title: Evaluation of medical stone amendment for the reduction of nitrogen loss and bioavailability of heavy metals during pig manure composting.
abstract: The purpose of this research was to evaluate the effect of medical stone (MS) on nitrogen conservation and improving the compost quality during the pig manure (PM) composting. Five treatments were designed with different concentrations of MS0%, 2.5%, 5%, 7.5% and 10% (on dry weight of pig manure basis) mixed with initial feed stock and then composted for 60days. The results showed that MS amendment obviously (p<0.05) promoted the organic waste degradation and prolonged the thermophilic phase as well as enhanced the immobilization of heavy metals Cu and Zn. With increasing the amount of MS, the NH3 loss and N2O emission were significantly reduced by 27.9-48.8% and by 46.6-85.3%, respectively. Meanwhile, the MS amendment could reduce the NO2(-)-N formation and increase the NO3(-)-N content. Finally our results suggested that 10%MS addition could significantly reduce the nitrogen conservation as well as improve the quality of compost.
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Quan
authors: Q
authors: Wang
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Zhen
authors: Z
authors: Wang
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China; Department of Biotechnology, Amicable Knowledge Solution University, Satna, India.
authors: Mukesh Kumar
authors: MK
authors: Awasthi
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Yahui
authors: Y
authors: Jiang
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Ronghua
authors: R
authors: Li
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Xiuna
authors: X
authors: Ren
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Junchao
authors: J
authors: Zhao
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Feng
authors: F
authors: Shen
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China.
authors: Meijing
authors: M
authors: Wang
authors: College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, PR China. Electronic address: zhangzq58@126.com.
authors: Zengqiang
authors: Z
authors: Zhang
mesh_terms: D000641:Ammonia / Q000737:chemistry; D000818:Animals; D001682:Biological Availability; D008372:Manure; D019216:Metals, Heavy / Q000737:chemistry / Q000493:pharmacokinetics*; D008903:Minerals / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry*; D009609:Nitrous Oxide / Q000737:chemistry; D012987:Soil; D034421:Sus scrofa; D013552:Swine; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D008372:Manure; D019216:Metals, Heavy; D008903:Minerals; D009566:Nitrates; D012987:Soil; D000641:Ammonia; D009609:Nitrous Oxide; D009584:Nitrogen
keywords: Compost; Heavy metals; Medical stone; Nitrogen conservation; Pig manure