生物量

The volume productivity of the dominant populations increased differently, for example, the growth rates of Schima superba, and Cyclobalanopsis glauca are 4.83 percent, and 5.16 percent, while that of Liquidambar formosana is only 0.29 per cent, which embody the high competitive ability of every green tree species.

而人工林的物种多样性低，群落结构简单，系统生物量最低，土壤营养元素含量呈下降趋势，应该进行合理管护以提高人工林的系统维持能力和生态防护能力。

The reason is that there were more rainfall and smaller evaporation, and the environment was suit able for the growth of liquorice in 2006, so the density of liquorice is higher.

3通过逻辑斯蒂增长模型的分析得出，不同水分处理对甘草植株的高度、枝条数、单叶叶面积，叶片数量以及地上生物量都有很大的影响。

The result showed that the biomass of root, stem and leaves of Quercus virginiana were reduced with the increase of salinity and the decline of dry weight of stem and leaves was greater than that of root, which indicated that the aboveground of live oak was more sensitive to salt than the underground which lead to the increase of root-shoot ratio.

结果发现，在经过不同质量质量浓度NaCl处理21d后，随着NaCl质量质量浓度的增加，弗栎植株生长受到抑制，其中茎叶生物量减少的幅度较根系大，表明弗栎地上部生长比地下部对盐胁迫更加敏感，从而导致根冠比增加。

Ammonifiers in Suzhou Creek can not use inorganic nitrogen and carbamide as nitrogen source; additional carbon source and garbage lixivium have little influence on ammonifiers growth; high content of salt and low temperature restrain ammonifiers growth; alkalescent condition has little influence on ammonifiers, but acidic condition restrain ammonifiers growth; the biomass of ammonifiers are not necessary correlated with the function of ammonifiers, adding glucose with 1g/l content into the water sample obviously promote the growth and function of ammonifiers.

苏州河的氨化菌无法利用无机氮和尿素作为氮源；在营养条件充足时添加额外C源和富含有机物的垃圾浸出液对氨化菌的生长基本无影响；高盐度和低温抑制氨化菌生长；碱性条件对氨化菌的生长影响不大，酸性条件对氨化菌生长具有抑制作用；氨化菌生物量的消长与转氨活性之间不存在必然联系，1g/L的葡萄糖对苏州河水样中氨化菌的数量和转氨功能具有明显的促进作用。

The regression analysis confirmed that the plant′s growth patterns all fit a logistic curve.

实验期间，菹草生物量变化的回归分析表明，不同透明度下菹草的生长均符合逻辑斯谛曲线。

The ecological type structure and biomass structure of community had lower variation and didn't change dramatically with the loss of species.

群落的生态类型结构和生物量结构具有相对的稳定性，并不因某些物种的丢失而发生明显的改变。

Soil organic carbon dynamics can be reflected to some extent by the soil quality magnetic susceptibility and root content.

土壤磁化率、根生物量在一定程度上可以反映土壤有机碳动力学过程。

There was a peak value during spring and summer in mean density and biomass of macrozoobenthos.

底栖动物密度和生物量在春夏之交有一高峰。

The main results are as follows: 1. From the specimens we observed 5 phyla 53 genus 106 species of phytoplankton. The mean density and biomass of phytoplankton are 80.954xl04 ind/L and 0.567 mg/L.

结果如下： 1。样品中共检出浮游植物5门53属106种，浮游植物的平均密度和生物量分别为80.954×10~4 ind／L和0.567 mg／L。

Taking Wuliangsuhai Lake,which is a typical shallow weedy lake lies in Hetao irrigate district in the north of China,as a research object,combining the measured water quality data with the spatial data,using the method of Principal Components Analysis based on factor analysis,the water quality parameters of WL are summarized into seven principal components,namely the index ...

以位于我国北方的河套灌区中的草型浅水湖泊乌梁素海为研究对象，将实测的湖泊水质监测数据与空间数据结合，采用基于因子分析的主成分方法将乌梁素海的水质参数概括为7个主成分，即：富营养化特征指标、湖泊盐化特征指标、湖泊有机物污染指标、湖泊形态特征指标、水体酸碱指标、水体藻类生物量指标、植物生长环境指标。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。