The main factors that affect the availability of Pb in soil are the total amount of Pb, soil nature, soil microbial, and plants growing on the soil, etc.
影响土壤铅的植物有效性的因素包括土壤铅全量、土壤理化性质、土壤微生物、高等植物等。
Soil microbial total DNA could not be obtained through DNA gel extraction kit after purification with 1% Sepharose containing 2% of PVP (polyvinylpyrrolidone) agarose gel electrophoresis.
含2 %PVP的1 %琼脂糖凝胶电泳纯化，用DNA凝胶回收试剂盒回收后没有得到纯化后的土壤微生物总DNA。
Objective To apply the microbial transformation to transforming the total saponins in the fruit of Panax ginseng (SFPG) and preparing ginsenoside compound K (C-K).
目的利用微生物转化法对人参果总皂苷（SFPG）进行生物转化，制备人参皂苷化合物K（C-K）。
A total of 1 600 microbial fermentation samples were screened with this model, among which 56 positive strains were found, with a positive rate of 3.5%.
累计应用此模型筛选放线菌和真菌发酵液样品1 600个，其中获得阳性菌株56个，阳性率约为3.5％。
Results showed that there were no significant differences in soil total organic carbon, soil moisture content, pH and soil microbial biomass phosphorus in each soil layer between the two plantations.
结果表明，在各个土层中，两种林分下的土壤含水量、pH值、有机碳的含量以及微生物生物量磷均无显著差异。
The results showed that all the 4 species of plants improve greatly the organic C and total N in soil with microbial biomass accumulated much more and soil enzyme activity improved.
结果表明，4种固沙植物均能明显改善土壤C，N水平，提高微生物生物量，改善土壤酶的活性。
The results showed that all the 4 species of plants improve greatly the organic C and total N in soil with microbial biomass accumulated much more and soil enzyme activity improved.
结果表明，4种固沙植物均能明显改善土壤C，N水平，提高微生物生物量，改善土壤酶的活性。
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