生物量

6Unicellular periphyton has also shown good adaptability to sewages,with remarkable increases of Chla(58.2%)and biomass (54.0%).It was also observed that community compositions were successfully changed from original unicellular Bacillariophytes and chlorophytes dominated community to filamentous and unicellular Cyanobacteria dominated community.

6水质处理期间，颗粒态周丛藻类也表现出对污水环境很好的适应性，其Chla在整个试验期间增长了58.2%，生物量增长了54.0%，群落组成由试验初期的颗粒态硅藻、绿藻为主，转变为试验后期的以丝状和颗粒态蓝藻、绿藻为主的藻群，水绵、丝藻、纤维藻、颤藻等藻类大量出现。

Under this experiment condition, biomass, grain weight and number of panicles upgraded with the increase of nitrogen level.

氮处理对不同基因型水稻地上部的生物量和籽粒产量有极显著影响。

Focusing on all these functional traits, 13 functional groups were identified by TWINSPAN (two-way indicator species analysis), and their change with different environmental factors, disturbance types and recovery time was ordinated by DCCA(detrended canonical correspondence analysis).

本文以海南岛霸王岭林区作为海南岛热带林的典型区域，以反映不同环境因子、干扰类型和恢复时间的热带山地雨林为研究对象，在大面积(15hm~2)样地调查的基础上，依据物种的7个功能特性(喜光性、潜在高度、板根大小、木材密度、种子生物量、传播方式和落叶／常绿性)，分别把物种划分为不同类别的功能群，应用NMS分析了各功能群随不同干扰类型和恢复时间热带山地雨林群落的变化规律。

There is no great difference of winter wheat tillering, leaf area index and biomass between sprinkler irrigation and surface irrigation condition.

喷灌和地面灌条件下冬小麦分蘖、叶面积指数、生物量等相差较小。

The selection of an appropriate winter crop that is beneficial to rice crop and paddy soil is critical to sustainable crop production.

试验结果表明：几种冬季作物均提高了稻田土壤微生物碳、氮含量，黑麦草明显提高了土壤微生物量碳和微生物熵，紫云英明显提高了土壤微生物量氮。

Experiments is located at Yucheng Comprehensive Experimental Station, Chinese Academy of Sciences, Yuchen County, Shandong Province (Latitude: 36°57′N, Longitude: 116°36′E, and Altitude: 20m) in 2000～2001 and 2001～2002 winter wheat growing seasons. Mainly observed factors under sprinkler irrigation and surface irrigation conditions include (1) dry and wet bulb temperature and wind speed at four heights, radiation, soil temperature and water surface evaporation of 20cm standard pan on the top of canopy;(2) winter wheat tillering, stem height, leaf area, biomass and yield; and (3) soil water content and winter wheat evapotranspiration.

实验在中国科学院禹城综合试验站进行，主要观测内容包括：（1）喷灌和地面灌溉条件下近地面不同高度处的温度和湿度、辐射、地温和冠层顶部水面蒸发量等农田小气候要素；（2）叶面积、生物量和产量等作物生长要素；（3）土壤水分变化过程、农田蒸发过程和冬小麦耗水量等要素。

the effects of heavy metals pb, cr on wheat seed germination and biomass were discussed.

对重金属pb、cr对小麦种子萌发以及幼苗生物量的影响进行了研究。

Then,they are presented,to satisfy the demands of forestry development in new century,that the volume estimation method by using one-way volume table should be improved,and that some important forestry tables such as volume table and biomass table should be revised or supplemented.

从分析我国森林资源连续清查中的材积估计问题入手，提出为满足新世纪林业发展的需要，必须对目前用一元材积表估计材积的方法加以改进，并进一步补充完善材积表和生物量表等基础林业数表。

The mainly study results as follows:(1) The study focused on the characteristics of whole distribution and typical structures of water conservation forest in moutain areas of Beijing. According to analized the structure of 18 typical forest stands, including the species structure, horizontal structure, vertical structure, quantitative indicators and standards.Conclusion that: uneven-aged, double layer and mixed structure were .

通过对北京山区水源林18种典型森林类型林分结构归纳总结，从林分物种结构、水平结构(混交度、年龄、郁闭度、大小比数)、垂直结构、生物量、土壤厚度等方面，提出北京山区典型森林类型的结构特征，并定量化表达，从而总结出北京山区水源林结构的关键要素是：异龄、复层和混交。

Under the condition [0mmol/L,raise in vermiculite] of phosphorus stress, variation in root morphology and biomass among different soybean genotypes at seedling stage were studied, the result shows: At two-leaf age, higher P-efficiency genotypes(K1 and K2) don't develop their potential advantages; at four-leaf age, some characteristics of K1 and K2, such as lateral root number, lateral root length, root absorbent area and dry weight of shoot are all less reduced than those of intermediate P-efficiency genotypes(Z1 and Z2) and of lower P-efficiency genotypes(M1 and M2), and dry weight of root and R/S of higher P-efficiency genotypes are more increased than those of the others.

在磷胁迫[0mmol/L，砂培]条件下，对不同基因型大豆苗期在根系形态、生物量等方面的差异进行了研究，结果表明：磷高效基因型在两叶期并未发挥出其基因型潜力的优势；四叶期，磷高效基因型的侧根数、侧根长、根系吸收面积、茎叶干重等性状的受抑制程度均显著低于磷中、低效基因型，而地下干重、根冠比却受到了较中、低效基因型更强的诱导作用。

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。