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Effects of boron on the growth, nutrition quality and nitrogen-fixing ability were studied in Chamaecrista rotundifolia. Compared with control,the branching numbers, root and shoot biomass of C.

设立田间小区试验，探讨在红壤中施用不同浓度的硼肥对圆叶决明植株生长、牧草品质和根瘤固氮能力的影响。

Phytoplankton biomass increase coincided with the decrease in large Cladocera density and size.

浮游植物的生物量增长与大型枝角类密度和体型下降相一致。

One pond lacking submerged macrophytes could maintain very low phytoplankton biomass owing to large Cladocera grazing alone.

在一个缺乏大型沉水植被的池塘可能会维持较低的浮游植物生物量由于大型枝角类的单一摄食。

Response surface methodology based on a three-level three-factor Box-Behnken design of experiment was used to optimize the exopolysaccharide content and the mycelium biomass in submerged cultivation by Clitocybe sp.

在Plackett-Burman试验设计结果基础上，采用Box-Behnken响应曲面法(response surface methodology， RSM)对影响杯伞Clitocybe sp。

It is shown from the assessment results that (1) both the TN and TP fluxes discharged from the Changjiang River to the Changjiang River estuary sea area increased continuedly, the DIN concentration in the sea areas increased continuedly, and the Si concentration decreased continuedly, which resulted in the significant changes in N/P/Si ratios;(2) the chlorophyll a concentration in the sea areas increased continuedly, and the significant changes in community structure of phytoplankton occurred;(3) the species and biomass of benthos declined greatly, and the bottom oxygen-poor water area increased significantly;(4) the range and occurrence frequency of red tide events in the sea areas increased greatly, and the algal toxic infection events of mussel were frequently found in the sea areas.

结果表明，长江向长江口海域输送总氮和总磷通量持续增大，长江口及其邻近海域无机氮浓度持续增高而硅浓度持续下降，并由此导致N/P/Si与比值的显著变化；该海域叶绿素a浓度持续增大，浮游植物群落结构也发生了显著变化；该海域底栖生物种类和生物量都大大减少，底层水低氧区面积也显著扩大；该海域赤潮事件无论是规模还是频率都大大增加，藻类毒素DSP/PSP贻贝传染事件也时有发生。

From Chaotianmen to Zigui,the Shannon-Weaver diversity index of phytoplankton changes undeely.4 the impact of sediment deposition on zooplankton in the waters studiedAccording to the results of the experiment, we had learnt that the species composition of zooplankton sampled had the same tendence-the species was from less to more, and the biomass was also gradually increasing. Particularly Copepoda had increased significantly in the type and quantity. The main of zooplankton at each sampling situs were protozoa and rotifers.

朝天门江段到秭归江段的浮游植物的Shannon-Weaver多样性指数呈波浪式变化，整体有下降趋势。4研究水域泥沙沉降对浮游动物的影响从本次实验的结果来看，四次采样浮游动物种类组成都有同一个趋势：种类由少到多，生物量也逐渐增大，特别是桡足类在种类和数量上都增加明显，各采样点的浮游动物以原生动物和轮虫为主。

And the effect of different carbon source for the SYPS-062 and Corynebacterium glutamicum ATCC13032 fermentation were studied. The experiment result showed that the sucrose was 60 g/L, the yield of L-serine and biomass reached the maximal value, 6.6 g/L and 8.1 g/L respectively.

同时考察了碳源对菌株SYPS-062发酵产L-丝氨酸的影响，实验结果表明，当蔗糖浓度为60 g/L时，菌株SYPS-062生物量和L-丝氨酸的积累均达到最大值，分别为8.1 g/L和

The biomass, productivity and efficiency of radiation utilization in Cryptocarya concinna community in Dinghushan Biosphere Reserve were investigated.

摘 要：报道鼎湖山自然保护区黄果厚壳桂群落的生物量、生产力和光能利用效率。

In order to investigate the succession of soil microbial community with ecosystem development, soil samples of three successional stages (i.e., barren stage, cryptogamic crust stage and herbaceous vascular plant community stage) from two tailings wastelands (Yangshanchong tailings wasteland discarded in 2001 and New Tongguanshan tailings wasteland discarded in 1991) were collected and soil microbial biomass was determined by methods of typical plate culture' and molecular biology.

该研究以2处（即，铜陵杨山冲尾矿废弃地和铜官山新尾矿废弃地）不同时期弃置的、处于3个演替阶段（原生裸地阶段、隐花植物结皮阶段和草本维管植物群落阶段）的铜尾矿废弃地为研究对象，利用传统培养法和分子生物学法相结合的手段对土壤微生物量和土壤微生物群落结构变化及其影响因素进行了调查。

Inoculating the three protozoa reduced soil microbial biomass C. But corn straw decomposition was not decreased, even increased when inoculating Colpoda cucullus. The protozoa, in particular, Colpoda cucullus also had some effects on N and P transformation.

向土壤接种原生动物，虽然减少了土壤微生物生物量，但却促进了玉米秸秆分解，还对土壤有效磷含量、氮素转化产生显著的影响，其中Colpoda cucullus效果最明显。

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。