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습지식물의 지상부 제거가 생산력과 영양염류 제거량에 미치는 효과
정연숙(Yeon Sook Choung),오현경(Hyun Kyoung Oh),노찬호(Chan Ho Roh),황길순(Kil Son Hwang) 한국환경생물학회 1999 환경생물 : 환경생물학회지 Vol.17 No.4
This work focused on the effects of the timing and the frequency of shoot cutting to maximize the productivity and the nutrient removal of three emergent macrophytes, Phragmites communis, Zizania latifolia and Typha angustifolia in natural wetlands. Shoot cutting significantly enhanced biomass production and resulted in more nitrogen and phosphorus removal from water in these three experimental species, compared to those of control. However, the frequency and the timing of shoot cutting, and the enhancement ratio were different among three species. For Phragmites stands, the highest productivity was 1.9 times of control in June treatment of the first year experiment, while 1.3 times in May treatment of the second year experiment. Zizania and Typha stands were both 1.2 times of control in August treatment and June and August treatment. Calculating the total annual removal rate of nitrogen and phosphorus based on the highest productivities among treatments, in Phragmites stands, 2.0 times of nitrogen and 1.8 times of phosphorus were removed in the first year, and both 1.4 times in the second year experiment. Likewise, for nitrogen and phosphorus; 2.4 and 1.8 times in Zizania stands, and 1.8 and 1.9 times in Typha stands were removed. Overall, these results suggested that cutting treatment of shoots be effective. Thus, shoot cutting of two times during a growing season were recommended to maximize the effects: that is, in May or June, and October for Phragmites stands, and in August and October for Zizania and Typha stands. [Shoot cutting, Productivity, Nitrogen, Phosphorus, Wetland, Phragmites communis, Zizania latifolia, Typha angustifolia, Emergent macrophytes, Water quality].
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김범철(Bom Chul Kim),전만식(Man Sig Jun),정근(Keun Chung),정연숙(Yeon Sook Choung),황길순(Kil Son Hwang) 한국환경생물학회 1999 환경생물 : 환경생물학회지 Vol.17 No.4
Distribution of biota and removal efficiency of organic matter in natural wetland systems were examined from June to October 1998. The aquatic macrophyte communities were consisted of 13 families and 22 species. The composition of occurrence species were as follows: Phragmites communis Trinius are 35%, Persicaria thunbergii Nakai are 19%, Typha angustifolia L. are 17%, Bidens tripartita L. are 16%, Echinochloa crus-galli(L.) Beauv. are 12% and others are 1%. The fauna collected from 5 sites consisted of total 6 classes of macroinvertebrates. The composition of occurrence classes were as follows: Insecta are 76%, Oligochaeta are 19%, Gastrapoda are 4% and others are 1%. These included 18 families, 7 orders of Insecta. The larve and mosquito and midges were found in wetlands. Preventive strategies are needed for the suppression of mosquito at the stage of wetland planning and design. In wetland, removal efficiency of dissolved organic carbon is low because of primary production and the background level of DOC in the wetland discharge seems to be 5 ㎎C/ℓ, but those of BOD was ca. 50%. Wetlands receiving water of low concentration can not work as purification field.[Biota, Organic matter removal, Wetland].
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