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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Korean Journal of Ecology
Journal Basic Information
Journal DOI :
The Ecological Society of Korea
Editor in Chief :
Volume & Issues
Volume 9, Issue 4 - Aug 1986
Volume 9, Issue 3 - Jun 1986
Volume 9, Issue 1 - Feb 1986
Selecting the target year
An Application of a Plastochron Index for Nitrate Reductase Activity in Amaranthus retroflexus, Chenopodium album var. centrorubrum and Glycine max
Park, Bong-Kyu ; Joung-Hee Kim ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 1~7
plastochron index was used as a measure for the nitrate reductase activity (NRA) in Amaranthus retroflexus, Chenopodium album var. centrorubrum and Glycine max. The material plants treated with
-N had higher NRA than those treated with
-N. High NRA were found in young tissues which have low PI or LPI in both A. retroflexus and C. album. These results indicated that this enzyme decreased with increasing plastochron index of the extracted tissues. High level of NRA was detected in Glycine max leaves at PI 4.0. On the other hand, there were no significant differences for PI among
-treated and control in both stems and roots.
Comparison of the Pine Litter Decompositon and Microbial Population Change at Youngwal with Those at Sinlim
Chang, Nam-Kee ; Lee, Yong-Woo m ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 9~18
The decomposition of litters of Pinus densiflora and the growth of microbial populations in a calcareous region, Youngwal were compared with those in a noncalcareous region, Sinlim. The decay rate of litter in Pinus densiflora in Youngwal was 0.128 and that in Sinlim was 0.096. The differences in the populations of soil bacteria and total microorganisms between the two regions were signficant at the 5% level, but that of fungi and actinomycetes was not at that level. The differences in the content of calcium and pH value of soil between the two regions were significant at the 1% level. The excessive content of calcium became to increase pH value, in turn the high pH decreased the content of available phosphorus in soil. The vertical distribution of the content of available phsophorus was consistent with that of the populations of fungi and actinomycetes in Youngwal.
Effects of Temperature, pH, Light and Degree of Oxygen Supply on the Germination of Papaver somniferum L. Seeds
Lee, Ho Joon ; Sung Jong Kim ; Seon Ho Kim ; Se Young Kim ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 19~24
Effects of temperature, pH, light-and-dark and degree of oxygen supply on germination of Papaver somniferum L. seeds were investigated. The optimum temperature of the germination was 2
, but the germination was decreased as temperatures changed to the upper and lower. The largest elongation of both radicle and hypocotyl also occurred at 2
. The best germination occurred at pH 7 but this decreased suddenly the above and below of that pH value. Although no effect of light-and-dark on the germination was, this was restricted under limited. oxyten supply in terms of underwater germination as compared with abovewater one.
Vegetation Dynamics in Afforested Area of Yungil
Ri, Chong Un ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 25~31
A study was made on the change of vegetation in Yungil area after the erosion control works. The area was divided into three major areas, the devastated land area, the afforested area and the subclimax area. Two groups of plant, i.e., the common species in all area and the different species confined in the subclimax area, were identified by the interspecific correlation analysis based on the positive correlation value at 5% significance level. High similarity among the sites in the afforested region was indicated by the DIF (difference measure) value, lower than 0.33. However, the devastated area and the subclimax area were distinguished completely. The change in species diversity has been extremely low since the erosion control works. Robinia pseudo-acacia was the dominant species in the afforested region and showed an adequate growth status.
The Distribution of Giant Duckweed(Spirodela polyrrhiza) and Small Duckweed(Lemna aequinoctialis) at a lead-Zinc Mine Area
Park, Bong-Kyu ; In-Hye Oh ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 33~40
The distribution of giant duckweed (Spirodela polyrrhiza) and small duckweed (Lemna aequinoctialis) was investigated at lead-zinc mine area and the limiting factors for their distribution were studied by laboratory experiments. The metal investigated of water affected on the growth of giant duckweed and small duckweed. Under filed conditions, both giant duckweed and small duckweed did not persist at more acidic conditions than pH 4.8 or at conditions more than 0.30 ppm of Cd concentration. Giant duckweeds were intolerable, under conditiions with less than 0.30 ppm of Cd and above than 0.07ppm of Zn, but small duckweeds were tolerable under conditions of more than 0.07 ppm of Zn concentration. However, neither can live above 7.50ppm of Zn concentration. These field observations corresponded with the results of the laboratory experiments.
Estimation of the Net Primary Production in the Korean Peninsula
Yim, Yang-Jai ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 41~50
The net primary production in the Korean peninsula was estimated by Miami model, Montreal model and Kira's model, based on 148 meteorological data. The modes in frequency distribution of the values calculated by Montreal and Miami model were found at 1,500g/m2/yr. class and at one step high class in 100g. interval, while by Kira's madel at 1,700g/m2/yr. class. The relationships between values by Miami model(X) and those by Motreal model (Ym) and Kira's model(Yk) can be expressed as follows: Ym=0.365X+944.7, Yk=0.462 X+1006.9 and Yk=1.282Ym-211.5. The total amount of the net primary production in 218,583.4km2, 98.9% of the whole area(220,951 km2) of the Korean Peninsula, was estimated as 290,691,407 tons/yr. by Miami model, 310,751,566 tons/yr by Montreal model and 352,071,901 tons/yr by Kira's model. Therefore, it is reasonable that the organic substance over 300 million-tons is added yearly in the Korean Peninsula, because only 1.1% of the whole area no calculated. In additiion, the net primary production amount of Han-river basin was estimated as ca. 38 million-tons, whether calculated with the meteorological data in level of the Korean Peninsula or with more detail data.
A Study on the Decomposition of Litter and the Leaching of Mineral Nutrients in the Stands of Pinus rigida on Mt. Gwan-ak and Pseudosasa japonica on Odong-do
Chang, Nam-Kee ; Heui-Baik Kim ; Jun-hi Yoo ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 51~58
The decay rates of organic matter were investigated and the leaching rates were determined from the concentration distribution of N,P,K, Ca and Na in the soil profile at Pinus rigida stand on Mt. Gwan-ak and at Pseudosasa japonica stand on Odong-do. In order to determine the leaching rates θo/W wazs substituted with KL in Towner's equation. Decay rates were 0.191 at Pinus stand on Mt. Gwan-ak and 0.234 at Pseudosasa stan don Odong-do. Concentration distributions of N,P, K and Na in soil profiles were corresponed with Towner's model curve. Leaching rates determined from concentration distributions were 0.086, 0.079, 0.041, 0.029, 0.096 on Mt. Gwan-ak and 0.080, 0.056, 0.051, 0.008, 0.028 on Odong-do. The soil of Pseudosasa stand showed on the whole lower leaching rates than that of Pinus stand. The soil of Pseudosasa stand showing higher decay rate and lower leaching rates contained more concentration of each nutrient than that of Pinus stand.
Production Dynamics of Phragmites longivalvis, Carex scabrifolia and Zoysia sinica Stand of a Sand Bar at the Negdong River Estuary
Kim, Joon-Ho ; Kyung-Je Cho ; Hyeong-Tae Mun ; Byeong Mee Min ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 59~71
Net production, dead material increments were measured, and annual respiration loss was simulated through a year to determine the gross production at the Phragmites longivalvis, Carex scabrifolia and Zoysia sinica stand on Okryudeung, a sand bar of the Nagdong river estuary. The maximum live biomass for above-ground organs of the three stands occured in October, i.e., 1, 985, 744 and 1, 013g/m2, and belowground net productions were estimated to be 650, 440 and 412g/m2, respectively. Materials died or shedding from live aboveground organs during the growth season were estimated to be 167, 81 and 0 g/
. From the results of simulation, annual variation of respiratiion was primarily dependent on the annual variation of temperature through a year. For annual respiration loss in three stands, 21.893, 6.147 and 5.036kg
were calculated, respectively. Corresponding gross productions were 72, 203, 22, 109 and 19, 909kcal/
. Respiration of belowground organs corresponded to 65%, 66% and 37% of the total plant respiration, and annual respiration loss accounted for 85%, 78% and 71% of the annual gross production. In view of efficiency of solar energy utilization, 5.8%, 1.8% and 1.6% of incident light energy were converted to gross production of plants during a year. With incident light energy during the growth season from April to September, energy utilizations for net production were estimated to be 1.2%, 0.4% and 0.6% at the three stands.
The Effect of Energy Allocation on Competition of Chenopodium album and Digitaria sanguinalis
Park, Bong-Kyu ; Kim, Ok-Kyung ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 73~78
The effects of density and soil nutrient regime on competition between individuals in pure and mixed populations of two annuals. Chenopodium album and Digitaria sanguinalis were investigated at the level of enegy allocation. Seedling emergence of two species was extremely high (>90%) in both pure and mixed culture irrespective of the density and nutrient regime, but percentage of seedling establishment or fertile plant became gradually low with increasing density owing to 'self-thinning'. The mean plant dry weight was significantly reduced with increasing density and decreasing soil fertility. The dry matter production of D. sanguinalis in mixture was markedly greater than in pure culture under medium and high density. Also, as considered the number of seed production as reproductive allocation, relationship between them and the number of seed production per plant showed a similar tendency. Therefore, these results indicated that D. sanguinalis had a greater competitive advantage than C. album and energy allocations to variious organs were regulated by plastic response rather than determined genetically.
A Study on the Production and Decomposition of Litters, of Pine Forests in South Korea
Chang, Nam-Kee ; Nam-Chang Park ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 79~90
The production and decomposition of litters and nutrient cycling of forests were studied at the pine forests such as Pinus densiflora, Pinus koraiensis, Pinus rigida, Pinus thunbergii, Abies holophylla and Larix kaempfer. The annual litter production of the P. densiflora forest was the most on Mt. Mudeung which was 620.75g/
and the least on Mt. Halla which was 155.00g/
. The decay rate of litters was the highest at the P. densiflora forest on Mt. Mudeung which was k=0.256 and the lowest at the P. densiflora forest on Mt. Halla and A. holophylla on Mt. Jiri which were k=0.099. The half time of decomposition of litters was shortest at the P. densiflora forest on Mt. Mudeung and the longest at the P. densiflora on Mt. Halla and A. holophylla forests on Mt. Jiri. The average decay rate of the L. kaempferi forests which was k=0.204 was the highest and that of the A. holophylla forests which was k=0.122 was the lowest. The decay rate tended to decrease against increasing the altitude. The annual production of litterr, the contents of mineral nutrients and the amounts of mineral nutrients inputted into the forest soil tended to increase in proportion to the decay rate, k.
The Effect of Tread-Pressure on the Growth of Plantago asiatica Linne
Kim, In-Taek ;
The Korean Journal of Ecology, volume 9, issue 1, 1986, Pages 91~101
To investigate the distribution of Plantago asiatica Linne, almost, restricted on the road-side, the plant growth analyzed by experimental cultivation under the condition of tread-pressure; 10 times/day (7.33kg/
), 20 times/day (12.27kg/
), 30 times/day (20.05kg/
) and the control plot (1.68kg/
). The matter production in the 10-time-per-diem plot (7.33kg/
) of tread-pressure howed more large value than that inthe control one (1.68kg/
) and those in the 20-0time-per-diem plot (12.27kg/
) and the 30-time-per-diem one (20.05kg/
) small values than that of the control plot. Especially, the growth of roots and spikes was extremely repressed. The number of leaves, scapes and lateral buds tend to increase in the tread-pressure of 20 times/day (12.27kg/
) and 30 times/day (20.05kg/
). The water contents of roots along the increase of tread-pressure to continuosly decreased. By the increase of tread-pressure, T/R ratio and C/F ratio their group decreased. The plant growth (7.33kg/
) in the 10-time-per-diem plot increased more than that in the control one is regarded as the effect of tread-pressure affection on the road-side distribution of this plant.