Effects of Grasses of Vetiveria and Pennisetum on Trophic Groups of Soil Nematodes

Studies on growth and development traits of Hybrid Pennisetum

杂交狼尾草生育特性研究

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unlike corn, which must be replanted every year, perennial grasses such as switchgrass and miscanthus preserve and increase carbon stores in the soil.

不像一年生的玉米，多年生的草本植物如柳枝稷和细叶芒可以增加土壤中的碳储量。

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they focused on corn, sugar cane, miscanthus, switchgrass and native prairie grasses.

重点关注了玉米，甘蔗，细叶芒，柳枝稷和北美草原的当地植物。

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the age structures of the tillers of the grass on both pastures for grazing and cutting uses are of an expanding type.

割草场和放牧场硬拂子茅无性系种群分蘖株均属于增长型年龄结构。

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calamagrostis rigidula is a typical clonal grass, with its tiller nodes kept alive as long as for4 years.

硬拂子茅是典型的无性系禾草，分蘖节存活时间最多为4年。

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this paper studied seasonal and spatial changes of biomass above-ground and under parts in the calamagrostis pseudophragmites community.

本文研究了假苇子拂子茅群落的生物量，测定了地上和地下生物量及其季节和空间变化。

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mattress are filled with feathers, cotton, or straw.

床垫里塞满了羽毛、棉花或草。

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but here it was no longer some isolated bush or a modest grove of low timber. it was an immense forest, huge mineral vegetation, enormous petrified trees linked by garlands of elegant hydras from the genus plumularia, those tropical creepers of the sea, all decked out in shades and gleams.

但在这里的，不是孤立隔开的珊瑚丛，不是低树林的丛木，而是，广大的森林，巨大的矿物草木，粗大的石树，由那些海葛藤，漂亮好看的羽毛草花圈坏结合起来，受到各样色彩和反光的点缀，非常好看。

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blue fescue is an ornamental grass which the time introduced to china is not long, but developed very fast, and the scope of application is rapidly expanding.

蓝羊茅是一种国内引进时间不长，但发展势头良好，应用范围不断扩大的观赏草，具有很高的观赏价值。

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method of ammonia media cough and phenol red on mice were used to value the effects of relieving cough and reducing sputum of tsrc;

采用小鼠氨水引咳法及气管酚红排泌法观察吉祥草总皂苷（TSRC）的镇咳及祛痰作用；

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objective to study the chemical constituents from the roots of reineckia carnea.

目的研究产自湖北长阳吉祥草正丁醇部位化学成分。

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the overall performance of the dominant directional selection, there is some disruptive selection pattern, showing that individuals in favour of earlier or later flowering. early flowering can increase the number of seeds and stigma pollens, late flowering can increase the seed set.

总体表现出定向选择占优势，存在部分分歧选择的模式。表明紫萼个体倾向于提早或延迟开花，早开花可以提高种子数和柱头花粉数，晚开花可以提高结籽率。

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the flowering synchrony was lower with only 0.17 to 0.34, there was significant difference in different years. 2, the relative flowering intensity frequency distributions of about 70%, indicating that hosta ventricosa has a higher relative intensity.

开花同步性较低，仅0.17-0.34，年际间差异显著。2、紫萼的开花强度分布频度在70%左右，表明紫萼具有较高的相对开花强度。

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we discussed the relationship between flowering phenology and bisexual fitness, and tried to explain the bisexual reproductive success with flowering phenology variations, and further understand the selection mechanism of flowering phenology and its adaptive significance.

探讨了紫萼开花物候与两性适合度的关系，并尝试用开花物候的变化来解释两性繁殖成功的变化，进一步理解紫萼开花物候的选择机制及其适应意义。

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the studies on introduction and cultivation of hosta plants have got some preliminary results, but are still at the exploratory stage.

目前玉簪属植物在园林绿化中的应用仍以白玉簪和紫萼为主，玉簪属植物的引种栽培研究虽取得了一些初步成果，但还处于探索阶段。

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the method was found to be also suitable for extracting rna from bryophytes such as grimmia pilifera etc.

该方法还可用于紫萼藓等藓类植物RNA的提取。

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the patterns of sex allocation within-inflorescences differed in three populations of hosta ventricosa.

主要研究结果如下：（1）紫萼三个种群中花序内的性分配模式都不同。

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If you take a more exotic material like cadmium selenide forms a big, black crystal

如果你拿一个比较稀有的材料比如硒化镉，会形成一块大的黑色晶体，

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A trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder.

一种三价非金属元素，或呈坚硬的黑色晶体状，或呈黄色或棕色粉末状。

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After the synthesis of new-diamond by using a method of catalyzed carbon black, the crystal structure of the new-diamond after various aging-treatment time was investigated by X-ray diffraction ( XRD).

利用碳黑催化法制备了新金刚石粉末，并通过粉末X射线衍射（XRD）对不同时效处理后的新金刚石样品进行表征。

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