With locally preponderant duckweed after selection and alternanthera philoxeroides cultivated in single species and accrete system, performance on removal efficiency of nitrogen and phosphorus in municipal wastewater and diluted anaerobically pretreated wastewater from a cattle farm were investigated.

以經(jīng)篩選得到的本地優(yōu)勢浮萍和水花生為研究對(duì)象，通過設(shè)置浮萍A4yy午夜一级、水花生單種和浮萍－水花生混養(yǎng)等三種體系欧美日韩口爆吞精一二区，考察了其對(duì)生活污水和稀釋的牛場厭氧廢水N、P的凈化效果欧美一级A片猛。

If the behavior is on the water potential of Lemna minor, is the root of the underwater, root and duckweed and how merge action and potential are not fragmented.

如果行為表現(xiàn)是水上的浮萍老师挤奶水A片无码网站，那么潛質(zhì)就是水下的根，根和浮萍又是如何連為一體国产欠欠自拍激情一集黄片？行為和潛質(zhì)其實(shí)并不是割裂的国产黄片免费看看。

Any of various small, free - floating,stemless aquatic flowering plants of the genus Lemna.

浮萍一種浮萍科小而無根，自由浮動(dòng)的水生開花植物

To check the abilities of Zn uptake and accumulation of duckweed (Lemna minor Linn.), experiments of growth, Zn accumulation and SOD activitial response to Zn in plant duckweed were performed with fresh plant in vivo. The results showed that growth of duckweed was affected by 5 mg/L Zn treatmenat in solution, indicating better resistance to Zn.

為探詢浮萍對(duì)水體Zn的吸收富集能力欧美激情偷乱人伦小说视，為水體Zn污染的植物修復(fù)提供依據(jù)，采用水培方法對(duì)浮萍的Zn的吸收富集特性及生物量露出在线、抗性進(jìn)行分析三级色频，同時(shí)也對(duì)Zn處理?xiàng)l件下，浮萍體內(nèi)SOD酶活性變化進(jìn)行了測定欧美A∨在线精品。

Under lab condition.［Result］ TN and TP concn. in the sewage were decreased constantly with the increase of duckweed treating time in 0-10 d. The purification ability of Spirodela Schleid on TN and TP was higher than that of Lemna L. The maximal removal rates of duckweed on TN and TP in sewage diluted at 5 times were 71.14% and 81.00% resp. and that in the sewage diluted 10 times were 92.18% and 91.33% resp.

結(jié)果］ 污水TN和TP濃度隨浮萍處理時(shí)間（0～10 d）增加而持續(xù)降低操操操操干干干干干；紫萍屬浮萍對(duì)TN和TP的凈化能力優(yōu)于浮萍屬浮萍；浮萍對(duì)稀釋5倍的供試污水TN和TP的最大去除率分別為71.14%和81.00%www干；浮萍對(duì)稀釋10倍的供試污水TN和TP的最大去除率分別為92.18%和91.33%亚洲Va欧美va国产综合久久。

By imitating different concentration of Cd2+ Cu2+ Cr3+ Cr6+and Zn2+polluted water environment,we mainly studied their toxic effects on aquatic piants by means of measurement of physiologicai indexes and electron microscopy observation as well as the relieving to Cu2+ injury of antioxidase enzyme system in Lemna minor L. and Vallisneria asiatica Miki in this paper by throwing Ce.the experimental results showed that Cd2+ Cu2+ Cr3+ Cr6+ and Zn2+ might injure photosynthetic systems, protective enzyme system, substance metabolism systems and cell ultrastructure of the plant.

本文通過模擬不同濃度梯度的重金屬Cd~(2+)、Cu~(2+)国产精品无码无套在线、Cr~(3+)亚洲欧美丝袜精品、Cr~(6+)和Zn~(2+)污染環(huán)境，利用生理生化測定黄色的视频在线免费看在、掃描電鏡最新自拍偷拍精品视频、透射電鏡、氣相色譜及激光共聚焦等實(shí)驗(yàn)手段性色在线观看视频免费网站，研究了四種金屬離子對(duì)不同生態(tài)型的水生植物的毒害影響AV毛片三级片在线观看，初步探索了Ce對(duì)浮萍Cu害的緩解效應(yīng)和La、Zn及其交互作用對(duì)浮萍活性氧清除系統(tǒng)影響超碰日韩精品在线看。

Conclusion］ Spirodela Schleid could be taken as the optimized duckweed variety that was suitable to purify N and P effectively in organic sewage in Yangtze River delta region.

結(jié)論］ 紫萍屬浮萍可作為適合長江三角洲地區(qū)的高效凈化氮磷有機(jī)污水的浮萍優(yōu)化品種欧美日韩精品综合在线一区二区。

Method］ With 3 kinds of representative local duckweed varieties selected from the each sample place in Yangzhou City and Kunshan City resp. as the tested materials and the anaerobic wastewater diluted at 5 times and 10 times from the cattle Farm as the tested sewage,10 groups of purification treatments matching with 5 different duckweeds on 2 concn. of sewage were set up to investigate the effect of different duckweed variety on the purification effect of N and P in sewage with different concn.

方法］ 從揚(yáng)州市和昆山市各采樣點(diǎn)選取的當(dāng)?shù)?種有代表性的浮萍品種為供試材料国模自拍日韩在线播放网站，以經(jīng)稀釋5倍、10倍的牛場厭氧廢水為供試污水98极品少妇精品视频，設(shè)置5種不同浮萍對(duì)2種不同濃度污水的10組凈化處理国产肏屄小视频，在實(shí)驗(yàn)室條件下考察了不同浮萍品種對(duì)不同濃度污水氮和磷的凈化效果。

The vat is covered with duckweed.Somebody put a small red flower into it, making it more beautiful.

古鎮(zhèn)上的水缸里長滿浮萍一级WWW，那朵小花是有人放進(jìn)去的三级爆乳黄片在线看，讓浮萍更美了。

SOD activity was at peak in 5 mg/L Zn treatmenat, indicating greater ability to eliminate ROS caused by excessive Zn. Zn contents in roots and thalluses of duckweed in vivo increased significantly with increase of Zn concentration in solution at 0-5 mg/L Zn. When Zn concentration was higher than 5 mg/L, Zn accumulation in duckweed was no more increased significantly. And, the plant was damaged by excessive Zn.

結(jié)果表明：在Zn濃度為5 mg/L時(shí)国产黄片,A片，浮萍生物量并沒有受到明顯的影響www.干干色，表現(xiàn)出較強(qiáng)的抗性；SOD酶活性也最高欧美性爱三级网站，表明清除氧自由基的能力也較強(qiáng)日本操毛小a片；Zn的積累隨處理濃度增加而增加，在5 mg/L Zn處理時(shí)www.天堂AV网站，也基本達(dá)到飽和狂插美女阴道动态，超過該濃度，吸收量則無明顯的變化国产一级AA片在线视频，同時(shí)浮萍也明顯受到傷害国产在线91免费。

duckweed：浮萍

當(dāng)鴨子從蓋滿 浮萍(duckweed)的池塘突然走出時(shí),我曾兩次看到這些小植物附著在它們的背上;并 且曾經(jīng)發(fā)生過這樣的事情:把一些浮萍從一個(gè)水族培養(yǎng)器移到另一個(gè)水族培養(yǎng)器里時(shí), 我曾無意中把一個(gè)水族培養(yǎng)器里的貝類移入到另一個(gè).

Lemna：浮萍屬

日本青萍6746(Lemna paucicostata 6746)屬單子葉植物浮萍科(Lemnaceae)浮萍屬(Lemna),是一種短日照植物,漂浮于水面生長,繁殖能力強(qiáng),生長周期短,在條件合適時(shí),培養(yǎng)17天即可開花.

Lemna：(七十)浮萍屬

十七人人摸草碰日日、浮萍科 Lemnaceae | (七十)浮萍屬 Lemna ** | 117浮萍Lemna minor Linn.

Lemna Linn：浮萍屬

無根萍屬 Wolttia Horkel ex Scbleid | 浮萍屬 Lemna Linn. | 浮萍 L.minor.L.

Lemna minor：小浮萍

(三十四)浮萍科Lemnaceae | 96.小浮萍Lemna minor | 97.紫背浮萍Soirodela polyrhiza

Lemna perpusilla：浮萍 (草本, 原生, 普遍)

25. Lemnaceae 浮萍科 | 48. Lemna perpusilla 浮萍 (草本, 原生, 普遍) | 49. Spirodela punctata 紫萍 (草本, 原生, 普遍)

Lemnaceae Lemna：浮萍屬

紫萍 Lemnaceae Spirodela polyrrhiza | 浮萍屬 Lemnaceae Lemna | 浮萍 別名:小浮萍 Lemnaceae Lemna minor

Lemnaceae Lemna minor：浮萍 別名:小浮萍

浮萍屬 Lemnaceae Lemna | 浮萍 別名:小浮萍 Lemnaceae Lemna minor | 香蒲科 Typhaceae

Spirodela：浮萍屬(浮萍科)

長螺旋細(xì)菌屬 Spirochaete | 浮萍屬(浮萍科) Spirodela | 螺生 spirodromy

Spirodela polyrrhiza：(浮萍)

因此浮萍生物量的增長速率決定了其對(duì)氮磷吸收轉(zhuǎn)化的能力.本研究采用序批式培養(yǎng)和連續(xù)式培養(yǎng)2種方式探討了細(xì)脈浮萍(Lemna aequinoctialis) 和紫背浮萍(Spirodela polyrrhiza) 在污水營養(yǎng)條件下的生長特性,