissions,vegetable waste composting was performed for 27 days using 6 different treatments. In addition to the controls,five vegetable waste mixtures( 0. 77 m3each) were treated with different amounts of the SP additive,namely,5%,10%,15%,20% and 25%. The ammonia volatilization loss and greenhouse gas emissions were measured during composting. Results indicated that the SP additive signi-ficantly decreased the ammonia volatilization a...