芦苇的

The limitless bulrush field which produces over 30,000 ton bulrush is a natural park on the lake.

无限芦苇场生产的三点〇万吨芦苇是一个自然公园的湖。

The basal diameter, height of aerial stem, leaf length at middle stem, leaf width at middle stem, internode length at middle stem, internodes number and panicle length of 30 plants from every population were recorded. The statistics of morphological characters showed that the distribution trends of the averages of morphological characters are similar among populations. However, the coefficients of variation within population of 7 morphological characters were very different. The CV of internodes was largest and the CV of height was smallest within population. F-statistics showed that the differences of all morphological characters among populations were significant (P.01). But the differences among populations were different between different groups. The cluster analysis proved that all populations could be divided into three types: salty reed, freshwater reed and giant reed.

对来自每个种群的30个个体的基径、株高、中部叶长、中部叶宽、中部节间长、节间数、穗长7个形态特征的统计分析表明：各形态特征平均值在种群间的分布趋势相似，但变化幅度不同，株高、叶长等营养特征变化较大大，生殖特征穗长的变化较小；7个形态指标在种群内的平均变异度从大到小依次为中部节间长、中部叶宽、穗长、中部叶长、基径、节间数、株高，种群内的平均形态变异度与生境异质性有关；7个形态指标在种群间均差异显著，但多重比较分析显示显著差异主要存在于BZH、淡水生境种群和盐渍化生境种群之间，在相似生境种群间的形态差异不显著；以形态特征为依据的聚类分析支持将15个种群分为三类：盐生芦苇、淡水芦苇和巨型芦苇。

Based on the established GIS of the Oncomcelania Snails' distribution in Dongting Lake, the author analyzes the environmental condition of the Oncomcelania Snails' habitates comprehensively by the spatial analyzing technology. The results are as following: firstly, the predominant vegetation of Oncomcelania Snails habitat is reed and sedgy. The habitats with reed has a higher livability than with sedgy as dominating vegetation. However, the diffusion of Oncomcelania Snails is much serious in the habitats with sedgy. Secondly ,the predominant soil type of the Oncomcelania Snails breeding area is temporary submergic paddy soils, which is in weak acidity environment, of that PH value is 5.5--7.5, and the organic content is in 2---3%. Thirdly, the 80 percent of the Oncomcelania Snails breeding area, the normalized difference vegetation index of that is in 0.100-0.375%, and the soil humidity of that is in 0.202—0.507, and the distance to the water of that is in 10-230 meters.

在已建立的洞庭湖区江滩钉螺分布地理信息系统的基础上，运用GIS空间分析技术，对钉螺孳生地的环境状况作了比较全面的分析，发现洞庭湖区江滩钉螺孳生地植被类型主要为芦苇和莎草类，钉螺在莎草地带中的存活率高于芦苇地带，而钉螺感染情况最严重的在芦苇地带中；孳生地的土壤类型主要为潴育性水稻土；孳生地土壤PH值处于5.5-7.5之间的弱酸性环境，有机质含量处于2-3%之间；80%孳生地的植被标化指数在0.100-0.375之间、土壤湿度在0.202-0.507之间、近水源距离为10-230之间。

Phragmite australis is a kind of helophyte,the submergence and the ground water depth have effect on the growth.

芦苇是一种喜水性植物，地表淹水程度和地下水埋深对芦苇生长都有明显的影响。

Reed is used in many areas for thatching roofs.

用途芦苇是保护湿地环境和野生动物的重要物种，许多种鸟类栖息在芦苇丛中。

Any of various tall perennial grasses, especially of the genera Phragmitesor Arundo,having hollow stems, broad leaves, and large plumelike terminal panicles.

芦苇：不同种高大的有中空的茎、宽大的叶、大型羽毛状顶部圆锥花序的多年生植物中的任一种，特别是芦苇属禾本科和芦苇属的植物

It usually occurs 5 generations each year and overwinters on the reed stalk in nymphal and adult stages.

宫苍仁蚧在江苏沿海滩涂的芦苇上，年发生4～6代，以成、若虫在芦苇茎秆上越冬。

It was 7.25% in saline algae zone, 31.25% in Scirpus marqueter/Scirpus triqueter zone and 47.06% in reed zone;(3) The avian density undergoes declination with the development of wetland vegetation succession.

对全年不同演替阶段鸟类群落进行相似性比较，芦苇带与海三棱藨草带／藨草带的相似性系数S_1=0.5442，海三棱藨草带／藨草带与盐渍藻类带S_3=0.6182，芦苇带与盐渍藻类带S_2=0.2585。

Through boring and gathering water in natural reed wetland, the concentration of three kinds of nitrogen (nitrate-N, nitrite-N and ammonia-N) and the quantities of denitrifying bacteria in the soil of different depths were sampled and analyzed in the bloom period of reeds.

在芦苇生长旺盛阶段（3-5月），在芦苇湿地钻孔，聚水，取样分析了水中三氮含量及水孔不同深度土壤中反硝化细菌的数量。

Rumored ancient hill triangle for the East China Sea since the middle triangle山林间also unique to the water reed, Phragmites australis leaves Shell also mixed with the sea.

据传三角山远古时为东海，至今三角山林间还产着水乡特有的芦苇，芦苇丛中还夹杂着海螺壳。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。