冻融循环期间土壤氧化亚氮排放影响因素
高德才, 白娥(
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Influencing factors of soil nitrous oxide emission during freeze-thaw cycles
GAO De-Cai, BAI E()
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图3. 冻融循环对土壤氧化亚氮(N2O)通量和N2O累积排放量的影响。这些变量被分成不同组, 包括年平均气温、试验方法、生态系统类型、土壤处理、植物的存在、采土时期、冻结温度以及土壤湿度。误差棒表示95%置信区间, 误差棒后面数值代表变量观察数。虚线表示效应值为0。
Fig. 3. Effects of freeze-thaw cycles on soil nitrous oxide (N2O) flux and cumulative N2O emissions. The variables are categorized into different groups according to mean annual temperature, experimental method, ecosystem type, soil treatment, presence of plant, period of sampling soil, temperature of freezing, and soil moisture. Error bars stand for 95% confidence intervals. The values next to the error bars represent the number of observations of the variable. Dashed line indicates that there is no effect. FT represents the freeze-thaw period.
