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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (2): 296-302.doi: 10.11924/j.issn.1000-6850.2011-1967

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

水葫芦堆肥中N2O排放特征及其影响因子研究

王海候 沈明星 常志州 陆长婴 陈凤生 施林林 宋浩   

  • 收稿日期:2011-07-05 修回日期:2011-08-10 出版日期:2012-01-15 发布日期:2012-01-15
  • 基金资助:

    科技部支撑计划;江苏省农业科技自主创新资金项目;苏州市应用基础项目;苏州市社会发展项目

Study on Characteristics of N2O Accumulative Emission and Its Influencing Factors in the Composting of Water Hyacinth

  • Received:2011-07-05 Revised:2011-08-10 Online:2012-01-15 Published:2012-01-15

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摘要：

为了明确水葫芦堆肥过程N2O排放的影响因子，为减少水葫芦堆肥过程中N2O排放提供理论依据，笔者采用静态箱-气相色谱法，研究水葫芦（Eichhornia crassipes）堆肥过程中N2O排放动态，探讨了堆温、C/N、氮素形态、化学保氮剂、翻堆频次对N2O排放量的影响。结果表明：N2O日均排放量在水葫芦堆肥后5~10天达最大值，N2O累积排放量呈对数曲线变化趋势；N2O日均排放量与堆温、NH4+-N含量成极显著线性正相关，降低堆温、增加C/N比，可以减少水葫芦堆肥过程中N2O排放量；添加化学保氮剂处理，可以降低水葫芦堆肥过程0~8天的N2O排放量，但整个堆肥过程的N2O累积排放量大于对照处理；减少翻堆频次可降低N2O的排放。

关键词: 高州普通野生稻, 高州普通野生稻, 雄性不育细胞质, 杂种一代, 单株产量

Abstract:

In order to clarify the characteristics of N2O accumulative emission and its influencing factors, and it will provide the techniques for reducing N2O accumulative emission in the composting of water hyacinth (Eichhornia crassipes). Composting is the common method in handling and using the harvested water hyacinth. However, few studies have been focused on greenhouse gas released from the composting. The objectives of this paper were to study the dynamics of nitrous oxide (N2O) emission and the effects of different influencing factors such as composting temperature, carbon and nitrogen ratio(C/N), nitrogen forms, ammonia-fixing synergist, and pile-turning frequency on N2O accumulative emission in the composting of hyacinth by using the static chamber-GC theory with manual method. The results showed that N2O daily mean emission reached a maximum during the fifth to tenth days, the N2O accumulative emission can be fitted into regression model; N2O daily mean emission were both significantly positive linear correlation to composting temperature and ammonium nitrogen (NH4+-N) content, lowering the pile temperature and increasing the C/N could decrease the N2O accumulative emission in the composting of hyacinth. Adding ammonia-fixing synergist could decrease the N2O emission during the first 8 days of composting, while the whole N2O accumulative emission treated with ammonia-fixing synergist was more than the control group. Reducing the pile-turning frequency can decrease the N2O emission.