Study On The Effect Of Purification Of Myriophyllum Aquaticum And Other Four Kinds Of Plants To The Eutrophic Water

The wave eutrophication is an important problem of water pollution. There has been some researches showing that wave eutrophication having appeared, to some extent, in some lake landscape, reservoir, river, pond and housing estate in some areas of Chongqing. The test is based on simulating a manpower by the fact that interior formulating nutrient solution water cultivates originally wet land, the wave controlling going down the Acorus calamus L., Pontederia cordata, Scirpus validus Vahl and Myriophyllum aquaticum in different condition and so on having the wet land plant viewing and admiring value to eutrophication is hit by the effect that nitrogen phosphorus contents dislodge, and is burning weight study Chongqing introduce a fine variety plant big get together algae different condition lower face to face wave middle nutrition element absorbing ability Ji Qi different condition lower growth condition. Conclusion as follows:(1) Acorus calamus L., Pontederia cordata and Scirpus validus Vahl have obvious purifying effect on wave eutrophication. After planting the three plants above, the NH4+-N in the water respectively decrease in different extends. All the eutrophication wave has gone down to its varying degrees equally, the trend handling NH4+-N thickness go down respectively is basically identical,10 d queens, NH4+-N thickness is that 2 mg/L group of N processing NH4+-N in two handling to the wave than thickness is 4 mg/L and 8 mg/L-takeoff rate high, reach 97.35%.3 kinds plant are in proper order to water NH4+-N takeoff rate:Acorus calamus L.> Pontederia cordata> Scirpus validus Vahl..Every handles general TP of wave thickness go down condition under different thickness, as the wave is hit by NH4+-N thickness go down condition,10 d queens, TP thickness reaches 93.5% for 1 mg/L group of the height handling the takeoff rate being hit by TP to the wave than thickness is 2 mg/L and 4 mg/L. The 3 kinds plant takeoff rate to wave middle TP is in proper order:Acorus calamus L.> Scirpus validus Vahl.> Pontederia cordata..(2) The test result of different factors combinations affected by Myriophyllum aquaticum brasiliense Cambindicates proves, initial thickness of NH4+-N is 2 mg/L when planting density chooses 6 patch of box, NH4+-N take off effect is best in Myriophyllum aquaticum to the wave, take off rate is each other more maximal than other factor combination experiment when water level chooses 15 cm (test a water box originally); To the TP test result, think that plant planting density chooses 6 patch of box, initial thickness of TP is 2 mg/L, TP take off effect is best in Myriophyllum aquaticum to the wave, take off rate is all higher than other factor combination experiment when water level chooses 15 cm (test a water box originally).(3) Under the condition of wave eutrophication in different levels, the Myriophyllum aquaticum takeoff rate being hit by NH4+-N and TP to the wave parts from 76%,51.25%,56.13% for 72.38%,45.75%, 49.69%, take off rate being hit by NH4+-N and TP under water level to the wave in diversity parts from 69.25%,59.75%,49.25%for 66.16%,56.13%,50.25%, Take off rate being hit by NH4+-N and TP under the condition cultivating density to the wave in diversity parts from 41.5%,52.15%, 58.75% for 30.25%,49.38%,74.88%. That the population the middle nutrition of Myriophyllum aquaticum pair of eutrophication wave element greatly dislodges result all is comparatively good.(4) Amounts living things change is not big, but living things amounts can't exceed big with the thickness increasing by under the calamus being in with Myriophyllum aquaticum being unlike condition. The Acorus calamus L. living things amounts under different thickness condition are 9.97 g/plant (dry weight),11.11 g/plant (dry weight) and 12.81 g/plant respectively (dry weight). Myriophyllum aquaticum being unlike lower living things of condition amounts excursions between 1.259～2.505 g/plant (dry weight), living things amounts are among them when cultivating density being 2 patch of box/lowest, living things amounts are maximal during the period of initial thickness is maximal, plant's living things expects that with the thickness increasing by but enhances gradually under different thickness condition,; Under different water level condition, plant's living things increases by gradually with the water level power-up living things amounts; The effect to plant living things amounts is not especially big, g/plant (dry weight) issues whose value all in 2 under different planting density. By reaching the accumulation Myriophyllum aquaticum pair of nitrogens phosphorus greatly to the Acorus calamus L. with estimating that Myriophyllum aquaticum greatly being hit by nitrogen contents and phosphorus contents to the ability is higher than calamus.(5) The grow of different plants vary in different experimental,during which the best is the Acorus calamus L. and Myriophyllum aquaticum brasiliense Cambindicates. The experimental period Acorus calamus L. has not presented the death and the leaf withered and yellow phenomenon, the big dog's-mouth is slow-growing in the experimental initial period, the experiment later period grows good, the germination lateral bud are many, and the color of leaves is bright. Shui Cong grows the next best, after the mullet grass and the wick grass experiment, presents the death phenomenon.