| 2 | Nitrogen transformations during pig manure composting显示文摘Composting is now suggested as one of the environmentally and friendly alternative method for disposal of solid organic wastes, as it leads to minimization, stabilization, and utilization of organic waste. Transformations of nitrogen were investigated in co composting of pig manure with different amendments, such as sawdust and leaves. Samples were analyzed for pH, total N, soluble NH 4 N, soluble NO 3 N and soluble organic N. The total N increased after 63 days of composting, as well as the soluble NO 3 N and soluble organic N. Soluble NH 4 N increased significantly and showed peak values at day 7, thereafter decreased sharply and gradually to lower levels. Seed germination index (GI) showed that co composting of pig manure with sawdust reached maturity after 49 days of composting, while co composting of pig manure with sawdust and leaves required shorter time for 35 days. Soluble NH 4 N was significantly negatively ( P <0.05), while soluble NO 3 N and soluble organic N were significantly positively ( P <0.05), correlated with seed germination index (GI). Addition of leaves in co composting of pig manure with sawdust had no significant impacts on nitrogen transformations, but it was beneficial for maturity of pig manure compost. | HUANG Guo-feng WU Qi-tang LI Fang-bai WONG J.W.C | 2001 | Journal of Environmental Sciences2001，13，4： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员