• Journal of Wetlands Research
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• v.5 no.2
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• pp.67-81
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• 2003

Vegetation structure was investigated in the Hwapo wetland around the Nakdong-gang, Gimhae-city, Gyeongsangnam-do, Korea from May to August, 2001. The vegetation type was classified into 18 communities based on the actual vegetation map: Phragmites communis community, Miscanthus sacchariflorus community, Salix nipponica community, Echinochloa crus-galli var. frumentacea community, Zizania latiofolia community, Cyperus amuricus community, Spirodela polyrhiza community, Trapa japonica community, Phragmites communis-Miscanthus sacchariflorus community, Salix nipponiaz-Misaznthus sacchariflorus community, Cyperus amuricus-Acorus calamus var. angustatus community, Salvinia natans community, Hydrilla verticillata-Spirodela polyrhiza community, Persiazria maackiana community, Trapa japonica-Salvinia natans community, Hydrilla verticillata community, Potamogeton crispus community, and Populus deltoides community. Among them, Phragmites communis community was the largest (34.9 ha, 29.53%). The dominant vegetation type was Persiazria hydropiper - Persicaria maackiana community based on the phytosociological method, and it was classified into four subcommunities: Phalaris arundinacea-Salix nipponica subcommunity, Miscanthus sacchariflorus subcommunity, Phragmites communis subcommunity, and Spirodela polyrhiza subcommunity, and Acorus calamus var. angustatus group belongs to Miscanthus sacchariflorus subcommunity.

• Korean Journal of Environmental Biology
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• v.41 no.4
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• pp.657-665
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• 2023

The root-lesion nematode Pratylenchus spp. is the most important plantparasitic nematode due to its worldwide distribution, wide host ranges, and migratory endoparasitic characteristics. One population of Pratylenchus collected from the giant pussy willow (Salix chaenomeloides Kimura) in the Andong area as part of a nematode survey in Korea was characterized morphologically and by molecular methods. The analysis of morphological measurements and morphometric characteristics, as well as DNA sequencing of the rRNA large subunit (LSU) D2/D3 expansion segments and the internal transcribed spacer (ITS) gene sequence, confirmed the identity of this population as P. hippeastri. This study is the first report of P. hippeastri associated with Salix chaenomeloides in Korea and worldwide. Further studies on distribution and pathogenicity in different P. hippeastri host crops, such as grapevines, strawberries, and apples, are necessary. The taxonomic keys to 16 Pratylenchus species in Korea are provided.

• Journal of Wetlands Research
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• v.2 no.1
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• pp.95-107
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• 2000

The population dynamics of Salix nipponica and S. koreensis and the sediment factors were investigated in the wetland of the Nam-River. Chinju. Gyongsangnam-do, Korea. Each population of S. nipponica and S. koreensis was divided into four stages during the riverbed sedimentation: the first stage of establishment by S. nipponica, the second stage of coexistence by S, nipponica and S. koreensis, the third stage of dominated by S. koreensis, while S. nipponica was decreased during the increase of the water table in the sediment, and the fourth stage of the climax by S. koreensis, while S. nipponica almost died when the water table was twice to the third stage. Tree height, age, and density of S. nipponica were decreased, while S. koreensis increased along the sedimentation. And the composition of understory species showed no differences in each stage. The water table and the clay content affected on the distribution of Salix spp. in each stage, according to the PCA. The water table and the clay content increased during the sedimentation, while the other factors were almost the same.

• Journal of Korean Society of Forest Science
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• v.86 no.3
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• pp.311-318
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• 1997

Chemical properties of soil(N, P, K, Ca, Na, Mg, CEC, and pH) were studied after annual additions of $NH_4NO_3$(336kg/ha N), treble superphosphate(112kg/ha P), and KCl(224kg/ha K) fertilizers in a willow(Salix spp.) bioenergy plantation. Soil samples were collected from November through December 1992 from previously established the fertilized and non-fertilized willow plantation at Tully, New York, U.S.A. in 1987. Total fertilizer additions from 1987 through 1991 were 1,680kg/ha N and 560kg/ha P and 1.120kg/ha K. Fertilization with N, P, and K resulted in no difference in total soil N content between the fertilized and non-fertilized plots, increased soil P and K, decreased base cations ($Ca^{2+}$ and $Mg^{2+}$) and soil pH, and increased soil pH with soil depth. Strong positive correlations of soil carbon to soil N, Ca, Mg, and CEC were noted. Soil C/N ratio in the study plots ranged from 9.6 to 11.2 for all treatment combinations. Significant differences in soil P, K, Ca, and pH between the fertilized and non-fertilized plots indicate that fertilization had changed chemical properties of soil in this fertilizer trial.

• Journal of Korean Society of Forest Science
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• v.99 no.3
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• pp.292-297
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• 2010

This study was carried out to provide preliminary data to purify contaminated sites by nickel (Ni). After rooted cuttings of Salix reichardtii had been grown in Ni solution (hydroponic culture), pH changes in the solution and the accumulated Ni amount in plant parts were measured and analyzed. When the Ni concentration was low enough for S. reichardtii cuttings to grow well, the pH value of the solution decreased considerably. As the Ni concentration got higher, the plant growth got poorer and the pH value decreased slowly. Roots accumulated the highest Ni amount. Leaves and stems followed after. When stems were older, the accumulated Ni amount was lower. more Ni was accumulated in the plant parts which had more flexible tissue and live cells. As the Ni concentration in solution got higher up to 50.0 ${\mu}mol$/L, so did the Ni accumulation in the plant parts. However, the plant individuals nearly died and the Ni accumulation tended to drop when the Ni concentration in solution was 100.0 ${\mu}mol$/L. The rooted cuttings of S. reichardtii grew poorer as the Ni concentration in solution got higher. The plants in solution with 100.0 ${\mu}mol$/L of Ni were practically dead in four weeks.

• Journal of Wetlands Research
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• v.23 no.3
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• pp.201-212
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• 2021

In wetland protection areas, a phytosociological research was conducted on willow forests, which plays an important ecological and environmental role and is the main material for ecological restoration. A total of 61 relevés were collected according to the Z-M(Zürich-Montpellier) school's method and the characteristics of plant communities and the composition of the species were identified. A total of 9 plant communities including 237 taxa were differentiated. Willow species showing the high r-NCD(relative net contribution degree) value in study areas were Salix koriyanagi, Salix chaenomeloides, Salix triandra subsp. nipponica, Salix gracilistyla and Salix pierotii. Poaceae was the most diverse in species, followed by Asteraceae, Apiaceae, Polygonaceae and Fabaceae. Life form type of willow forests in wetland protection areas was determined to be Th(therophytes)-R₅(non-clonal form)-D₄(clitochores)-e(erect form) type. The naturalized plants and invasive alien species were identified as 24 taxa and 4 taxa, respectively. Naturalized and disturbance indices were 10.1% and 41.4%, respectively. The results of the site-species ordination by Non-Metric Multidimensional Scaling(NMDS), wetland types and altitude gradient were the main ecological factors determining the spatial distribution of plant communities. Diversity index and evenness index were high in mountainous palustrine wetlands with relatively high altitude, and the disturbance index, naturalized index and appearance rate of annual plant were high in riverine and lacustrine wetlands with low altitude.

• 한국생태학회:학술대회논문집
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• 1998.05a
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• pp.94-94
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• 1998

• The Korean Journal of Ecology
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• v.13 no.2
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• pp.143-148
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• 1990

During the autumn of 1985, the stem cortex of Salix pseudo-lasiogyne on the street sides in Seoul city was collected by a cork borer. The contents of S, Pb and Cd in this sample were determined. The ranges of S, Pb and Cd contents in all the samples were 0.98-3.46$\mu$/g, 0.77-1.81$\mu$g/g and 0.12-0.28$\mu$/g, respectively. Areas which slowed the highest level of S, Pb and Cd in the stem cortex were Yongon-dong, Yongdungp o, Ulchiro, Ch ongnyangni, Shinch on and Suyu-dong, Yongdungp o, Ulchiro and Ch ongnyangni, and Yongon-dong, Yongdungp o and Ch ongnyangni, respectively

• Korean Journal of Plant Resources
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• v.11 no.3
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• pp.326-334
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• 1998

Vascular cambium in 16 species of Salicaceae is nonstoried in all of them and is made up of fusiform and ray initials. The growth of cambial girth occurred by pseudotransverse division of fusiform initials and subsequent apical intrusive growth of daughter initials. The measurements of fusiform initials in tangerntial sections have revealed that the average length varies from 252.2-437.1${\mu}{\textrm}{m}$ in investigated species, with the maximum being in Populus euramericana and the minimum in Salix purprea var. Multinervis. The length of fusiform initials depends on the length of the tapering end wall , therefore, the longer the length of the tapering end wall, therefore, the longer the length of the taperding end wall, the longer the length of fusiform initials. Ray initials have their own size, magnitude, and frequency of occrrence in each species. The relative proportion of ray initials fall about 15.0-24.5% in Salicaceae. Shrubby species of Salix have a lower ratio of ray initials than the species which possess wider trunks. New ray initials are originated from cut off the side or the end of fusiform initials and central partition of a fusiform initials.

• Proceedings of the PSK Conference
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• 2000.04a
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• pp.190.2-190.2
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• 2000