• 제목/요약/키워드: Standing crop

검색결과 155건 처리시간 0.018초

광릉의 송백림에 있어서 종다양성, 현존량 및 토양양분에 관한 연구 (Studies of Species Composition and Standing Crop and Soil Nutrients in Conifer of Kwangnung Forests)

  • 신창남;장남기
    • 아시안잔디학회지
    • /
    • 제9권4호
    • /
    • pp.317-329
    • /
    • 1995
  • The study of standing crop of the ground vegetation under the coniferous stands was pursuited in regard of soil nutrients at Kwangnung plantation from May to Octoher, 1971 and 1991. The coniferous stands implied pine and larch associations of which the young stands of each as-sociation were 9~12 years and the older one 40~70 years. The larch stands were more plentiful in species than in the pine stands and the Festuca ovina and Oplismenus burmannii each were dominant species of pine and larch stands. The standing crop of pine stands is from 98.02g /$m^2$ to 385.32g /$m^2$ The standing crops of those stands showed great increase from June to August when the air temperature and rainfall were fairly high. The standing crop has correlation to total nitrogen and organic matter in the soil.

  • PDF

한반도 중서부 초본식생에 있어서의 최대현존량과 종밀도와의 관계에 대하여 (On Relationship between Maximum Standing Crop and Species Density in the Herbaceous Vegetaton of West Central Korea)

  • 오규칠
    • Journal of Plant Biology
    • /
    • 제26권3호
    • /
    • pp.161-171
    • /
    • 1983
  • To test whether the Grime's model on relationship between maximum standing crop plus litter (350~750g/$m^2$) and species density (10~30/0.25$m^2$) fit well or not, a total of 52 samples, with 4 replicate plots (0.5m$\times$0.5m each) per sample, was collected from various forests, grass lands and coastal salt marshes in midwestern part of central Korean peninsula from September to October in 1982. The result agrees well with the model for grass lands salt marshes, that is, shape of curve for the maximum standing crop (minus litter) against species density indicates normal distribution. The number of species was 11 for the grassland and 7 for the salt marshes within the range of 300g to 700g per square meter for the maximum standing crop. In forest stands, however, as the maximum standing crop of herbs increased the species density decreased. The Grime's model does not seem to fit with the resutls on forest stands of this study. It is examined further the relationships among the maximum standing crop, species density and eleven soil properties, and the possible cause of this discrepancy was disscused.

  • PDF

철원지구 비무장지대 초지의 지력에 Standing Crop의 변동에 관한 연구 (The Standing Crop and Edaphic Factor of Grasslands in Chuiwon near the D.M.Z.)

  • 이정혜;장남기
    • 아시안잔디학회지
    • /
    • 제8권1호
    • /
    • pp.37-46
    • /
    • 1994
  • We study on the standing crop and edaphic factor of grasslands in Chulwon near the D.M.Z. The widespread and most abundant grasses are Arundinella hirta and Miscanthus sinensis in the upland fields of D.M.Z. The vascular flora of grasslands in Umi-dong and Sukda-dong near the D.M.Z. and composed of total 25 species, the most important of which ace Arundinella hirta and Miscanthus sinensis These two species contribute greatly to the standing crop of live naterial was in excess of $107.6g /m^2$. Correlation between standing ccop and water content, organic matter, total nitrogen, or avail-able phosphorus of grassland soils in area studied is high significant. It is argued that these edaphic factors affect the growth of grasses in Umi-dong and Sukda-dong grasslands.

  • PDF

한국 해안식물의 생태학적 연구 - 남해안의 사구식물군락의 종조성과 현존량 (Ecological Studies on the Coastal Plants in Korea-Floristic Compositon and Standing Crop of the Sand Duen on the Southern Coast)

  • Lee, Woo Tchul;Sand-Keun Chon
    • The Korean Journal of Ecology
    • /
    • 제6권3호
    • /
    • pp.177-186
    • /
    • 1983
  • Vegetation types and their standing crop in the sand dune on the south coast of Korea was investigated by the method of Curtis, J.T. and McIntosh, R.P. (1951). The relationship between vegetation types and environmental factors was also analyzed. The dominant species in the vegetations of the south coast sand dune were Carex pumila, Calystegia soldamella, Imperata cylindrica var. koenigii, Vitex rotundifolia, Ixeris repens, Carex kobomugi, Zoysia macrostachya. The species density in the sand dune vegetation increased with the distance from the coast, psammophyte and rhizome psammophyte decreased with the distance from the coast but other plants increased. The standing crop of the sand dune vegetatiion was average $53.79g/m^2$. An individual standing crop of Vitex routundifolia and Carex kobomugi varied with the curve of secondary degree. The salt content of the sand dune soil from 2.95 to 11.78 mg %, and it was not significant differences among stands, but it was varied with the distance form the coast. Negative relationship between warmth index and aboveground standing crop was found and the formula y=283.8886 - 2.4910X could be estimated.

  • PDF

억새초지의 현존량과 토양의 형태적 특성에 관한 연구 (Studies on the Relationship between Standing Crop of Miscanthus sinensis Grassland and Soil Morphological Characteristics)

  • 박봉규
    • Journal of Plant Biology
    • /
    • 제21권1_4호
    • /
    • pp.7-12
    • /
    • 1978
  • The results of the relationship between standing crop of Miscanthus sinensis grassland and soil morphological characteristics are as follows. The Miscanthus sinensis grassland seems to grow well in volcainc ash soil. The depth of A layer was closely related to the standing crop of the Miscanthus sinensis grassland. The root systems of Miscanthus sinensis reached to its maximum in A layer. The root systems of Miscanthus sinensis showed its maximum at 20mm and below(soil hardness). The soil texture of A layer showed SL-SiL. The soil structure of A layer contained Massive-Small Granular. The soil colors of A layer expressed Dark Yellowish Orange-Brownish Black.

  • PDF

경기도 6개 호소의 수질 영양단계 및 지표종에 관한 연구 (Water Trophic States and Biological Indicators of Phytoplankton at Six Reservoirs in Gyeonggi-do)

  • 임안숙;이옥민
    • ALGAE
    • /
    • 제22권2호
    • /
    • pp.69-85
    • /
    • 2007
  • From six reservoirs in Gyeonggi-do, we have collected the distribution and standing crop of phytoplankton since Nov. 2005 through Sep. 2006. As a result, the phytoplankton appeared totally 340 taxa belong to 7 classes, 15 orders, 5 suborders, 32 families, 4 subfamilies, 84 genera, 283 species, 43 varieties, 9 forms and 5 unidentified species. The standing crop was shown as minimum was 0.3 × 106 cells and maximum was 5,950 × 106. The relation of standing crop with TN, TP and Chl-a showed as positive. Total 12 taxa including 2 taxa of blue-green algae occurred to every seasons at six lakes, and it was thought that they distributed in mesotrophic state. Also, Achnanthes minutissima, Aulacoseira granulata, Eudorina elegans, Gloeocystis ampla, Pandorina morum, Pediastrum simplex var. duodenarium, Scenedesmus ecornis were regarded as the indicators of eutrophic state. From the estimation of LTSI and TSI, it was shown that the rest of lakes except for Idong reservoir of winter were eutrophic states.

海安 鹽濕地 植生의 純生産性 推定法의 比較 (Comparison of Estimation Methods for Primary Net Production at Herbaceous Coastal Marsh Vegetation)

  • Ryu, Beung Tae;Joon-Ho Kim
    • The Korean Journal of Ecology
    • /
    • 제8권3호
    • /
    • pp.133-140
    • /
    • 1985
  • Aboveground net productions of four stands in the coastal salt marsh of Incheon were estimated with three different methods: first method was to measure peak live standing crop; second to measure both live and dead standing crops; thrid to measure live and dead standing crops and dead disappearance as well. Net productions estimated by the first method were lowest with a difference of 28~50% from those by the third method. Whereas estimates by the second method approximated considerably to those by the third method with a difference of 4~15%. The third method figured out the highest values and seemed to be most appropriate in estimating net production of herbaceous community. Form these results it is known that live standing crop, dead standing crop and dead disappearance respectively accounted for about 60, 30, 10% of net production estimated by the third method. Annual net productions estimated by the third method for Suaeda japonica-Salicornia herbacea, Artemisia scoparia-Limonium tetragonum, Calamagrostis epigeios, and Sonchus brachyotus-Setaria viridis stand were 650, 1, 080, 1, 409 and 1, 126 g.$m^{-2}.yr^{-1}$, respectively.

  • PDF

관악산의 잔디와 억새 생태계에 있어서 에너지의 흐름과 무기물의 순환 1. 현존량과 물질 생산구조 (The Energy Flow and Mineral Cycles in a Zoysia japonica and Miscanthus sinensis Ecosystem on Mt. Kwanak 1. The Standing Crop and Production Structure)

  • 장남기;김정석;심규철;강경미
    • 아시안잔디학회지
    • /
    • 제9권2호
    • /
    • pp.101-107
    • /
    • 1995
  • A Zoysia japonica and Miscanthus sinensis grasslands of north-west side on Mt. Kwanak were investigated The most important species in this area were Zoysia japonica and Miscanthus sinensis These two species contributed greatly to the standing crops of live material, which were in excess of 598. 4g /$m^2$ and 698. 7g /$m^2$ during the growing season, respectively. This value would he ucreased if the production of the moss and algal mats which cover the soil surface during the growing season was included. The productive structures of the Zoysia japonica and Mliscanthus si nen sis grasslands were short and long height types of the grasslands, respectively. Key words: Standing crop, Production structure.

  • PDF

한국의 식생에 있어서 $C_3, C_4$ 및 CAM 식물의 분류, 생산력 및 분포에 관한 연구 2. $C_3;와;C_4$형 식물의 물질생산과 생산력 (Studies on the Classification, Productivity, and Distribution of $C_3, C_4$ and CAM Plants in Vegetations of Korea(II. Production and Productivity of $C_3; and; C_4$Type Plants))

  • Lee, Sung-Kyu;Chang, Nam-Kee
    • The Korean Journal of Ecology
    • /
    • 제6권2호
    • /
    • pp.114-127
    • /
    • 1983
  • The production and productivity of $C_3 and C_4$ type plants in Korea was studcied In the areas, in which the summer temperature is above $30^{\circ}C,;C_3$ type plants showed“M” type productivity curves exhibiting two peaks in spring and autumn, and C4 type plants showd “Bell” type productivity curves which show one peak in summer(Figs. 1,2,3,4,5). From the result of researching the standing crop of $C_3 and C_4$type plants dcuring August and September in which the standing crop reaches the highest peak, the dominant plants in the natural grass vegetation were almost all of $C_4$ type plants, showing the high standing crop, while the standing crop of $C_3$ type plants shows its high peak in the humid areas, riversides and dams.

  • PDF

광양만 잘피밭에서 잘피와 착생해조류의 계절 변동 (Seasonal Variations of Eelgrass (Zostera marina) and Epiphytic Algae in Eelgrass Beds in Kwangyang Bay)

  • 허성회;곽석남;남기완
    • 한국수산과학회지
    • /
    • 제31권1호
    • /
    • pp.56-62
    • /
    • 1998
  • 1994년 1월부터 1994년 12월까지 광양만 대도주변 잘피밭에서 잘피 및 착생해조류의 계절 변동을 연구하였다. 잘피의 잎 길이는 수온이 낮은 겨울철에 100cm 이하의 낮은 수치를 보였으며, 봄철에 접어들면서 잎 길이가 계속 증가하여 여름철인 6월과 7월에는 조사기간 중 최고치인 200cm에 달하였다. 그러나 가을철에는 감소하는 양상이었다. 잘피의 현존량은 가을과 겨울에 낮았으나, 봄부터 현존량이 증가하기 시작하여 여름철에는 $200g\;DW/m^2$ 정도의 높은 수치를 나타내어 잎 길이의 계절변동과 유사한 양상을 보였다. 잘피에 부착하여 서식하는 착생해조류는 봄과 여름철에 Calliophyllis rhynchocarpa, Champia sp. 등이, 가을과 겨울철에 Polysiphonia japonica, Lomentaria hakodatensis 등이 다른 종들에 비하여 우점하였다. 착생해조류의 현존량은 수온이 낮은 겨울철에 $30g\;DW/m^2$ 정도의 높은 수치를 보였으나, 수온이 증가하는 3월부터 현존량이 감소하여 여름철에는 최저치를 나타내었다. 그러나 9월부터는 현존량이 서서히 증가하는 양상을 보였다. 착생해 조류의 현존량은 잘피밭 식물 현존량의 $15\~20\%$를 차지하고 있었다. 잘피의 현존량과 착생해조류의 현존량은 수온의 영향을 많이 받는 것으로 나타났다. 잘피의 현존량은 수온과정 상관관계를 보인 반면, 착생해조류의 현존량은 역 상관관계를 보였다.

  • PDF