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황종서 한국농공학회 2000 韓國農工學會誌 : 전원과 자원 Vol.42 No.5
The fishways at Namdae-cheon and Osib-cheon were investigated from July 1998 through October 1999. There are three types of fishways on these rivers. those are baffied fishway, fish ladder, and fish ladder with gabion. Namdae-cheon has 7 baffled fishways and 19 fish ladders, and Osib-cheon has 7 gabion fishways. On namdae-cheon, 1,775 fishes of 24 species were collected. Among these fishes, 452 fishes of 11 species were anadromous fishes occupying 46% in species and 25% in number. On Osib-cheon, 1,953 fishes of 24 species were collected. Among these fishes, 483 fishes of 5 species were anadromous fishes occupying 21% in species and 25% in number. On Namdae-cheon the species number and abundance decreased gradually upstream. The poor structure of fishways seems to have worked as an obstacle to the upstream migration of fishes in the Namdae-cheon . On Osib-cheon all the observed fish species except three-spined stickleback(Gasterosteus aculeatus aculeatus) which stay and spawn around downstream of fiver could migrate upstream. The good structure of fishways on this river is thought to have helped upstream fish migration.
토양산도조정에 따른 사탕무우 , Beta vulgaris L. 붕소결핍증의 출현에 관하여
황종서(Chong Ser Hoang),임경빈(Hyong Bin Im),임웅규(Ung Kyu Lim) 한국식물학회 1979 Journal of Plant Biology Vol.22 No.1-2
Sandy loam plots of pH 5.5 which was created by the reclamation of highlands in Yongin county, Kyeonggi province, was selected for the present experimental study. Sugar beet was cultured in these plots by treating them with calcium hydroxide and 3 replications to maintain pH 5.5, 6.4, 6.8, 7.2, and 7.6, respectively. The growth and yield of sugar beet were investigated and the results obtained showed a great deal of boron deficiency. The growth in its early stage was favorable in high pH plots, while no significant difference was observed in sugar content, root weight and sugar production at the time of harvest in each treated plot. The tendency of sugar accumulation appeared to be identical in terms of pattern in each treated plot; i.e. sugar was accumulated until early September but declined momentarily from the middle of September and then the sugar accumulation was resumed from the middle of October. The number of individuals in boron deficiency was larger in high pH plots and the condition of such boron deficiency was also severe. The result of analysis of boron contained in plant body revealed that the boron content of individuals caused boron contained deficiency by water culture and that occurred in the plots was small alike. The appearance of boron deficiency is characterized by the emergence of black stripes on the surface of the basal part of petiole, severe necrosis of young leaves in the area of growing point and severe wrinkles. Therefore it is felt necessary to pay particular attention to boron deficiency in the culture of sugar beet in our country.
황종서 ( Hwang Chong Seo ),허협 ( Hur Hyub ) 한국농공학회 1999 한국농공학회 학술대회초록집 Vol.1999 No.-
The fishways on Namdae-cheon and Osib-cheon and the use of migratory fishes were investigated from July 1998 through June 1999. There are three types of fishways on these rivers. Those are baffled fishways, fish ladder, and fish ladder with gabion. Namdae-chcon has 7 baffled fishways and 19 fish ladder, and Osib-cheon has only fish ladder with gabion. On Namdae-cheon 1,195 fishes of 24 species were collected. Among these fishes 241 fishes of 9 species were anadromous fishes occupying 38% in species and 19% in number. On Osib-cheon 1,015 fishes of 24 species were collected. Among these fishes 240 fishes of 5 species were anadromous fishes occupying 21% in species and 24% in number. On Namdae-cheon the species number and abundance decreased gradually upstream. The poor structure of fishways seems to have worked as an obstacle to the upstream migration of fishes on Namdae-cheon. On Osib-cheon all the observed fish species except three-spined stickleback (Gasterosteus aculeatus aculeatus) which stay and spawn around downstream of river could migrate upstream. The good structure of fishways on this river is thought to have helped upstream fish migration.
황종서 ( Hwang Chong Seo ),허협 ( Hur Hyub ) 한국농공학회 2000 韓國農工學會誌 : 전원과 자원 Vol.42 No.5
The fishways at Namdae-cheon and Osib-cheon were investigated from July 1998 through October 1999. There are three types of fishways on these rivers. Those are baffled fishway, fish ladder, and fish ladder with gabion. Namdae-cheon has 7 baffled fishways and 19 fish ladders, and Osib-cheon has 7 gabion fishways. On namdae-cheon, 1,775 fishes of 24 species were collected. Among these fishes, 452 fishes of 11 species were anadromous fishes occupying 46% in species and 25% in number. On Osib-cheon, 1,953 fishes of 24 species were collected. Among these fishes, 483 fishes of 5 species were anadromous fishes occupying 21% in species and 25% in number. On Namdae-cheon the species number and abundance decreased gradually upstream. The poor structure of fishways seems to have worked as an obstacle to the upstream migration of fishes in the Namdae-cheon. On Osib-cheon all the observed fish species except three-spined stickleback(Gasterosteus aculeatus aculeatus) which stay and spawn around downstream of fiver could migrate upstream. The good structure of fishways on this river is thought to have helped upstream fish migration.
황종서 한국수자원학회 2000 한국수자원학회논문집 Vol.33 No.5
1999년 4월부터 11월까지 전남 영암의 영암호 갑문식어도에서 매주 1회씩 어도로 들어오는어류를 채집한 결과 25종 116,014개체를 채집하였으며, 이중 웅어, 줄공치, 숭어 등 10종이 하천과 바다를 오가며 서식하는 회유성어류로 전채개체수의 99.5%를 차지하였다. 회유성어류중 개체수로는 줄공치, 빙어, 웅어 숭어의 순으로 많이 채집되고 이들 4종이 전 채집 개체수의 99%에 해당하고 나머지 6종은 매우 드물게 채집되었다. 빙어는 63%가 7월 2 The dimension of the fishlock at the Youngam Lake is 6.6m wide and 30m long, and it has been used for both fish migration and ship passage. The capacity of attraction freshwater is , and the water depth of the fishlock varies between 1.9m - 5.7m due to th