標準號：BS 7755-4.4.2-1997
中文標準名稱：土質.生物法.污染物對微生物的影響.土壤微生物量的測定.熏煙萃取法
英文標準名稱：Soil quality - Biological methods - Effects of pollutants on microbes - Determination of soil microbial mass - Fumigation-extraction method
標準類型：B10
發布日期：1997/5/15 12:00:00
實施日期：1997/5/15 12:00:00
中國標準分類號：B10
國際標準分類號：13.080.30
適用范圍：This part of ISO 14240 specifies a method for the estimation of microbial biomass of soils by measurement of total extractable organic biomass material mainly from freshly killed microorganisms. The method is also applicable to the estimation of microbial nitrogen and microbial ninhydrin-reactive nitrogen in soil, but this part of ISO 14240 describes only the measurement of extractable organic carbon. The fumigation-extraction (FE) method is applicable to aerobic and anaerobic (water-logged, paddy) soils over the whole range of soil pH. Biomass can be also measured in soils containing actively decomposing substrates and soils supersaturated with potassium sulfate solution. NOTE —Chloroform fumigation also affects soil fauna. The contribution of carbon from these organisms is generally small (< 5 %) and can usually be neglected.