生物量

The biomass of zooplankton changed relatively intensely, especially Cladocera、Copepoda and Young animal, and the biomass of the zooplankton will gradually increase.

随着泥沙的逐渐沉降，浮游动物生物量变化相对激烈，尤其是枝角类、桡足类和无节幼体，水中浮游动物生物量将逐渐增加。

The mean density and biomass of cladocera are 0.070 ind/L and 0.002 mg/L. The mean density and biomass of copepoda are 5.155 ind/L and 0.021 mg/L. 5. Attached algae were classified into 3 Phylum 16 Genus 27 Species.

枝角类的平均密度为0.070 ind／L，平均生物量为0.002 mg／L；桡足类的平均密度为5.155 ind／L，平均生物量为0.021mg／L。

There was no significant difference on the density and biomass of phytoplankton between spring and summer.1.1.3 The dominant species of phytoplankton was as the following:Gomphonema sp.,Synedra sp.,Navicula sp.,Nitzsschia closterium,Cymbella sp.,Closterium sp..1.1.4 Comprehensive index demonstrated that the water quality was polluted slightly in Maqu section.1.1.5 A negative correlation was present between the density and biomass for phytoplankton and altitude in spring and summer.

1.1.4综合几种指数的综合评价，该流域水质呈轻度污染。1.1.5春夏两季，浮游植物密度、生物量均与海拔呈负相关性，即随着海拔的上升，浮游植物密度、生物量呈下降趋势。1.2浮游动物群落结构1.2.1浮游动物共2门18种。

Either in the un-drought or drought plots with various gradients of species richness, both survival competition ability and growth competition ability of Sida rhombifolia, Mosla dianthera and Cassia mimosoides were the lowest.

以物种生物量百分率增加值代表物种生长特征竞争能力，干旱胁迫和正常对照样地内物种生物量百分率增加值之间不存在显著相关性，生长特征竞争等级明显改变，说明干旱胁迫对物种生长特征的竞争等级有明显的影响作用。

In Fagopyrum esculentum grown under different density and sowing date, there was significant plasticity in stem mass ratio, leaf mass ratio and leaf to root ratio, as well as single measures of stem length, stem diameter, branch length and number of branches.

在不同密度和播期下种植的荞麦，茎生物量分配、叶生物量分配、叶根比，及单株茎长、茎直径、分枝长和分枝数都有显著的可塑性。

Root-derived organic carbon is composed of three compartments: root detritus, root eaudates and root symbionts, which represents a large important and potential C sink in forest ecosystems, The known responses of root derived organic carbon and heterotrophic microbes to elevated CO2 were reviewed. Overall, increases in root biomass, productivity, and exudation indicate an augmentation of C inputs into the soil via roots, although changes in root lifespan are still unclear and may modify this flux positively or negatively, Altogether, changes in root chemistry and morphology that may augment soil C storage under elevated CO2 include decreased N concentration and wider root diameter, Alternately, a shift in rooting depth upwards in the soil profile may increase average turnover rates of root detritus. Effects of CO2 concentration on C qualities of root exudates and root symbionts are the least understood components discussed here, Changes of soil heterotropic microbial activity and community under elevated CO2 still remained large uncertainties.

林木根源有机C包括根东通过根枯落物、根系分泌物和根共生菌周转3条途径向土壤输入的有机C，它是森林生态系统中一个重要的、潜在的C汇，综述了根源有机C与其微生物对CO2浓度升高的响应，虽然对根系寿命的变化尚不清楚，但CO2浓度升高将导致根系生物量、生产量、死亡量和分泌物的增加；同时，CO2升高亦促使根共生菌生物量的增加而增加了共生菌的C归还潜力，表明CO2升高使根源有机C的输入增加了，CO2农度升高情况下，根系化学性质和形态特征的这些变化均有利于增加土壤C的吸存；而根分布深度的降低则对土壤C吸存不利；CO2浓度升高对根分泌物和根共生菌质量的影响研究则极少，CO2浓度升高下土壤微生物活性和群落组成的变化存在较大的不确定性，目前CO2浓度升高下林木根源有机C对森林长期C吸存的贡献仍很不清楚。

Fertilizer treatment can elongate stem length, internod length, petiole length and increase leaf area and leaf numbers of Humulus Scandens. Fertilizer treatments also improve the total biomass and modular biomass accumulation.

施肥处理有助于葎草攀援植株主茎长度、节间长度、叶柄长度以及叶面积和叶数的增加；施肥也能促进植株总生物量的和各构件生物量的积累。

Microbial biomass in soil profile showed negative relation with soil pH value and bulk density, while positive correlation with contents of soil organic carbon, light fraction and particulate organic carbon and fine root biomass were found. There were no significant difference between soil microbial biomass and DOC, total N, total P, hydrolyzable N and available P.

土壤微生物生物量垂直分布与土壤pH和容重呈负相关，与土壤的有机碳、轻组有机碳和颗粒有机碳含量及细根生物量呈显著的正相关，但与土壤可溶性有机C和全N、全P、水解性N和速效P含量的相关性不显著。

Results showed that biomass of the ground part of Juncus Effuses was inhabited to a certain degree. When the dosages of the heavy metals added to the soils were close to Grade II Criteria of the State Soil Environmental Quality Standard (GB15618-95), Juncus Effuses could still grow normally in appearance though its yield decreased by 10%, however biomass of the underground part was not much affected.

实验结果表明：5种重金属复合污染对灯心草地上部生长有一定程度的抑制作用，在土壤环境质量二级标准上限值处灯心草地上部生物量减产9.15%，0%，但地下部生物量减产趋势不明显。

With decreasing nutrient supply, biomass allocation to laminae and petioles decreased, whereas that to roots increased.

随土壤养分的降低，绢毛匍匐委陵菜对叶片和叶柄的生物量投资减小，而对根系的生物量投资增加。

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。