生物量

The results showed that elevated CO2 increased the R/S ratio and the dry mass of both coarse and fine roots, indicating that the seedlings under elevated CO2 allocated more biomass to their belowground part. Compared with control, elevated CO2 increased the contents of reducing sugar, sucrose, and total soluble sugar in coarse roots significantly, but had less effect on those in fine roots. Elevated CO2 increased the contents of starch and total non-structural carbohydrate both in coarse roots and in fine roots. Under elevated CO2, the carbon content in coarse and fine roots had an unsignificant increasing trend, while the nitrogen content decreased significantly, which resulted in an increase of C/N ratio.

结果表明：CO2浓度升高使红桦幼苗粗根和细根的干质量增加，同时根／冠值显著升高，表明CO2浓度升高使红桦幼苗生物量向根系的分配增加；与对照相比，粗根的还原糖、蔗糖和总可溶性糖含量显著增加，而在细根中没有显著变化；粗根、细根的淀粉和总的非结构性碳水化合物含量显著增加；CO2浓度升高下粗根和细根的碳含量有升高的趋势但未达到显著水平，同时氮含量降低，碳／氮值升高；氮的吸收量在粗根和细根中均无显著变化。

The results showed that elevated CO2 increased the R/S ratio and the dry mass of both coarse and fine roots, indicating that the seedlings under elevated CO2 allocated more biomass to their below- ground part. Compared with control, elevated CO2 increased the contents of reducing sugar, sucrose, and total soluble sugar in coarse roots significantly, but had less effect on those in fine roots. Elevated CO2 increased the contents of starch and total non-structural carbohydrate both in coarse roots and in fine roots. Under elevated CO2, the carbon content in coarse and fine roots had an unsignificant increasing trend, while the nitrogen content decreased signifi- cantly, which resulted in an increase of C/N ratio.

结果表明：CO2浓度升高使红桦幼苗粗根和细根的干质量增加，同时根／冠值显著升高，表明CO2浓度升高使红桦幼苗生物量向根系的分配增加；与对照相比，粗根的还原糖、蔗糖和总可溶性糖含量显著增加，而在细根中没有显著变化；粗根、细根的淀粉和总的非结构性碳水化合物含量显著增加；CO2浓度升高下粗根和细根的碳含量有升高的趋势但未达到显著水平，同时氮含量降低，碳／氮值升高；氮的吸收量在粗根和细根中均无显著变化。

The analysis results of nutrient concentrations in Chinese cabbage plant indicate that the uptake of nitrogen and phosphorus in plant were increased significantly, and the uptake of plant potassium increase unsignificantly.

温室生物实验结果表明，保水剂包膜尿素能提高白菜的生物量，促进白菜植株氮、磷养分吸收，对钾吸收影响不明显。

Vicia amoena is a kind of legume which has large biomass ,high nutrition and large distribution.

在豆科牧草中，山野豌豆是一种生物量大、营养成分高且分布广泛的优质牧草。

It was Wote and PAM that promoted the growth of main tendrilled vine and roots, enhanced the photosynthesis, increased watermelon biomass, moved the harvest phase up, increased the yields and the production value, and obviously increased the water use efficiency of watermelon.

沃特和PAM保水剂的施用促进了西瓜主蔓和根系的生长，增强了叶片的光合作用能力，增加了西瓜的生物量，使西瓜的成熟期提前，产量和产值增加，水分利用效率显著提高。

In harvest phase, soil moisture in 0～100 cm deep soil of all treatments was lower than that in CK. In florescence and harvest phase, with amounts of Wote and PAM, biomass, tuber yields, biggest tuber increased, tuber number decreased.

不同处理花期、收获期均表现为沃特、PAM施用量越大，生物量、块茎产量越高，块茎个数越少，最大块茎越大。

Extracting high quality genomic DNA from single shoots of xeric bryophytes has been the bottleneck for further study on the genetic diversity.

：耐旱苔藓植物常常单个个体矮小、生物量低，如何从细小的单个个体中有效提取总DNA是进一步开展居群遗传多样性研究的关键。

Meanwhile the field investigation also showed that soil hardness affected the distribution of the zokor.

野外调查也表明土壤硬度是影响高原鼢鼠对栖息地选择的一个重要因素，高原鼢鼠明显选择土壤硬度较小、而杂草类生物量较高的地方栖息。

Benthic animals molluscs biomass as the highest, with more moderate aerobic benthic organisms exist, and the water body suited Zoobenthos survival.

底栖动物中软体动物的生物量为最高，有较多中等需氧底栖生物存在，水体状况适合底栖动物生存。

The effects of fire on ecosystems are complex, ranging from the reduction or elimination of aboveground biomass to impacts on belowground physical, chemical and microbial mediated processes and fine root.

火对生态系统的影响是复杂的，范围也很广，从减少地上部分生物量到对地下部分物理性质、化学性质、微生物降解过程和细根系的生长。

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。