生物量

It is proved that time delays that represent the lags between the uptake of nutrients and the reproduction of microorganism don't affect the stability of Chemostat models.

证明了从吸收营养到转化为生物量的时滞不影响微生物培养模型的稳定性。

Crinoids, ammonoids and bivalves dwelt on the stems and lived on pseudoplanktons. They were gradually deposited on the sea bottom with increasing biomass of the dwelling organisms and lime content, and at last concretions were formed.

海百合、双壳类和菊石类栖息在植物茎干上营假浮游生活，随着栖息生物量和化学沉积物灰泥的增加，逐渐沉积在海底形成结核。

However TGase activity did not change significantly by increasing Zn2+ initial concentration.TGase activity did not change significantly when the fermentation culture was dialysed with EDTA addition. according to the change of biomass at different Zn2+ initial concentrations, the author considered that Zn2+ was not the component or active centre of TGase.

EDTA透析对TGase的酶活没有产生明显影响，结合不同Zn2+含量时SK4.001生物量的变化，作者认为，Zn2+在SK4.001发酵产TGase中同时具有营养和促进SK4.001产TGase的作用，但Zn2+并不是TGase的构成部分或活性中心，有关Zn2+促进SK4.001产TGase中的具体作用机理仍有待进一步研究。

Primary research involves classification of ecosystem types and basic evaluation units; development of a map of ecotypes; measurement of biomass, productivity and crosion and analysis of the pattern of space structures in landscape units.

主要研究内容包括：生态系统类型及评价单元的划分；生态类型图的编制；生物量生产力和水土流失状况的测定；以及景观单元的空间结构格局分析等。

The height and aboveground biomass of vegetation are not significant related tothe methane effluxes from littoral zone of Huahu Lake, Zoige Plateau.

植被高度以及植被地上生物量与若尔盖高原花湖湖滨带甲烷排放速率的相关性不显著。

At the same time, the biomass of species-rich community was more sensitive to the change of environmental conditions, while communities with fewer species had a little change in biomass.2 There were a total of 87 vascular plant belonging to 27 families and 68 genus in the six communities. Most species had a narrow distribution and a lower local abundance, while few species had a wider range and higher local abundance, and this distribution trends varied in different communities. The endemics were positive correlation to y diversity.

物种丰富的群落生物量对环境条件的变化敏感，较过去显著降低，而种类构成简单的群落则变化不大。2在6种植物群落中共出现27科68属87种高等维管植物，大多数物种具有狭窄的分布范围和较小的局域多度，而少数种具有较广的分布范围和较大的局域多度，并且这种分布趋势在不同的群落类型中又有所不同，γ多样性高的群落中特有种的数量增加；而γ多样性低的群落中稀有种数量相对较少。

With the Sand culture method, influences of different magnesium levels (0%、50%、100%、150%、200% and 300%) was explored to the wheat seedlings of different stages. Many targets such as plant height, root length, biomass, content of chlorophyll, activity of root, RGY, RGR and ratio of root to crown of the wheat were mensurated at the time of 7d, 15d and 30d of two leaves stage of wheat seedlings after their endosperms were removed at different magnesium levels.The results showed that different magnesium levels had unlike influences over the wheat seedlings.

以小麦为试材，采用砂基培养的方法，在镁浓度分别为对照组的0%、50%、100%、150%、200%和300%的营养基质上，培养剔除胚乳后的二叶期小麦幼苗7d、15d及30d，并分别测定该3个时间段小麦幼苗的株高、根长、地上部和地下部的生物量、叶绿素含量、根系活力以及相对生长速度、相对生长速率和根冠比等指标，研究不同供镁水平对不同时期小麦幼苗生长速率的影响。

The percentage of total biomass allocated to roots was positively correlated with WUE for the seven investigated species (r=0.93, p.01). Results indicate that the species investigated are typical C3 plants. These spring ephemerals are characterized by higher P T and lower WUE in comparison with other desert species. The unique biomass allocation of low root/aboveground biomass ratio, higher leaf area ratio, higher leaf mass per unit leaf area, and photosynthetic traits are involved in the physiological mechanisms that contributed to the rapid growth of desert spring ephemerals.

这些结果表明，所观测的早春短命植物具有典型的C3植物特征，相比其它类型的荒漠植物具有较高的单位叶面积P高T及低WUE，并且在生长发育过程中表现出很低的根／地上生物量比、较高的叶面积比和单位叶面积干重，说明它们具有相对高的生长速率，这与其生长发育节律相一致，反映了它们与准噶尔荒漠环境相适应的特点。

The main aim of the present study was to address: 1 ） the photosynthetic characteristics and the biomass allocation traits of spring ephemerals and 2） the relationship between these traits and unique growth pattern of these spring ephemerals. Methods In vivo photosynthetic traits of 16 spring ephemerals at their growth stages were measured by an open gas-exchange measurement system （Li-6400） and biomass allocation patterns were measured in seven species.

该文运用Li-6400开放式气体交换光合作用测定系统，对分布于准噶尔荒漠的16种早春短命植物生长盛期的净光合速率、蒸腾速率、水分利用效率等特征进行了测定，并对其中7种植物与生长相关的生物量分配特征进行了分析。

The percentage of total biomass allocated to roots was positively correlated with WUE for the seven investigated species （ r = 0.93, p 〈 0.01）. Results indicate that the species investigated are typical C3 plants. These spring ephemerals are characterized by higher Pn, Tr and lower WUE in comparison with other desert species. The unique biomass allocation of low root/aboveground biomass ratio, higher leaf area ratio, higher leaf mass per unit leaf area, and photosynthetic traits are involved in the physiological mechanisms that contributed to the rapid growth of desert spring ephemerals.

这些结果表明，所观测的早春短命植物具有典型的G植物特征，相比其它类型的荒漠植物具有较高的单位叶面积Pn、高Tr及低WUE，并且在生长发育过程中表现出很低的根／地上生物量比、较高的叶面积比和单位叶面积干重，说明它们具有相对高的生长速率，这与其生长发育节律相一致，反映了它们与准噶尔荒漠环境相适应的特点。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。