生物量

There were no significant difference of underground biomass between control and mulching thickness treatments and between thickness treatments.

覆土对草地早熟禾当年地下生物量的影响在各处理及对照间均不显著(P＞0.05)。

Biomass of calanoids was low when fish predation was intensive, probably because their nauplii were more vulnerble.

在鱼类捕食压力较高的水体中哲水蚤的生物量较低，因为无节幼体较容易被鱼类所捕获。

About 74.6% of soluble organic substance was degraded in the lower 40 cm of media, while most ammonia was nitrified in the upper media.

生物量和生物活性的大小对污染物的沿程去除率影响较大，74.6%的有机物在进水端40cm厚的填料层内得到降解，而氨氮（NH+4-N）的硝化集中在上层填料层内。

Photosynthesizing communities living in coastal recharge areas preferentially fix 12C, such that the biomass is typically over 20% depleted in 13C relative to the marine inorganic C reservoir.

海岸补偿地区的营光合作用的生物群落更多的固定了12C，所以富含这种生物量的地区通常记录了相对海洋无机碳超过20%的缺乏13C。

The more degree shaded treatments were, the more biomass was allocated to the below-ground parts, resulting in the less ratios between above-ground and below-ground biomass. Shaded treatments limited sexual reproductive ability of V. spinulosa, which has reproduced less of ramets and winter tubers under shaded conditions versus natural conditions. V. spinulosa adapted the change of light by means of refuging life-history strategy.

随着遮阳强度的增加，刺苦草的最大叶长、总葡匐茎长和总的叶面积减少，遮蔽强度越大，分配到地下的生物量越多，冠根比率越小；遮阳生境下的刺苦草的有性繁殖受限，无性繁殖形成的分株和冬芽也比自然状态少得多；刺苦草采用回避策略应对光照胁迫。

The frequency of the occurrence of the debris of livestock is 70%in the scats of the wolves,its relative biomass reached to 92.8%.

狼的食物主要为家畜，家畜在狼的粪便中出现的频率为70%，其相对生物量在狼的食物总量中的比例高达92.8%。

Research results indicated that the underground biomass changes of three species differed obviously under different traffic treatment. Poa pratensis and Zoysia japonica underground biomass increased at the light traffic then declined. 'Barlexas' Tall fescue decreased with increasing traffic stress. Obvious root shallowing phenomenon is displayed through the increase of roots percent in surface layer and decline in deep layer. Moreover, traffic made the soil density and hardness increase.

结果表明：践踏胁迫下，3种草坪草地下生物量变化表现出较大差异，草地早熟禾和日本结缕草先增加后下降，高羊茅一直呈下降趋势；3种草坪草表层根系（0~5cm）所占比重明显增加，深层根系所占比重减小，根系的表层化现象明显；研究还表明，践踏使表层土壤容重和硬度增加，物理性质恶化。

The results shoed that the total tree biomass in the transects adjacent the road was slightly higher than that of the inner forest communities, showing a positive edge effect, while the soil acidity and total nitrogen content in downgrade transects showed a negative edge effect.

结果表明，紧邻道路两边样带的乔木总生物量略高于群落内部，表现出边缘的正效应。道路坡下边缘土壤的pH值较高，全氮含量最低，边缘效应为负效应。

At the same time the silts amount attached on H. verticillata observably were added with water turbidity increasing. Compared with plants in the control water, the leaf width of H.

植株生长接近水面后接受的光照强度增加，第60天时株高和叶宽增长受到显著抑制，但植株上层的分枝受到促进，生物量显著增加。

The most promising approaches involve subjecting the biomass to extremes of pH and temperature.

最有希望的办法涉及以生物量，极端的pH值和温度为条件。

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。