2.2. Measurement of Microbial Biomass Nitrogen (MBN) and Extracellular Enzyme Activities

YJ Yinghua Juan
NJ Nan Jiang
LT Lulu Tian
XC Xiaodong Chen
WS Wentao Sun
LC Lijun Chen
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Soil MBN was measured using the chloroform-fumigation extraction method [21]. Protease activity (PA) and nitrate reductase activity (NRA) in the soil were measured according to the method of Kandeler, using potassium nitrate and tyrosine as the substrates, respectively [22].

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