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QUANTITATIVE EVALUATION OF WATER PURIFICATION ABILITY IN AN AQUATIC PLANT

水生植物净水能力的定量评价

基本信息

批准号：
13650603
负责人：
ENARI KEIJIRO
金额：
$ 2.18万
依托单位：
TOHOKU INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650603/
关键词：
Zizania latifolia nitrogen absorption phosphorus absorption annual amount element content nutrients removal wetland system リン吸収量窒素除去

项目摘要

In this study, two experiments in a water culture inhibiting the nitrification and denitrification were conducted to evaluate the ability of nitrogen and phosphorus absorption by Zizania latifolia from May to December in 2001 and 2002 (32 weeks). The results were as follows : The wet weight, the amount of water absorption, the amounts of Total Inorganic Nitrogen (TIN) and phosphorus (PO4-P) absorption by Zizania latifolia increased along with growth of Zizania latifolia. The maximum wet weight was taken in October (636g) or September (562g). The maximum dry weight was taken in October, 2002 (78.5g) and the amount of the whole experimental period (2001) of water absorption was 74.5kg. The maximum amount of TIN and PO4-P absorption of Zizania latifolia were taken in September, which value were 629mg・4weeks-1 and 133mg・4weeks-1, respectively. The amounts of the whole experimental period of TIN and PO4-P absorption were 3150mg and 631mg, respectively. Finally, the results showed that 5.4mg … More of TIN and 1.1mg of PO4-P were required for Zizania latifolia to grow 1g of wet weight. In 2002, The N and P content of a Zizania latifolia was increased from May to October, and the maximum values taken were about 2080mg and about 400mg, respectively. The N and P mass balance of the content of Zizania latifolia and the amount of removal from the culture solution from May to October (except September) was evaluated as 70%〜110%.In this study, an experiment was conducted to evaluate the ability of accumulation of nutrients and metals by Zizania latifolia. The results are as follows : It became clear the distribution of elements inside the body change with the season and the variation of the elements. The amounts of fixed elements in a Zizania latifolia were evaluated, and the maximum values of the C, N, P, K, Mg, Ca, Mn, Fe, and B content in a Zizania latifolia were 28690mg, 1756mg, 354mg, 954mg, 204mg, 149mg, 37.3mg, 15.9mg and 4.5mg, respectively.The following facts became clear through the experiments conducted in 2001, 2002, 2003 and 2004. The amount N and P absorption of Zizania latifolia was increased significantly in the early growth stage (from May to Jul.) and the maximum value of them was taken in September, the values were 680mg and 154mg, respectively. The amount of N and P absorption per wet weight of Zizania latifolia were changed from 15mg/g, 2.7mg/g (in May) to 0.03mg/g, 0.01mg/g (in Jan.), respectively. The amount of N and P absorption for whole year was calculated as about 3,600mg and 720mg, respectively. Less

本研究于2001年和2002年5 ~ 12月（32周）进行了两个抑制硝化反硝化作用的水培试验，研究了菰对氮、磷的吸收能力。结果表明：随着菰的生长，其湿重、吸水量、总无机氮（TIN）和磷（PO 4-P）的吸收量沿着增加。最大湿重出现在10月（636 g）或9月（562 g）。干重最大值出现在2002年10月（78.5g），整个试验期（2001年）的吸水量为74.5kg。菰对TIN和PO 4-P的吸收量在9月份达到最大值，分别为629 mg·4 wk-1和133 mg·4 wk-1。整个试验期的TIN和PO_4-P吸收量分别为3150 mg和631 mg。最后，结果表明，5.4mg ...更多信息菰每生长1g湿重需要1.1mg的TIN和1.1mg的PO_4-P。2002年，一株菰的N、P含量在5 ~ 10月呈上升趋势，最高值分别为2080 mg和400 mg左右。结果表明，在5 ~ 10月（9月除外），菰的氮磷质量平衡为70%~ 110%，菰对营养元素和重金属的积累能力较强。结果表明：人体内元素的分布随季节的变化而变化，元素的含量也随季节的变化而变化。测定了菰中固定态元素的含量，C、N、P、K、Mg、Ca、Mn、Fe和B的最大值分别为28690 mg、1756 mg、354 mg、954 mg、204 mg、149 mg、37.3 mg、15.9 mg和4.5 mg。通过2001年、2002年、2003年和2004年进行的实验，以下事实变得清楚。在生长前期（5 ~ 7月），施用氮肥显著增加了菰对氮、磷的吸收量。最大值出现在9月份，分别为680 mg和154 mg。菰对N、P的单位湿重吸收量分别由5月份的15 mg/g、2.7mg/g下降到1月份的0.03mg/g、0.01mg/g，分别全年N、P吸收量分别约为3, 600 mg、720 mg。少