The quantities of carbon dioxide sent belowground can be expressed in “ barrels , ” the standard 42 - gallon unit of volume employed by the petroleum industry 二氧化碳送入地底的量可用桶为单位表示，这是石油业采用的标准容积单位，相当于159公升。
2.
The effects of fire on ecosystems are complex , ranging from the reduction or elimination of aboveground biomass to impacts on belowground physical , chemical and microbial mediated processes and fine root 火对生态系统的影响是复杂的，范围也很广，从减少地上部分生物量到对地下部分物理性质、化学性质、微生物降解过程和细根系的生长。
3.
The work on seasonal dynamics of litter input and decomposition and the relationship between them and environmental factors was studied through the method of harvest and weight loss . soil respiration rate was measured by alkali - absorption method and the contribution from soil microorganism respiration and from root respiration was determined through trendline method of linear regression between soil respiration rate and belowground biomass . mathematical models were established between the seasonal dynamics of main components of soil total respiration including soil respiration , root respiration , soil microorganism respiration , litter respiration and environmental factors 应用收获法和重量损失法对枯枝落叶输入与分解的季节动态及其与环境因子的关系进行了研究；应用静态气室法测定了土壤总呼吸和凋落物呼吸，应用土壤呼吸量与地下生物量线性回归趋势线法测定了土壤微生物呼吸及根呼吸的贡献量，运用相关分析法建立了土壤总呼吸、根呼吸、土壤微生物呼吸及其凋落物呼吸季节动态与环境因子之间的数学模型；应用灰色分析比较了两群落土壤呼吸季节动态产生差异的原因；应用干重换算法对土壤微生物能量积累量的季节动态进行了测定，建立了土壤微生物能量积累量与环境因子的数学模型；应用系统分析方法，利用分室模型，对两群落枯枝落叶与微生物之间的能量流动进行了定量测定和稳定性分析。
