查询词典 ephemerals

The main aim of the present study was to address: 1 ） the photosynthetic characteristics and the biomass allocation traits of spring ephemerals and 2） the relationship between these traits and unique growth pattern of these spring ephemerals. Methods In vivo photosynthetic traits of 16 spring ephemerals at their growth stages were measured by an open gas-exchange measurement system （Li-6400） and biomass allocation patterns were measured in seven species.

该文运用Li-6400开放式气体交换光合作用测定系统，对分布于准噶尔荒漠的16种早春短命植物生长盛期的净光合速率、蒸腾速率、水分利用效率等特征进行了测定，并对其中7种植物与生长相关的生物量分配特征进行了分析。

The main aim of the present study was to address: 1 the photosynthetic characteristics and the biomass allocation traits of spring ephemerals and 2 the relationship between these traits and unique growth pattern of these spring ephemerals. Methods in vim photosynthetic traits of 16 spring ephemerals at their growth stages were measured by an open gas-exchange measurement system (Li-6400) and biomass allocation patterns were measured in seven species.

该文运用Li-6400开放式气体交换光合作用测定系统，对分布于准噶尔荒漠的16种早春短命植物生长盛期的净光合速率P(下标 n、蒸腾速率T(下标 r、水分利用效率等特征进行了测定，并对其中7种植物与生长相关的生物量分配特征进行了分析。

From studying correlation with roots of ephemerals and factors of environment, the results showed: the most roots of ephemerals don t site so deep under ground and April is the most important period for growing of roots.

对早春短命植物根系和立地条件的研究表明：早春短命植物的根系大都分布在土壤浅层；4月份是其根系发育的主要阶段。

Net photosynthetic rate of the three ephemerals all reached the highest values at 12:00. Regarding the curves of diurnal variation, Pn of Eremopyrum and Malcolmia had two peaks, and an obvious midday depression occurred at 14:00; Transpiration rate of all the three ephemerals had only one peak; water use efficiency of Eremopyrum and Malcolmia had two peaks, and that of Tetracme had only one.

结果表明：东方旱麦草和卷果涩芥的净光合速率的日变化呈&双峰&型，14：00(采用时间均为北京时间，后同)左右存在明显的光合&午休&现象，四齿芥Pn的日变化呈&单峰&型，峰值出现在12：00与前两者的第一峰值出现时刻相同。3种植物蒸腾速率的日变化均呈&单峰&型，但不同植物的峰谷值出现时刻不同。

The percentage of total biomass allocated to roots was positively correlated with WUE for the seven investigated species (r=0.93, p.01). Results indicate that the species investigated are typical C3 plants. These spring ephemerals are characterized by higher P T and lower WUE in comparison with other desert species. The unique biomass allocation of low root/aboveground biomass ratio, higher leaf area ratio, higher leaf mass per unit leaf area, and photosynthetic traits are involved in the physiological mechanisms that contributed to the rapid growth of desert spring ephemerals.

这些结果表明，所观测的早春短命植物具有典型的C3植物特征，相比其它类型的荒漠植物具有较高的单位叶面积P高T及低WUE，并且在生长发育过程中表现出很低的根／地上生物量比、较高的叶面积比和单位叶面积干重，说明它们具有相对高的生长速率，这与其生长发育节律相一致，反映了它们与准噶尔荒漠环境相适应的特点。

The percentage of total biomass allocated to roots was positively correlated with WUE for the seven investigated species （ r = 0.93, p 〈 0.01）. Results indicate that the species investigated are typical C3 plants. These spring ephemerals are characterized by higher Pn, Tr and lower WUE in comparison with other desert species. The unique biomass allocation of low root/aboveground biomass ratio, higher leaf area ratio, higher leaf mass per unit leaf area, and photosynthetic traits are involved in the physiological mechanisms that contributed to the rapid growth of desert spring ephemerals.

这些结果表明，所观测的早春短命植物具有典型的G植物特征，相比其它类型的荒漠植物具有较高的单位叶面积Pn、高Tr及低WUE，并且在生长发育过程中表现出很低的根／地上生物量比、较高的叶面积比和单位叶面积干重，说明它们具有相对高的生长速率，这与其生长发育节律相一致，反映了它们与准噶尔荒漠环境相适应的特点。

As pioneer plants, desert spring ephemerals play an important role in community succession, biodiversity maintenance and dune stabilization in desert ecosystems. We studied the diurnal changes in gas exchange of three desert spring ephemerals (Eremopyrum orientale, Malcolmia scorpioides, and Tetracme quadricormis, hereafter the genus names only) under natural conditions in the desert area of the Dzungaria Basin.

采用LI-6400便携式光合测定仪，在晴天条件下对准噶尔荒漠3种典型短命植物东方旱麦草、卷果涩芥和四齿芥的气体交换特征的日变化规律进行了研究。

The total ephemeral load was significantly higher on consolidated substrata than on large perennial algae, but we were unable to detect any systematic increase in the abundance of these ephemerals with increasing nutrient richness.

但是我们发现随营养浓度的升高，这些藻类丰富度并没有系统的升高。

In 1997,our English club has been set up. But for many reasons, it has been the ephemerals and didn't last for long.

早在1997年，我们的英语俱乐部就成立了，但是由于各种原因，没能维持多久。

The main aim of the present study was to address: 1 the photosynthetic characteristics and the biomass allocation traits of spring ephemerals and 2 the relationship between these traits and unique growth pattern of thes.

准噶尔荒漠分布的早春短命植物不仅具有十分独特的生物学特点，而且在荒漠植物群落演替、物种多样性维持及土壤改良与防治水土流失等方面具有重要的生态学价值。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。