植物计

There were 14 invasive alien plant species out of 53 investigated plant species, accounted for 26.42% of total plant species found in the experimental zone. In terms of the comprehensive values of dominance of invasive alien weeds, Ageratum conyzoides and Pliea microphylla were larger than that of other plant species.

实验区样方内共发现53种植物，其中外来入侵植物计有14种，占植物总数的26.42%，外来入侵植物胜红蓟Ageratum conyzoides和小叶冷水花Pilea microphylla的优势度综合值最大。

There are 13 genera 21 species of terricolous arethusa, 10 genera 20 species of adnascent arethusa and 17 genera 29 species of rare and endangered in the area.

根据野外调查和文献考证，潮汕地区野生分布的兰科植物计有23属，41种。

Empirical relationships between them are fitted and then the computation formula of vegetation resistance is derived.

拟合粗糙度与植物高度和密度的经验关系式，进而得出了植物阻力的计算式。

Rna - Rns, see "Partitioning of net radiation", for multiple plants the fraction of radiation to each plant is calculated in the radiation section, see "Partitioning of radiation between plants", es is the vapour pressure at saturation, ea is the actual vapour pressure,ρa is air density, cp is the specific heat of air at constant pressure, Lν is the latent heat of vaporisation,Δ is the slope of saturated vapour pressure versus temperature curve,γ is the psychrometer "constant", rs is an "effective" surface resistance and ra is the aerodynamic resistance.

潜在蒸腾量 Etp 根据Monteith(1965)给出的彭曼联合方程形式计算：式中： Rn 为对于蒸腾的有效净辐射量(也就是 Rna - Rns ，见"净辐射划分"-Partitioning of net radiation，对于多重植被，每一株植物的辐射比率的计算见辐射一节的"植物间的辐射划分"Partitioning of radiation between plants)； es 为饱和水气压；ea 为实际水气压；ρa 为空气密度； cp 为常压下的空气比热；Lν为汽化潜热；Δ为与温度曲线饱和水气压关系曲线斜率；γ为干湿球湿度计"常数"；rs 为"有效"表面阻力；ra 为气动阻力。

With unit integrating and scale conversion, the transpirations determined by lysimeter and L I21600 stoma mete r are analyzed wit h Variance Analysis Method. The results s how that the difference between species is significant (P.05), but t he difference between methods is not significant. It indicates t hat t he scale conversion between leaf level and plant population level based on canopy and leaf area index is successful.

通过单位换算统一和尺度转换，蒸渗池和LI1600气孔计测定结果进行方差分析，表明物种间差异达显著水平(P.05)，测定方法间(蒸渗池和LI1600气孔计)差异不显著；从而说明本研究以叶面积指数和植物冠层盖度为基础，进行叶片水平与种群水平间的尺度转换是可行的。

There are 64 families, 114 genera and 198 species, including 7 families, 8 genera and 19 species of peridophyte, 2 families, 2 genera and 2 species of gymnosperme, 55 families, 104 genera and 177 species of angiospermae.

结果表明：古田山自然保护区常绿阔叶林植物种类十分丰富，计有维管束植物64科114属198种，其中蕨类植物7科8属19种，裸子植物2科2属2种，被子植物55科104属177种。

The photosynthesis is determined by photosynthesis meterThe results showed that the net photosynthesis rate of Carex lasiocarpa(47.41 μ mol/m/s)is faster than those of other plants in Carex lasiocarpa wetland, Based on the overall sunlight radiation and the efficient photosynthesis radiation, energy utilization rate in radicula was the highest(1.3945% and 3.1879%)While those in spike was the lowest(0.0020% and 0.0046%).

毛果苔草湿地的物理过程观测设在中国科学院三江平原沼泽湿地生态实验站内，用美国CID公司出品的光合仪对典型湿地中几种优势植物的光合能力进行测定；在80℃干燥的植物样品，粉碎后，分别称量约1g左右，用美国公司Parr型氧弹式热量计测定；研究发现毛果苔草湿地建群种中毛果苔草的净光合速率最大，为47.41μmol/m/s。

Rna - Rns, see "Partitioning of net radiation", for multiple plants the fraction of radiation to each plant is calculated in the radiation section, see "Partitioning of radiation between plants", es is the vapour pressure at saturation, ea is the actual vapour pressure,ρa is air density, cp is the specific heat of air at constant pressure, Lν is the latent heat of vaporisation,Δ is the slope of saturated vapour pressure versus temperature curve,γ is the psychrometer "constant", rs is an "effective" surface resistance and ra is the aerodynamic resistance.

潜在蒸腾量 Etp 根据Monteith(1965)给出的彭曼联合方程形式计算：式中： Rn 为对于蒸腾的有效净辐射量(也就是 Rna - Rns ，见&净辐射划分&-Partitioning of net radiation，对于多重植被，每一株植物的辐射比率的计算见辐射一节的&植物间的辐射划分&Partitioning of radiation between plants)； es 为饱和水气压；ea 为实际水气压；ρa 为空气密度； cp 为常压下的空气比热；Lν为汽化潜热；Δ为与温度曲线饱和水气压关系曲线斜率；γ为干湿球湿度计&常数&；rs 为&有效&表面阻力；ra 为气动阻力。

Different parts of twenty dominant plant species in five plantation communities on the subtropical hilly lands in Heshan of Gunagdong as well as the litters from three of the five plantation communities were sampled, and their gross caloric value and ash content were measured by using a PARR-1281 oxygen bomb calorimeter and a muffle furnace.

从广东鹤山南亚热带丘陵5种人工林群落中采集20种主要植物器官及3种群落凋落叶样品，利用PARR-1281氧弹热量计和马福炉分别测定样品的干质量热值和灰分含量，再计算去灰分热值；按器官、个体和生长型等比较分析植物的热值和灰分特征。

The converse observation, of the absence of grazers in areas of high phytoplankton concentration, led Hardy to propose his principle of animal exclusion, which hypothesized that phytoplankton produced a repellent that excluded grazers from regions of high phytoplankton concentration.

高的浮游植物集中的区域的缺少吃草的动物相反的观察，努力地引导计画他的动物排除的原则，假定浮游植物生产了一个将吃草的动物排除在高的浮游植物集中的区域之外了的防水剂。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。