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박인협,류석봉,이선하 ( In Hyeop Park,Suk Bong Ryu,Seon Ha Lee ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.2
Twelve Camellia sinensis populations were studied to investigate the biomass distribution related to stand structure. With increasing mean age of the population, mean root collar diameter increased, while mean height, density and root collar area had no correlation with the age. The result of dimension analysis after cutting the sample trees showed that dry weights of stems +branches and root were exponentially increased and dry weights of current leaves and twigs were linearly increased with increasing root collar diameter. However, the dry weight of older leaves was not related to the root collar diameter. The range of total biomass was 1,162∼11,474㎏/㏊ and the range of current leaf biomass was 165∼1,341㎏/㏊. The range of T/R ratio was 1.5∼2.8. The biomass of stems+branches and root were significantly correlated with the root collar area of the population and were not significantly correlated with the mean age, mean root collar diameter and density of the population. The biomass of current leaves and twigs were significantly correlated with the root collar area and density of the population.
왕대속 대나무림의 물질생산 및 무기영양물 분배에 관한 연구
박인협(In Hyeop Park),류석봉(Suk Bong Ryu) 한국산림과학회 1996 한국산림과학회지 Vol.85 No.3
Three Phyllostachys stands of P. pubescens, P. bambusoides and P. nigra var, henonis in Sunchon were studied to investigate biomass, net production and nutrient distribution. Five 10m×10m quadrats were set up and 20 sample culms of 2 years and over were harvested for dimension analysis in each stand. One year old culms and subterranean parts were estimated by the harvested quadrat method. The largest mean DBH, height and basal area were shown in P. pubescens stand, and followed by P. nigra var. henonis stand and P. bambusoides stand. There was little difference in accuracy among three allometric biomass regression models of logWt=A+B1ogD, LogWt=A+BlogD²H and logWt=A+ BlogD+ClogH, where Wt, D and H were dry weight, DBH and height, respectively. Analysis of covariance showed that there were significant differences in intercept among the linear allometric biomass regressons of three Phyllostachys species. Biomass included subterranean parts was the largest in P. pubescens stand(103.621t/㏊), and followed by P. nigra var. henonis stand(86.447t/㏊) and P. bambusoides stand(36.767t/㏊). Leaf biomass was 6.3% to 7.8% of total biomass in each stands. The ratio of aboveground biomass and subterranean biomass in each stand was 1.87 to 2.26. Net production included subterranean parts was the greatest in P. pubescens stand(6.115t/㏊/yr), and followed by P. nigra var. henonis stand(5.609t/㏊/yr) and P, bambusoides stand(3.252t/㏊/yr). The highest net assimilation ratio was estimated in P. pubeseens stand(2.979), and followed by P. nigra var. henonis stand(2.752) and P. bambusoides stand(2.187). Biomass accumulation ratio of each stand was 2.679 to 5.358. Concentrations of N, P and Mg were the highest in leaves, and followed by subterranean parts, and culms+branches in all three species. Concentration of Ca was the highest in leaves, and followed by culms+branches, and subterranean parts in all three species. The difference in biomass among three species stands was caused by their culm size, leaf biomass, net assimilation ratio, and efficiency of leaves to produce culms.
여천공단 주변 해송림의 대기오염에 의한 식물사회학적 변화
박인협,임행진,류석봉 順天大學校 農業科學硏究所 1996 農業科學硏究 Vol.10 No.-
This study was carried out to investigate phytosociological changes of Pinus thunbergii forests induced by air pollution near Yochon industrial complex where air pollution was severe until the early 1980's and lowered to a degree after air pollution was regulated about the middle of the 1980's. Pinus densiflora forests were affected primarily by air pollution, and secondarily by forest structure changed by air pollution. After air pollution was lowered to a degree, low damage forests without invasion and growth of Pueraria thunbergiana and Smilax china have recovered to healthy Pinus densiflora forests but, severe damage forests where Pueraria thunbergiana and Smilax china invaded and grew have declined to scrubby forests. Severe damage forests require silvicultural treatments, especially clearing and killing Pueraria thunbergiana and Smilax china to be healthy forests where tree species compete with each other excluding those vine species.