一年生植物

Scented plants can also evoke memories. Some annuals with good scents are sweet alyssum, the large flowering tobacco "Nicotiana Sylvestris", the Regal Lily, which flaunts clusters of trumpet-shaped white flowers, and velvety purple heliotrope.

芳香的植物同样能唤起回忆，一些一年生植物有很好的香味，比如香雪球，大片花叶烟草植物：美花烟草，花攒锦簇，随风摇曳的白色"帝王百合"，和像天鹅绒般的紫色"青莲"。

This research was conducted in degraded rangeland at the southwestern edge of the Mu Us sandland, Yanchi county, Ningxia, the soil seedbank features and its relation to vegetation was analyzed using similarity analysis and ordination method, the results show that seeds within soil distribute mainly in 0~5 cm soil layer, less seeds in 6~15 cm soil layer in exclosed and non-exclosed rangeland, for seeds in exclosed soil, species richness and diversity index H are higher, while D is lower, exclosure measure, generally speaking, can increase plant species and amount of vegetation and seeds in soil, some annual plants, mesophytes and halophytes appears in the soil or surface.

以毛乌素沙地西南缘宁夏盐池县的退化草场为研究对象，采用相似性分析和排序方法对封育和未封育草场土壤种子库的特征及其与地上植被间关系进行了研究，结果表明无论封育区还是未封育区，土壤种子库中的种子主要分布于0~5cm的土层，6~15cm土层的种子数很少；封育区土壤种子库的物种丰富度大于未封育区，物种多样性则表现为H 值较大，而D值较小，总体上看封育措施可以提高地上植被和土壤中种子的种类和数量，一些一年生植物、中生植物和盐生植物开始出现在地面或土壤种子库中。

An annual is best known as a plant that completes it's life cycle in a single season. Hardy annuals can survive cold temperatures and some light frost, while tender annuals cannot tolerate cold temperatures and should be planted only after there is no more danger of frost. Half-hardy annuals can tolerate some cold temperatures, but are usually killed by frost. Annuals make excellent space fillers for the perennial garden.

一年生植物最显著的一个特点就是它在一个季节内完成它的生命轮回，耐寒的一年生植物能够在低温和轻微霜冻的条件下生存，但是幼嫩的一年生植物不能忍受低温，他们只能在没有霜冻危险的条件下种植，半耐寒型一年生植物能够经受一些低温条件的考验，但是通常他们因为霜冻死亡，一年生植物能够为多年一成不变的庭院创造一个很出色的空间。

Flooding,as a kind of disturbance events,occurred with higher and higherfrequency over the world.To investigate the effects of flooding disturbance ongrassland vegetation and the soil,a comparatively thorough study was conducted onAneurolepidium chinense grassland in Songnen plain,Northeast China.The studysite was located in Sanjiadian National Rangeland in the territory of Da'an city,Jilirprovince,which was partly flooded in 1998.On the study site,Several transectssubjected to different flooding durations and intensities were designed for thecomparative study among them on such aspects as vegetation characteristics,seedbanks,vegetative propagation of rhizomatous plants,distribution patterns ofpopulations,interspecific relations,and physio-chemical properties of soil.Theresults were as follows:(1)Of the functional group composition of the vegetation,with the elongation of the flooding duration or the increase of flooding severity,theratio of hygric and hygro-mesic plants increase,while that of mesic and mesoxericplants decrease,of Therophytes changed unimodally,of Geophytes increased,whileof Hemicryptophytes decreased.

为弄清草地植被及其土壤环境对水淹干扰的响应，在松嫩平原羊草草地1998年部分遭受水淹的吉林省大安市三家甸子草场内设置了经历不同水淹干扰持续时间和不同水淹强度的样带，并在这些样带之间从植被特征、种子库特征、根茎植物的营养繁殖性能、种群分布格局、种间关系及土壤的理化性质等多个方面展开对比研究，主要结果如下：(1)在植被的功能群组成中，随干扰强度的增加和水淹干扰持续时间的延长，湿生、湿中生类植物功能群的优势度比例基本上是逐渐增加的，中生、中旱生类植物功能群的优势度比例则逐渐减小，而一年生植物的优势度比例呈单峰型变化，地下芽植物比例增加，地面芽植物比例减小。

The species structure and importance value dynamics of annual plants in herbage synusia during a growth period have been observed, and the ecological mechanisms of these changes have been analyzed also.

通过跟踪观测一年生植物层片在一个生长周期内种类组成及其重要值的变化，并分析变化的生态学机理，得出如下结论：①在固沙区草本层片内，小画眉草的多度、盖度和重要值在群落中所占比例较大，是群落优势种；②在充足的降雨后，一年生植物都突发性萌发，但随着降雨的减少，层片内的一年生植物种群都呈衰退之势，其中小画眉草和虎尾草种群急剧减少，狗尾草、雾冰藜和虫实种群减少幅度不大。

Scented plants can also evoke memories. Some annuals with good scents are sweet alyssum, the large flowering tobacco "Nicotiana Sylvestris", the Regal Lily, which flaunts clusters of trumpet-shaped white flowers, and velvety purple heliotrope.

芳香的植物同样能唤起回忆，一些一年生植物有很好的香味，比如香雪球，大片花叶烟草植物：美花烟草，花攒锦簇，随风摇曳的白色&帝王百合&，和像天鹅绒般的紫色&青莲&。

In contrast, for t he newly stabilized sand dune, t he annual plant will consume more resource and energy for nutrition development in order to cope wit h the harsh environment.

通过研究，我们得到以下结论：随着沙面固定时间的延长，一年生植物生存的环境相对好转，一年生植物把更多的资源和能量用于繁殖，增加其种群规模；沙丘固定时间相对短的，一年生植物将把更多的资源和能量用于营养生长，以抵御不利的生长环境。

Plant species were classified into six plant functional groups based on their life forms, that is, trees, shrubs, sub-shrubs, perennial grasses, perennial forbs and annuals.

2依照生活型将锡林河流域主要植物种划分成6个植物功能群：乔木、灌木、半灌木、多年生禾草、多年生杂类草和一年生植物。

The relationship between biomass and succession gradient also showed unimodel pattern: y=-8.7647χ^2+86.696χ+67.14 (R^2=0.6164). As for functional groups of life form, annual plants showed decreasing trend in the community, perennial grass showed increasing tendency, while sedges and perennial forbs both showed increasing tendency, in which the increasing extend for sedges slowly and for grasses sharply.

一年生植物在群落中的数量呈下降趋势；禾本科植物在群落中的数量呈上升趋势；莎草类及杂类草植物在群落中的数量均呈增加趋势，但莎草类植物增幅不大，而杂类草植物则急剧增加。

You can add color and new life to the garden by replacing dying Summer Annuals and Perennials with Autumn blooming plants like Pansies, Chrysanthemums, and Ornamental Cabbage and Kale, Marigolds, and others.

你可以增添新的色彩和生命的花园取代垂死夏季与秋季开花植物一年生植物多年生植物，喜欢pansies，菊花、观赏和Kale白菜、金盏花和等。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。