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

Soil quality - Biological methods - Effects of pollutants on microbes - Determination of soil microbial mass - Fumigation-extraction method

BS 7755-4.4.2-1997 发布历史

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.

BS 7755-4.4.2-1997由英国标准学会 GB-BSI 发布于 1997-05-15，并于 1997-05-15 实施。

BS 7755-4.4.2-1997 在中国标准分类中归属于: B10 土壤、肥料综合，在国际标准分类中归属于: 13.080.30 土壤的生物特性。

BS 7755-4.4.2-1997的历代版本如下：

• 1997年05月15日 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

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标准号

BS 7755-4.4.2-1997

发布日期

1997年05月15日

实施日期

1997年05月15日

废止日期

无

中国标准分类号

B10

国际标准分类号

13.080.30

发布单位

GB-BSI

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.