• Asian-Australasian Journal of Animal Sciences
• /
• v.15 no.1
• /
• pp.34-37
• /
• 2002

Two experiments were conducted to evaluate the nutritional value of common fodder tree leaves with goats fed at 50% of total ration. In experiment 1, leaves from six fodder tree species i.e., Ailanthus aitissima, Elaeagnus angustifolic, Morus alba (Mulberry), Populus spp, Robina pseudoacacia and Salix babylonia were harvested in spring and winter from northern areas of Pakistan. Chemical composition and apparent in situ dry matter digestibility (DMD) of fodder tree leaves were measured. Results showed that crude protein (CP) values were higher (p<0.05) in all the species during spring compared to winter (17.9% vs 12.0%). The concentration of NDF in Elaeagnus and Robinia was higher in spring, whereas no seasonal difference was found in other species. In situ DMD was higher (p<0.05) in Ailanthus and Populus at spring while it was higher (p<0.05) in Elaeagnus, Mulberry and Robinia at winter. There was no (p<0.05) seasonal effect on in situ DMD of Salix. In experiment II, four iso-nitrogenous and iso-caloric rations viz., A, B, C and D were prepared containing 50% (winter harvested) sun dried leaves of Salix, Robinia, Mulberry and Elaeagnus, respectively and 50% concentrate. Dry matter and crude protein intakes were higher (p<0.05) given ration A (Salix) whereas DM and CP digestibility was lowest (p<0.05) given ration B. Nitrogen retention was higher (p<0.05) given ration A. Goats fed on fodder tree leaves and concentrate showed moderate intake and digestibility.

• Journal of Korean Society of Forest Science
• /
• v.86 no.2
• /
• pp.177-185
• /
• 1997

The influences of fertilizer treatment and clones of five willows and one hybrid poplar on above ground and soil carbon (C) accumulations in a willow bioenergy plantation were studied. The aboveground and soil samples were collected in the winter of 1992 and 1993 from the previously established willow plantation at Tully, New York, U.S.A. in 1987. Half of the plots were fertilized annually with 336kg/ha N, 112kg/ha P, and 224kg/ha K. All trees were harvested annually. The most productive clone, willow clone SV1 with fertilization, accumulated 5.4 and 6.8 t/ha/yr aboveground C contents during the sixth(1992) and seventh(1993) growing seasons, respectively. The average percentage of C in bolewood, bolebark, and branches for the five willow clones and one hybrid poplar clone ranged from 51.1 to 57.5, from 54.0 to 55.4, and from 55.6 to 56.5, respectively, among all treatment combinations. Only tyro of the six clones(SA22 and SA2) responded significantly to the addition of fertilizer by increasing the amount of aboveground C accumulated for the 1992 sampling period(clone-by-fertilizer interaction). No fertilization effect, on aboveground C content, was noted for the 1993 sampling period. No significant fertilization effect on soil C accumulation for all soil sampling depths(0-10, 10-20, and 20-40cm) was found in 1992 and 1993 sampling years. Little clone effect on soil C content was found in 1992 and 1993 sampling years, except at 0-10cm soil depth in 1992. The significant clonal effect on soil C content at 0-10cm soil depth could be because of stone content variation rather than clonal effect. The significant clone-by-fertilizer treatment interaction observed requires that evaluation of response to fertilization by willows be made for each clone individually.

• 보존과학연구
• /
• s.25
• /
• pp.197-226
• /
• 2004

This study was made to identify species of archaeological wood products excavated from three sites(Kwunbuk-ni, Gungnamgi, Wanggung-ni) of Sabi Era, Baekje. These sitesare presumably considered as capital areas of Sabi Era, Baekje. Total of 220 specimens were identified into five softwoods and eighteen hardwoods. Pinus densiflora(or Pinusthunbergii) and Quercus spp. are the most common and occupied 32%, 28% of totalspecimen, respectively. The others are follows : Torreya nucifera(1%), Abiesholophylla(3%), Cryptomeria japonica(4%), Thuja spp.(2%), Chamaecyparisobutusa(2%), Salix spp.(1%), Platycarya strobilacea (3%), Alnus spp.(1%), Carpinusspp.(0.5%), Castanea crenata(9%), Zelkova serrata (6%), Celtis spp.(0.5%), Prunusspp.(2%), Rhus verniciflua(1%), Rhus trichocarpa(0.5%), Meliosma oldhamii(1%),Hovenia dulcis(1%), Kalopanax pictus(0.5%), Cornus walteri(0.5%), Styrax japonica(1%),Fraxinus rhynchophylla (0.5%), F. sieboldiana(1%).Most of the identified species have been growing in this area until nowadays. However,a few species(Cryptomeria japonica, Thuja spp. Chamaecyparis obutusa, Torreyanucifera) didn’t grow natively around this area at that time. Two species(Cryptomeriajaponica, Chamaecyparis obutusa) are endemic species of Japan, indicating international trade or exchange of woods between Baekje Kingdom and Japan in 6-7th century. Torreyanucifera grows in limited areas in Korea (south of $35^{\circ}$10′N), however, is widely distributed in the southern Japan. Quercus spp. was identified the most in implements of Baekje and Pinus densiflora(orPinus thunbergii) was in the second place. Zelkova serrata was mainly used for raw materials of turnery products, e.g., wooden container. This species produces one of the hardest woods as 0.7 in specific gravity. It indicates that iron technologies have reached some high level in Sabi Era, Beakje.

• Journal of Conservation Science
• /
• v.5 no.1 s.5
• /
• pp.87-93
• /
• 1996

This study was carried out to Identify wood and charcoal segments, which were excavated in 1994 at the Seohaean highway construction site along the western coast of Korea ; Tuntaeri, Hwasunggun. We identified the objects excavated at the fire places of the Tuntaeri dwelling sites (early Koryo period ; A. D. $11\~12C$) ; charcoal pieces and 1 wood segment, which was used for the handle of a metal hook. Chestnut(Castanea crenata), deciduous oaks(Quercus spp.) and maple(Acer app.) were identified from the charcoals, whereas the wood segment as willow species(Salix spp.). These species seem to represent warm and wet climate in the middlewest Korea during $11\~12C$.

• Conservation Science in Museum
• /
• v.9
• /
• pp.95-104
• /
• 2008

Wooden objects excavated from Gwangju Shinchang-dong, we analyzed total 40 pieces consisting of 37 pieces for analysis of species of trees, 3 pieces for analysis of lacquer. and especially it was found that in case of lacquerware and living goods like dish, diffuse-porous woods were used. As a result of this, total 7 species of trees used for wooden objects identified are Quercus spp., Cearsus spp., Prunophora spp., Acer spp., Salix spp., Populus spp. were identified. As a result of analyzing lacquered film, though there is a difference of times of lacquering between holed lacquerware and cylider type lacquerware body part 5, it was confirmed that after undercoating, black pigments and lacquer were painted on upper layer in mixture, and foundation platter for with 5 parts lacquer ware was undercoated with mixture of powdered soil, black pigments and lacquer, and then its upper layer was coated with lacquer mixed with black pigments.

• Korean Journal of Plant Tissue Culture
• /
• v.25 no.3
• /
• pp.207-217
• /
• 1998

Total of 78 strains were characterized based on the morphological characteristics of colonies isolated on Schroth, and New & Kerr's media for selection of hypervirulent wild-type Agrobacterium spp from galls, hairy root-like process and soil of Populus, Malus, Salix and Diopyros in Korea. Among them, 48 strains were able to induce tumors in carrot disc. Hypervirulent A. tumefaciens SP101 and SM042 were identified as biotype 1 and biotype 2, respectively, These strains formed fast growing, larger tumors as compared to those induced by other strains. The binary vector pGA643 with kanamycin resistant gene was mobilized from E. coli MC100 into A. tumefaciens strain SM042 isolated from soil, and/or disarmed vector PC2760 using a triparental mating method with E. coli HB101/pRK2013, and transconjugants, A. tumefaciens SM643 and PC643 were obtained in minimal media containing kanamycin and tetracycline. Tobacco tissues were cocultivated with conjugant Agrobacterium and then transferred to selective medium with 2,4-D and kanamycin to induce the transformants. Calli were formed more efficiently in cocultivation with A. tumefaciens SM643 than that with A. tumefaciens PC643. Most of calli transformed with A. tumefaciens PC643 were friable and regenerated into normal plantlets, while the calli transformed with A. tumefaciens SM643 were compact, hard, and mixed with friable calli. The friable calli formed normal shoots, while compact calli did not form shoots but only grew to typical compact tumor calli. When the shoots formed directly from tobacco stems without callus induction after transformation by A. tumefaciens SM643 with wild-type Ti-plasmid, normal transformed plants can be induced without using disarmed Ti-plasmid.

• Journal of the Korean Society of Environmental Restoration Technology
• /
• v.16 no.1
• /
• pp.27-53
• /
• 2013

This study is carried out to offer raw data and establish strategy for conservation and restoration of river ecosystem by objective surveying and analysing the flora and vegetation distributed in Hwang river, Gyeongsangnam-do. The flora identified in this site were 406 taxa including 95 families, 252 genera, 360 species, 3 subspecies, 40 varieties and 3 forms. The rare plants were 3 taxa including Sagittaria sagittifolia subsp. leucopetala, Hydrocharis dubia and Acorus calamus. The endemic plants were 4 taxa including Populus tomentiglandulosa, Salix koriyanagi, Paulownia coreana and Weigela subsessilis. The specific plants by floristic region were 17 taxa including Salix siuzevii, Poncirus trifoliata, Potamogeton maackianus and so forth. The naturalized plants were 39 taxa including Phytolacca americana, Chenopodium glaucum, Lepidium virginicum, Oenothera erythrosepala, Xanthium canadense, Lolium multiflorum and so forth. The invasive alien plants were Ambrosia artemisiifolia and Ambrosia trifida. The whole NI and UI were each 9.6% and 13.9%. The hydrophytes were 27 taxa including Marsilea quadrifolia, Nymphaea tetragona, Ceratophyllum demersum, Trapa japonica and so forth. In the results of growth forms of the hydrophytes, emergent species were 14 taxa, 3 taxa of floating-leaved species, 4 taxa of free-floating species and 6 taxa of submerged species. The dominant vegetations were Salix spp. community, Miscanthus sacchariflorus community, Phragmites japonica community and Phragmites communis community.

• Korean Journal of Environment and Ecology
• /
• v.29 no.1
• /
• pp.62-68
• /
• 2015

In order to get basic data for flood plain restoration, we surveyed the woody vegetation in Korean natural rivers and analyzed the species' characteristics with regards to patterns of richness and diversity. These characteristics were higher in hard wood forests than those in soft wood forests, such as Salix spp. community. Futhermore, they were the highest in the Prunus sargentii-Pinus densiflora community(H' 1.095), and the lowest in the Carpinus laxiflora community(H' 0.118) among the hard wood forests. Species' richness diversity were the highest in the Salix gracilistyla community, but the lowest in the S. koriyangi community or S. koreensis community among the soft wood forests. With regards to the dominant index, just one community is over 0.9, 13 communities are between 0.3-0.7 and 15 communities are less than 0.3. The Salix koreensis community was the highest at 0.931, and Prunus sargentii-Pinus densiflora community was the lowest at 0.13. Species' richness and diversity was significantly correlated with tree layer coverages and degree of slope. These results mean that in order to increase plant species diversity in flood plains planted hard woody trees, such as oaks and fir, are needed to suit environmental conditions with steeper slope and lower canopy coverage.

• Journal of Wetlands Research
• /
• v.2 no.1
• /
• pp.95-107
• /
• 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 the Korean Institute of Traditional Landscape Architecture
• /
• v.38 no.4
• /
• pp.58-67
• /
• 2020

The present study was conducted as part of basic research for selecting species of street trees with historical value in Seoul. It also made up a list of traditional landscape trees for a variety of alternatives. The following results are shown below. As to the history of street trees in Korea, records on to-be-estimated street trees are found in historical documents written in King Yangwon during the second year of Goguryeo Dynasty (546) and King Myeongjong during 27 year of Goryeo (1197). However, it is assumed that lack of clarity is found in historical records. During the 23 year of King Sejong in the early Joseon Dynasty (1441), the record showed that the state planted street trees as guideposts on the postal road. The records revealed that Ulmus spp. and Salix spp. were planted as guidance trees. The street tree system was performed in the early Joseon Dynasty as recorded in the first year of King Danjong document. Pinus densiflora, Pinus koraiensis, Pyrus pyrifolia var. culta, Castanea crenata, Styphnolobium japonicum and Salix spp. were planted along the avenue at both left and right sides. Morus alba were planted on streets during the five year of King Sejo (1459). As illustrated in pieces Apgujeong by painter Jeongseon and Jinheonmajeongsaekdo in the reign of King Yeongjo, street trees were planted. This arrangement is associated with a number of elements such as king procession, major entrance roads in Seoul, place for horse markets, prevention of roads from flood and indication. In the reign of King Jeongjo, there are many cases related to planting Pinus densiflora, Abies holophylla and Salix spp. for king procession. Turning king roads and related areas into sanctuaries is considered as technique for planting street trees. During the 32 year of King Gojong after opening ports (1985), the state promoted planting trees along both sides of roads. At the time, many Populus davidiana called white poplars were planted as rapidly growing street trees. There are 17 taxa in the Era of Three Kingdoms records, 31 taxa in Goryeo Dynasty records and 55 taxa in Joseon Dynasty records, respectively, described in historical documents to be available for being planted as street trees in Seoul. 16 taxa are recorded in three periods, which are Era of Three Kingdoms, Goryeo Dynasty and Joseon Dynasty. These taxa can be seen as relatively excellent ones in terms of historical value. The introduction of alien plants and legal improvement in the Japanese colonial period resulted in modernization of street tree planting system. Under the six-year street tree planting plan (1934-1940) implemented as part of expanding metropolitan areas outside the capital launched in 1936, four major street trees of top 10 taxa were a Populus deltoides, Populus nigra var. italica, Populus davidiana, Populus alba. The remaining six trees were Salix babylonica, Robinia pseudoacacia, platanus orientalis, Platanus occidentalis, Ginkgo biloba, and Acer negundo. Beginning in the mid- and late 1930s, platanus orientalis, Platanus occidentalis were introduced into Korea as new taxa of street trees and planted in many regions. Beginning on 1942, Ailanthus altissima was recommended as street trees for the purpose of producing silks. In 1957 after liberation, major street tree taxa included Platanus occidentalis, Ginkgo biloba, Populus nigra var. italica, Ailanthus altissima, Populus deltoides and Salix babylonica. The rank of major street tree species planted in the Japanese colonial period had changed. Tree planting trend around that period primarily representing Platanus occidentalis and Ginkgo biloba still holds true until now.