BS 7755-4.4.2-1997 土质.生物法.污染物对微生物的影响.土壤微生物量的测定.熏烟萃取法

标准号：BS 7755-4.4.2-1997
中文标准名称：土质.生物法.污染物对微生物的影响.土壤微生物量的测定.熏烟萃取法
英文标准名称：Soil quality - Biological methods - Effects of pollutants on microbes - Determination of soil microbial mass - Fumigation-extraction method
标准类型：B10
发布日期：1997/5/15 12:00:00
实施日期：1997/5/15 12:00:00
中国标准分类号：B10
国际标准分类号：13.080.30
适用范围：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.