发芽率

Compared with the control, the exudate treatment significantly hampered the percent germination, rate of germination and bolstered dormancy for almost all species.

与对照实验相比，种子浸出液处理对种子的发芽率、发芽速度均具有明显的抑制作用，并能增强种子的休眠。

The main factor affecting the germination precentage of rice seeds is firedamp liquid and has nothing to do with the water absorbtion.

结合种子发芽率与秧苗素质及生长综合表现，建议采用沼液浸24～36h后再用清水浸24h的方法比较适合。

This study found that the combined effect of H202 and GA3 could increase germ i nation rate of green foxtail to an idea degree.

用双氧水和赤霉素联合作用可以打破青狗尾草种子休眠，使青狗尾草种子发芽率提高到合适的水平。

The results showed that when the concentration of Pb(superscript 2+) was lower than 400 mg/L, effect on the germination root length, bud length, root weight, bud weight, the root activity and the proline content of the garden balsam were not obvious.

结果表明，当Pb(上标 2+)浓度低于400mg/L时，对凤仙花种子的发芽率、发芽势、幼苗的根长、芽长、根重、芽重、根系活力及脯氨酸含量影响不大，当Pb(上标 2+)浓度为800mg/L时，对凤仙花种子才开始表现出明显的抑制作用。

Such indexes as gemination rate, germinate speed, seedling growth, index of vigor, index of germination were measured.

返地后对其标准发芽率、发芽速度、种苗生长、发芽指数、活力指数等指标进行测试。

Methods:Large-leaved gentian seeds were treated with the drug and hot water treatment of seeds, et al. The difference of germination ratio by different ways was compared with statistical way.

采用药剂处理、温汤浸种等方法处理秦艽种子，用统计学的方法比较不同处理间发芽率的差异。

From the point of view of geobotany, with the method of correlative factors of growth of plants, a countrywide theoretic ecological division was done for the introduction of Camptotheca acuminata and three kinds of areas of ecological preferent zone, ecological adaptive zone and ecological unadaptable zone were divided. With the theory of synecology, the characteristic on environment, constitution, life form spectrum, diversity, similarity of plots of communities were researched. Applying the method of species association, discrete distribution, indensity index, fractal geometry, etc. to research relations between the species of the communities, space distribution of Camptotheca acuminata, structure of age of Camptotheca acuminata, in different communities. Using the theories of autoecology, distibutons of seeds on land and growth of seedlings in vertical and horizontal directions, biomass of organ of Camptotheca acuminata were analyzed. On the opinions of conservation biology, the external and internal factors impressing Camptotheca acuminata were analyzed to research the mechanism of the endangered species, and with using of CTM Model, the future development direction of Camptotheca acuminata in different communities were forecasted, and. Standing on the position of resources ecology, discussing the regularity of camptothein in Camptotheca acuminata of different sites and seeding of different resources, also the the derive technics of camptothecin.

本文从地植物学的角度，运用植物生长相关因子法，对我国喜树资源的生态适宜区进行了划分，理论上确定了我国的喜树的引种栽培的最适生活区域、生态适宜区域和不适宜生活区域；从群落生态学的角度，对野生喜树所在的典型群落的群落环境、群落组成、群落生活型谱、群落的物种多样性特点、群落样地间相似性进行了研究；从种群生态学的角度，运用种间联结性、离散分布模型、聚集强度指数、分析几何等分析手段，对野生喜树所在典型群落间的种间关系、喜树的空间分布格局、年龄结构等进行了分析；从个体生态学的角度，对不同年龄组的喜树的种子的散落的垂直分布、水平分布、时间分布及种子发芽率和千里重等特点、不同种源的人工喜树苗期特点、喜树的高生长和茎生长特点、喜树的器官生物量特点进行了研究；从保护生物学的角度，对野生喜树的濒危的内部因素和外部因素进行了探讨，并运用CTM模型对不同群落中野生喜树的种群趋势进行了预测；从资源生态学的角度，对我国地理环境下喜树中喜树碱含量的地理分布规律、不同种源的喜树幼苗中喜树碱含量变化规律进行了研究，并对喜树碱的提取工艺进行了探讨。

The result showed that:①the pollen germinability was going down following the falling of FT and GT,pollen germination rate is above 48% under normal GT24℃,about 30% under GT15℃,the germination rate under GT9℃ is fearfully low,approaching zero,all the influence of FT and GT is highly significant,but,the effect of the GT is bigger,the interac...

不同的FT和GT组合下，自交系间花粉的发芽率除FT15℃/GT24℃下差异不显著，其他FT(15℃、12℃、9℃)和GT(24℃、18℃、15℃、12℃、9℃)的各组合温度下，都达到了极显著差异。

The germinability and vigorindex could almost remain stable when seeds werestored under LTHH or LTLH or HTHH conditions.

在高温干燥，低温高湿、低温干燥贮藏条件下，种子发芽率及活力指数变化都较小。

Sinopodohyllum hexandrum seeds were treated with different concentration NaHCO3, Na2CO3, KT, GA3, NAA, 6-BA and 2, 4-D. The effects of different chemicals on Sinopodohyllum hexandrum seeds were measured, and seed germination rate, germinability, germination index and germination speed were determined.

方法］用不同浓度的碳酸氢钠、碳酸钠、细胞激动素、赤霉素、萘乙酸、6-苄基－嘌呤和2，4-D等7种药剂处理桃儿七种子，通过测定种子发芽率、发芽势、发芽指数和发芽速度等活力指标研究药剂对桃儿七种子萌发的促进作用。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。