| 施用不同污泥堆肥品对土壤温室气体排放的影响 |
| 摘要点击 1930 全文点击 721 投稿时间：2016-06-11 修订日期：2016-10-31 |
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| 中文关键词 污泥堆肥品 土壤 温室气体 排放特征 生物质炭 |
| 英文关键词 sludge compost product soil greenhouse gas emission characteristics biochar |
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| 中文摘要 |
| 通过田间试验，分别施加两种不同的污泥堆肥品（A：含生物质炭堆肥品，B：不含生物质炭堆肥品）和不同施肥量，分析土壤CO2、CH4和N2O动态变化特征和排放系数，研究施用污泥堆肥品对土壤温室气体排放的影响.结果表明，土壤CO2和CH4排放主要集中在生长期，生物质炭堆肥品低施用量能减少CO2排放，而高施肥量增加CO2排放.CH4排放主要为负值，总体表现为土壤吸收CH4，对照处理吸收量远高于其他处理（P<0.01），A组处理CH4吸收量随施肥量的增加而增加（P<0.05）.N2O排放集中在发芽期和幼苗期，施肥量越高，排放量越大（P<0.01）.污泥堆肥品农用过程排放的温室气体主要是N2O，施用A、B两种污泥堆肥品的土壤N2O排放系数分别为1.02%~1.90%和1.28%~2.93%.生物质炭堆肥品具有显著的碳减排效果，其温室气体排放量比不含生物质炭堆肥品的土壤低19.49%~35.56%，且对于N2O的减排效果较CH4更为显著. |
| 英文摘要 |
| Effect of application of sewage sludge compost on the emission of greenhouse gas from soil was investigated by analyzing the dynamic characteristics and emission factor of CO2, CH4 and N2O in soil after spiking two different composts (A:compost with biochar, B:compost without biochar) with varying fertilizing amount into soil. The results indicated that emissions of CO2 and CH4 mainly occurred in the plant growth period with low fertilizer amount of biomass charcoal compost reducing CO2 emissions, and high application content increasing CO2 emissions. CH4 emission fluxes showed negative values, indicating that soil could adsorb CH4, and the adsorbing amount for control was significantly higher than those for other treatments (P<0.01). The absorbing amount in treatment A increased with the fertilizing amount (P<0.05). N2O emissions mainly occurred at the germination and seedling stages, and emission fluxes increased with the fertilizing amount (P<0.01). N2O was considered as the main generated greenhouse gas during agricultural process with sludge compost, and its emission factor from sludge compost soil was 1.02%-1.90% (A compost) and 1.28%-2.93% (B compost), respectively. Biochar could significantly reduce the carbon emission, as the total greenhouse gas released from soil with biochar compost was 19.49% to 35.56% less than that in soil without biochar, which was more obvious for N2O emission reduction (compared with CH4 mitigation). |
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