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象欧美精品日韩国产一区原创色，通過設(shè)置浮萍高清无码一道本、水花生單種和浮萍－水花生混養(yǎng)等三種體系日本va欧美在线看免费，考察了其對生活污水和稀釋的牛場厭氧廢水N黄色a级片免费网站、P的凈化效果。

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)是水上的浮萍国产久精品，那么潛質(zhì)就是水下的根欧美偷一区二，根和浮萍又是如何連為一體？行為和潛質(zhì)其實并不是割裂的少妇无码大屁股视频XXXX。

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99热，自由浮動的水生開花植物

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.

為探詢浮萍對水體Zn的吸收富集能力，為水體Zn污染的植物修復(fù)提供依據(jù)2020国产精品永久在线，采用水培方法對浮萍的Zn的吸收富集特性及生物量国产欧美日韩精品第一区、抗性進行分析，同時也對Zn處理條件下日本一道本男人天堂综合网，浮萍體內(nèi)SOD酶活性變化進行了測定黄片一级在线观看视频免费。

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濃度隨浮萍處理時間（0～10 d）增加而持續(xù)降低；紫萍屬浮萍對TN和TP的凈化能力優(yōu)于浮萍屬浮萍东北肥女人毛多水多性视频；浮萍對稀釋5倍的供試污水TN和TP的最大去除率分別為71.14%和81.00%性爱在线欧美；浮萍對稀釋10倍的供試污水TN和TP的最大去除率分別為92.18%和91.33%。

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+)亚洲性爱视频免费、Cu~(2+)欧美A片最新网址、Cr~(3+)、Cr~(6+)和Zn~(2+)污染環(huán)境日韩a无v码在线播放，利用生理生化測定搜锁一个能看的毛片网站、掃描電鏡、透射電鏡4455vw在线视频、氣相色譜及激光共聚焦等實驗手段黄网站在线观看视频免费，研究了四種金屬離子對不同生態(tài)型的水生植物的毒害影響，初步探索了Ce對浮萍Cu害的緩解效應(yīng)和La黄色网A片、Zn及其交互作用對浮萍活性氧清除系統(tǒng)影響AAAAA级黄色片。

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污水的浮萍優(yōu)化品種。

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］ 從揚州市和昆山市各采樣點選取的當(dāng)?shù)?種有代表性的浮萍品種為供試材料肏屄性爱欧美性爱，以經(jīng)稀釋5倍免费黄色日本视频、10倍的牛場厭氧廢水為供試污水，設(shè)置5種不同浮萍對2種不同濃度污水的10組凈化處理男女配种，在實驗室條件下考察了不同浮萍品種對不同濃度污水氮和磷的凈化效果亚洲一级在线毛片。

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，那朵小花是有人放進去的黄色视网站免费网址，讓浮萍更美了在线免费观看国产黄色A片高清。

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，浮萍生物量并沒有受到明顯的影響国产高清在线A免费视频观看_日韩特黄，表現(xiàn)出較強的抗性亚洲伊人成无码91；SOD酶活性也最高国产免费三级片视频，表明清除氧自由基的能力也較強；Zn的積累隨處理濃度增加而增加3344在线视频免费播放，在5 mg/L Zn處理時金发白妞AV在线播放，也基本達到飽和，超過該濃度中文字幕在线观看公司，吸收量則無明顯的變化美女色色色网站，同時浮萍也明顯受到傷害。