生物量

R : S ratio （belowground to aboveground biomass ratio） has been widely used for estimating root biomass.

利用根冠比和地上生物量来估算地下生物量是目前常用的方法，但目前缺乏根冠比的数据。

For the compensation principle, increased aboveground biomass was associated with decreased belowground biomass.

就补偿机制而言，植株地上生物量的增加以地下生物量为代价。

Before the treatment of drought stress, most of communities can be classified into following seven types with biomass of dominant species which took account of 60% in the plots: Triumfetta bartramia, Urena lobata, Cynodon dactylon, Gahnia tristis, Ageratum houstonianum, A/rtemisia argyi and Ambrosia artemisiifolia. There was no dominant species in other communities. Totally, there are 33 common species distributed in these plots.

在群落自然生长一年后，根据群落内物种生物量所占比例，将样地群落划分为七个优势物种类型(优势物种生物量所占比例均在60%以上，盖度在群落内均最大)：刺蒴麻、肖梵天花、狗牙根、黑莎草、藿香蓟、家艾和豚草，其余为均匀度较高没有优势物种的样地。

The estimate model of the tree's volume is shown by allometry method,the CVD model that transforms tree's volume into biomass reduced and its practical model process is explained.

研究了用相对生长法表示的材积和蓄积模型，导出了单木材积与其生物量的关系模型以及区域蓄积量与生物量的关系模型，即CVD模型，并说明了实际的建模过程。

The results of experiments and analyses are as follows: under low density, there is no notable competition between individual plants, the function relation between height and biomass shows a "simple allometry"...

结果表明：植物在低密度条件下，个体间没有明显的竞争作用存在，株高与生物量之间表现为"简单的异速生长"关系，其异速生长表达式为 y =a + bx的形式；植物在高密度条件下，个体间存在着激烈的种内竞争，株高与生物量之间表现为"非线性的异速生长"关系，其异速生长表达式为 y =ax2 + bx + c的形式

To improve the precision of tree biomass parameter calculation, this paper explicates the principle, method and process to estimate the parameters of tree biomass by the nonlinear least square according to the formula of allometry method. It gives the formula to calculate the variance and covariance estimated parameters, and reveals the essence of logarithmic linearization regression of power function.

为了提高林木生物量参数的计算精度，根据林木相对生长公式，阐述用非线性最小二乘法求解生物量参数估值的原理、方法和过程；给出计算参数估值之方差与协方差的公式；揭示幂函数对数线性化回归的本质。

There were significant linear relationships between arginine ammonification rate,microbial biomass C,soil ATP content and substrate-induced respiration.

比起其它土壤微生物生物量分析方法，精氨酸氨化法既简单、快速，又不需要昂贵的设备，可作为土壤微生物生物量测定方法。

And Changbai larch(Larix olgensis A.Henry)atdoubled CO2 concentration at seedling stage in growth-chamber and WI,HI of several dorminanttree species in MBKPF(1)Under 700μl·1-1 concentration of CO2,the stem height, stem diameter,main root length,root/shoot ratio and the relative proportions of biomass in root,stem and leaf of the seedlings ofKorean pine and Changbai larch had no significant change.

在700μL·L-1CO2条件下与正常浓度下相比较，在一个生长季后，红松、落叶松幼苗的苗高、地径、主根长、根茎比及生物量在根、茎、叶各器官中比例，差异不显著，对落叶松的侧枝数有影响；在第一、二次试验中，落叶松幼苗的平均每株生物量比在正常CO2浓度下大12.2％、14.2％，而红松幼苗的生物量分别减少3.9％、12.8％；红松、落叶松针叶叶绿素含量以及叶绿素a的相对含量在高浓度CO2下受到影响。

There was the same horizontal distribution for the abundance and biomass of ostracods in 9 sampling areas, and then the high abundance and biomass appeared in the east of Tai Lake (such as East Tai Lake, Eastern Coastal Belt and Gong Bay) because of the feeding and behavior habits of ostracods. Among the 9 areas, except for Meiliang Bay and Gong Bay, there was similar seasonal pattern for abundance and biomass in Tai Lake.

fabaeformis和塔尔薄丽星介的自身繁殖力是造成梅梁湖和贡湖中介形类丰度和生物量间存在差异的主要原因，但两湖区中介形类丰度和生物量在整个太湖中所占比重有限，所以不影响太湖总体介形类季节变化趋势，四个季节中介形类的丰度和生物量均值总体呈现出秋＞夏＞冬＞春的规律。

The results indicated that total biomass, tree layer biomass and understorey biomass increased according to a power function as plant

测定桉树人工林18 个实验小区（每块面积为100m2）植物多样性与群落总生物量、乔木层生物量和林下植被生物量

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。