金鱼藻

This may be due to hydrolytic chelating, precipitation and the sediment or hydrobioes attachment, absorption etc. The honewort had stronger ability of accumulating La because of its large leaf surface that could attach La. The accumulating ability of snail and fish to La was relatively weaker but some organs of them had higher contents of La especially in the intestines, shell of snail, and in gill, internal organs, scales, head, bone of fish, rare in muscle. The total accumulating quantities of La in each component of simulated aquatic ecosystem were a decreasing order of: sediment ＞honewort＞snail＞fish, and the sequence of bio-concentration facter was as follows: honewort＞snail＞fish.

2金鱼藻对La有较强的富集能力，主要通过枝叶表面吸附、吸收而富集；螺蛳对La也有一定的富集，并主要分布于肠、壳中，螺头中积累相对较少；草鱼对La的富集能力相对较弱，进入鱼体的La主要集中在鳃、内脏、鳞及头、骨中，肌肉中积累量较少；按质量计，稀土元素La在模拟水生态系统各部分中的积累量依次为：底泥＞金鱼藻＞螺蛳＞草鱼；各水生生物对稀土La的生物富集因子依次为：金鱼藻＞螺蛳＞草鱼。

It publishes a quarterly journal distributed world-wide, The Bryologist, which includes articles on diverse aspects of the biology of mosses, hornworts, liverworts, and lichens.

它出版的季刊《苔藓植物学家》在全世界发行，刊登生物学中关于苔藓、金鱼藻、地钱和地衣等各方面的研究文章。

As an extension to the "973" Program of National Planning key basic research project -----the study of China lake nutrient over-enrichment process and the mechanism of blue alga outbreak, this paper introduces our experiments as below:(1) Experiment on heavy metal absorption and disorption abilities of Ceratophyllum demersum , Hydrilla verticillata and Myriophyllum triphyllum, in order to campare their absorption capability .

本文在前人的研究基础上，依托国家&973&国家重点基础研究规划项目&湖泊富营养化过程与蓝藻水华暴发机理&，开展了下列工作： 1、选取狐尾藻、金鱼藻、黑藻三种大型沉水植物作为研究对象，通过对重金属离子铜离子的吸附及解吸实验，比较其三种沉水植物之间吸附能力的大小； 2、选取狐尾藻、黑藻为研究对象，研究了重金属离子铜离子对沉水植物的胁迫作用及铜离子在植物体内的富集情况； 3、选取黑藻为研究对象，研究了沉水植物在富营养条件下不同浓度的氨态氮和硝态氮对沉水植物的生理生长的影响。

Three Gorges Reservoir Area ; tributary ; Ceratophyllum demersum ; Hydrilla verticillata Royle ; presentation ; countermeasure

三峡库区；次级河流；金鱼藻；黑藻；现状；对策

Lemna gibba L., Ceratophyllum demersum L., Hydrocotyle ranunculoides L., and Rorippa nasturtium-aquaticum L. were also present.

浮萍gibba属，金鱼藻，荽ranunculoides研究，并风水田，水生植物研究也出席了会议。

Results showed that aquatic plants such as Ceratophyllum demersum,Vallisneria spiralis,Ipomoea aquatica,Lemna minor and Potamogetom crispus Linn had the great ability to remove total nitrogen,total phosphorus,nitrate nitrogen and ammonia nitrogen in eutrophicated water.

结果表明：金鱼藻、苦草、空心菜、浮萍和菹草对富营养化水体中总氮、总磷、硝态氮、氨氮都有较好的去除作用，其中以空心菜和金鱼藻效果最好。

(1) In the sorption kinetics experiment, Cu2+ sorptions by Ceratophyllum demersum, Myriophyllum triphyllum and Hydrilla verticillata respectively, all reached balance within 35mins, all of the test results of sorption kinetics recommended the pseudo second-order equation and indicated that this kind of sorption was a complicated process of simultaneous actions of many reactions. The test results of thermodynamic sorption fitted with Langmuir model better than Freundlich model, and the maximum sorption quantites were 13.12, 20.12, 7.79mg/g, respectively,In the desorption test, the desorption rates of each plants were all below 1%, indicating strong sorption-holding action of these submersed mcrophytes on Cu2+.

通过上述研究，得到以下结论： 1、狐尾藻、金鱼藻、黑藻在对铜离子的吸附动力学实验中，均在35min内达到吸附平衡，分别用一级动力学方程和伪二级动力学方程拟合，结果均为用伪二级动力学方程拟合效果较好，表明该吸附为多种反应同时作用的复杂过程；在热力学实验中，三种植物的吸附曲线都能较好的用Langmuir曲线拟合，其拟合最大吸附量分别为13.12、20.12、7.79 mg/g；在解吸实验中，三种植物的解吸率都较低，说明对铜离子都有较好的吸持能力。

In order to remove different concentrations of suspended sediment, a serial connected system of emerging plants, floatingleaved plants and submerged plants based on spatial distribution of natural water body was constructed by aquatic marcrophytes, such as Cyperus alternifolius, Acorus tatarinowii, Trapa japonica, Ceratophyllum demersum, Hydrilla verticillata and Vallisneria spiralis. Sandy water then flew through emerging plants, floatingleaved plants and submerged plants.

根据自然水体湿生植物、浮叶植物以及沉水植物的空间分布规律，利用风车草、石菖蒲、菱、金鱼藻、轮叶黑藻和苦草等水生植物构建由挺水植物、浮叶植物到沉水植物的串联系统，含沙水依次流经挺水植物、浮叶植物和沉水植物，测定各级植物对泥沙的去除效果。

Hornworts; liverworts having a thalloid gametophyte; in some classification systems included in the class Hepaticopsida.

金鱼藻；有叶状配偶体的地钱；在有些分类中，被归于苔纲中。

In order to remove different concentrations of suspended sediment, a serial connected system of emerging plants, floating-leaved plants and submerged plants based on spatial distribution of natural water body was constructed by aquatic marcrophytes, such as Cyperus alternifolius, Acorus tatarinowii, Trapa japonica, Ceratophyllum demersum, Hydrilla verticillata and Vallisneria spiralis. Sandy water then flew through emerging plants, floating-leaved plants and submerged plants.

根据自然水体湿生植物、浮叶植物以及沉水植物的空间分布规律，利用风车草、石菖蒲、菱、金鱼藻、轮叶黑藻和苦草等水生植物构建由挺水植物、浮叶植物到沉水植物的串联系统，含沙水依次流经挺水植物、浮叶植物和沉水植物，测定各级植物对泥沙的去除效果。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。