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对草原土壤N2O释放及其受全球变暖土壤养分变化的影响研究表明,以沼泽泥炭土N2O释放量最大,生长季节为13~12.2kgN·hm-2·a-1,其次灰壤土,为1.5~2.4kgN·hm-2·a-1,酸性棕壤最小,为0~3.2kgN·hm-2·a-1;N2O的释放层灰壤土在0~5cm,其它2种土壤为0~10cm;施肥试验表明,N、P肥在生长季节对土壤N2O释放量影响不显著,但在生长季末期,N肥对酸性棕壤及灰壤土N2O影响显著,施肥后第3天酸性棕壤由对照的1.3提高到44.2kgN·hm-2·a-1,灰壤土则由对照的1.9提高到31.1kgN·hm-2·a-1,说明全球变暖对土壤有机质分解的影响不会诱发N2O释放量的大幅度增加.
The results showed that N2O released from marsh peat soil was the largest, with the growth season being 13 ~ 12.2kgN · hm-2 · a-1, followed by gray loam 1.5-2.4kgN · hm-2 · a-1, with the smallest amount of acidic brown soil, ranging from 0 to 3.2kgN · hm-2 · a-1. Soil fertility test showed that N and P fertilizer had no significant effect on soil N2O release during the growing season. However, N fertilizers had a significant effect on N2O in acidic and calcareous soil at the end of the growing season. After fertilization for 3 days Acid brown soil increased from control 1.3 to 44.2kgN · hm-2 · a-1 and gray soil increased from 1.9 to 31.1kgN · hm-2 · a-1, indicating that global warming The effect on soil organic matter decomposition does not induce a substantial increase in N2O emissions.