生物量（菌体）浓度检测仪：利用光密度测量的方法，光密度(Optical density，OD ) 也称吸光度( Absorbence，A ) ，通俗地理解即吸收了多少光。OD = lg (入射光强度/ 透射光强度)，光密度越大，表示某种物质的含量越高，光密度是一个相当重要的光度学参数。
这种无脊椎动物以惊人的繁殖速度占领海洋，后分解为高浓度碳生物量，细菌难以有效吸收。
The invertebrates, populating the seas in ever-increasing numbers,break down into biomass with especially high levels of carbon, which thebacteria cannot absorb well.
本文从土壤微生物群落结构、微生物区系、土壤呼吸、微生物生物量以及土壤酶活性方面对大气高浓度CO2的响应进行了综述。
In this paper, the effects of elevated CO2 on soil microbial community structure, soil microflora, soil respiration, soil microbial biomass, and soil enzyme activities were summarized.
随着向土壤中添加磷浓度的增加，烟草生物量呈增加趋势。
The tobacco biomass increased with the increase of P concentration in the soil.
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