呼吸商(respiration quotient,qCO2),传统上称代谢商(metabolic quotient), 是基础呼吸与微生物生物量-C间的比率(CBR//Cbio),即每单位微生物生物量-C的基础 呼吸率。
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Although the response of microbial metabolic quotient（MMQ） to Cd was different among soil types or incubation periods,it was generally greater at low Cd loading(4-16 mg kg-1)for different incubated time in the three soils.
不同土壤的微生物代谢熵在不同的培养时期对镉的响应趋势存在差异,低浓度镉(4-16mgkg-1)对三种土壤不同培养时期的微生物代谢熵都有促进作用,长时间镉胁迫下(16周,＞16mg kg-1),红黄壤和青紫泥的微生物代谢熵低于对照。
参考来源 - 蔬菜系统镉污染的土壤化学与生物学响应及蔬菜安全诊断Metabolic quotient dropped markedly compared to slope cropland at the early stage but gradually improved with the increase of years,15 years later,tended to be stable.
代谢商在改造初期显著低于坡耕地,随后逐渐升高,15年后趋于稳定,和坡耕地没有显著差异。
参考来源 - 黄土丘陵区营造果园后土壤质量效应分析·2,447,543篇论文数据，部分数据来源于NoteExpress
Soil metabolic quotient were changed with different incubated time.
土壤代谢商随培养时间延长变化趋势不同。
Soil basal respiration, soil biomass carbon, metabolic quotient are important indexes of soil microbiological, they relate to physical-chemical character of soil.
土壤微生物量碳、基础呼吸作用、土壤代谢商是表征土壤质量的重要指标，并且与土壤本身的理化性质有关。
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