| 放牧对草原土壤N2O产生及微生物的影响 |
| 摘要点击 2405 全文点击 1791 投稿时间：2000-10-17 |
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| 中文关键词 乙炔抑制法 放牧 内蒙古羊草草原土壤 N2O通量 异养硝化作用 |
| 英文关键词 acetylene inhibition method grazing Inner Mongolia Aneurolepidium chinense grassland soil N2O flux heterotrophic nitrification |
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| 中文摘要 |
| 利用AIM乙炔抑制法,首次测试了我国内蒙古放牧和非放牧羊草草原土壤N2O产生的微生物过程;通过分析不同类型草原土壤N2O产生的微生物过程和相关微生物菌群的季节变化,研究了放牧行为对于草原土壤N2O微生物产生过程的影响.放牧行为改变了土壤结构,有利于土壤微生物反硝化作用的发生,在一定程度上降低了草原土壤N2O的排放.揭示了内蒙古草原土壤N2O产生是以异养硝化作用过程为主的微生物过程,解释了内蒙古典型草原土壤N2O通量较低和其季节变化的微生物学机理. |
| 英文摘要 |
| A laboratory incubation study on effect of grazing on microbiological processes of N2O production in Aneurolepidium chinense grassland soils by using the acetylene inhibition method was firstly conducted and the seasonal variations of related bacteria groups and N2O fluxes were analyzed. Results suggested that grazing behavior altered the soil structure which were benefit to microbiological denitrification so that N2O emission from this steppe soil was reduced. It was the heterotrophic nitrification that is the key microbiological process for N2O production in the non grazing and grazing semi arid typical grassland soils in Inner Mongolia. The reasons why N2O flux from Inner Mongolia semi arid typical grassland soils was lower were also explained in this paper. |
