• Journal of Ecology and Environment
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• 제29권2호
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• pp.151-155
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• 2006

Root nodule biomass, and seedling biomass and growth were examined for 2-year-old Robinia pseudoacacia and Amorpha fruticosa seedlings following fertilization treatments. Organic fertilizer, solid combination fertilizer, and organic fertilizer plus solid combination fertilizer were used for the study. Root nodule biomass (g/plant) ranged from 3.00 to 7.06 for R. pseudoacacia and varied from 1.52 to 2.32 for A. fruticosa, respectively. In all treatments, root nodule biomass of R. pseudoacacia was significantly higher than those of A. fruticosa. Fertilization significantly increased root nodule biomass for only R. pseudoacacia, however, there were no significant differences in root nodule biomass among fertilization treatments. Root nodule biomass was not influenced by soil nitrogen (N) and phosphorous (P) concentrations following fertilization treatments. Seedling biomass (components and total) and growth (diameter at root collar and height) were strongly correlated with root nodule biomass for the two N fixing tree species.

• 한국작물학회지
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• 제52권3호
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• pp.249-258
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• 2007

Experiments were conducted with aims to (1) estimate the biomass yield potential, (2) characterize the biomass and digestible dry matter production, and (3) reveal the characteristic seedling establishment of a whole crop rice variety, Nogyangbyeo, in dry- and wet-seeded rice. Maximum aboveground total biomass of Nogyangbyeo was 18 t $ha^{-1}$ in dry-seeded rice and 20 t $ha^{-1}$ in wet-seeded rice. Biomass yield potential of Nogyangbyeo was lower than that of Dasanbyeo. Comparatively, Nogyangbyeo was straw-dependent and Dasanbyeo was grain-dependent for biomass accumulation. Percentage of digestible dry matter (DDM) was higher in panicles than straw. Digestible dry matter yield was determined mainly by biomass yield rather than DDM percentage. Number of seedling establishment in Nogyangbyeo was $73m^{-2}$ in dry-seeded rice and $109m^{-2}$ in wet-seeded rice. Poor seedling establishment of dry-seeded Nogyangbyeo in the field condition was the result of low seed germination under low temperature and poor seedling emergence by deep sowing. Low seedling emergence rate of Nogyangbyeo was attributed mainly to slow elongation growth by slow leaf development and partly to mesocotyl and 1st internode lengths, not to genetically defined leaf length. The slow elongation growth of Nogyangbyeo was the same even in the high daily mean temperature of $24^{\circ}C$. Results suggest DDM yield in rice can be improved simply by increasing biomass and whole crop rice varieties should be adaptable to direct-seeding.

• Advances in environmental research
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• 제3권1호
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• pp.1-9
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• 2014

Effect of automobile polluted soil with five soil concentration (0 (Control), 25, 50, 75 and 100%) was observed on early seedling growth performance and biomass production of Neem (Azadirachta indica A. Juss). The treatment of 75% automobile polluted soil significantly (p < 0.05) decreased the seedling length (18.60 cm) of A. indica. The automobile polluted soil treatment with the concentration of 50% slightly increased the root length as compared to control. The automobile polluted soil treatment with the concentration of 25, 50, 75 and 100% negatively affected shoot length of A. indica as compared to control. The treatment of all concentration of automobile polluted soil progressively decreased the total leaf area A. indica as compared to control soil treatment. The automobile polluted soils also showed negative effects on biomass production of A. indica. The automobile polluted soil treatment at 25% concentration significantly (p < 0.05) affected shoot, leaves and seedling dry weight of A. indica as compared to control soil treatment. The order of relationship between production of A. indica's seedling dry weight and automobile polluted soil treatment was observed as root > shoot > leaves > total seedling.

• Journal of Forest and Environmental Science
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• 제35권1호
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• pp.25-30
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• 2019

The composition of artificial soil in a containerized seedling production plays an important role in seedling quality as well as environmental issues. We investigated the effects of different types of biomaterials and mixed ratio with artificial soil on the growth of Fraxinus rhynchophylla seedlings. Soil medium was supplemented with 3 levels (0%, 10%, 20%) of pine bark, mushroom sawdust and rice husk. Root collar diameter (RCD), height growth, and biomass have significantly increased when rice husk was applied. Compared with the control, RCD and height growth showed highest in 20% rice husk treatment with an increase of 5.7% and 17.6%, respectively. In contrast, the treatments of pine bark and mushroom sawdust showed lower results in growth parameters (RCD, height growth, and total biomass) than control. Seedling quality index was also highest at the 20% rice husk treatment, but there was not statistically different among treatments. Our results suggested rice husk can be substituted up to 20% of substrates for containerized F. rhynchophylla seedling production system.

• 한국산림과학회지
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• 제89권5호
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• pp.591-597
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• 2000

본 실험은 층층나무(Cornus controversa Hemsl)와 말채나무(Cornus walteri Wanger)의 양묘시 적정 차광율을 구명하고자 상대광도가 100%(대조구), 50%, 30%, 10% 및 2%로 조절된 피음포지에서 실시하였다. 두 수종의 수고생장은 상대광도 50%에서 가장 높은 생장을 보였고, 근원경생장은 대조구와 50%구에서 서로 비슷하게 높은 생장을 기록하였다. 물질생산량을 보면 층층나무의 전체 생산량의 경우 50%에서 자연전광의 대조구보다 높은 생산량을 보였으나 지하부의 생산량은 다소 낮았다. 말채나무는 50%에서 전체 생산량은 대조구보다 낮았으나 지상부 생산량은 다소 높은 생산량을 보였다. 30%이하의 상대광도에서는 수고생장, 근원경생장 및 물질생산량이 급격히 감소하였다. 두 수종 모두 30%에서 가장 높은 T/R율을 기록하였으며 전체적으로 말채나무의 T/R율이 층층나무의 T/R율 보다 높았다. 잎의 엽록소 a와 b 및 전체엽록소 함량은 상대광도가 낮을수록 높아지는 경향을 나타내었다.

• 임산에너지
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• 제19권1호
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• pp.7-12
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• 2000

본 실험은 광도가 곰솔(Pinus thunbergii Parl.) 유묘의 생장과 물질생산에 어떠한 영향을 미치는 가를 알고자 자연전광이 100, 50, 30, 10% 및 2%로 조절된 야외포지에서 1997년 5월부터 1998년 10월까지 실시되었다. 곰솔의 수고생장 및 근원경생장은 1,2차년을 통하여 자연전광에서 가장 높악으며, 50%에서의 수고생장은 1,2차년도 각각 대조구의 96.4, 88.9%로, 근원경생장은 각각 94.1 77.6%로 조상되엇다, 30%이하로 상대광도가 낮아질수록 수고 및 근원경생장이 급격히 감소 되었으며, 근원경생장의 감소율이 수고생장의 감소율보다 높게 나타났다. 2차년도의 2%에서는 시험 유묘 모두가 고사하였다. 물질생산량도 광도가 낮아짐에 따라 감소되었으며, 1, 2차년도 모두 뿌리의 감소율이 잎, 줄기보다 높았고, 1차년도에는 줄기의 감소율이, 2차년도에는 잎이 감소율이 가장 낮았다. T/R율은 1차년도에는 50%에서,3.55, 2차년도에는 10%에서 4.88로 가장 높았다.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2005년도 추계 학술발표논문집
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• pp.240-246
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• 2005

• 한국기후변화학회지
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• 제7권1호
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• pp.9-17
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• 2016

Climate change affects plant responses on physiological characteristics and growth, and Pinus densiflora, one of the major tree species in Korea, are expected to be particularly vulnerable to rising temperature and increased precipitation. This study was conducted to investigate the effects of an open-field warming and precipitation manipulation on physiological characteristics and growth of P. densiflora seedlings. Seedlings of 2-year-old P. densiflora were planted in April, 2013, in open-field nursery located at Korea University. The air temperature of warmed plots had been set to be $3^{\circ}C$ higher than the control plots using infrared lamps. Precipitation was manipulated to be 30% lower or higher than the control, using transparent panels and drip irrigation. Net photosynthetic rate, total chlorophyll content, seedling height, root collar diameter and biomass were measured from April, 2014 to April, 2015. The increase in new shoot biomass from warming was statistically significant, with the biomass in warmed plots about 2-fold higher than in the control plots in 2014 and 2015. This result might be related to advanced bud burst and increased occurrence of abnormal new shoots in warmed plots. Meanwhile, the results of net photosynthetic rate, total chlorophyll content, seedling height, root collar diameter and total biomass from warming and precipitation manipulation were not statistically significant, but tendencies of lower net photosynthetic rate and higher seedling height and biomass in warmed plots compared to the control were shown. Such might be speculated as results of the extended growth period. When root to shoot (R/S) ratio was calculated from the biomass data obtained in April 2014 and April 2015, increased R/S ratio was observed regardless of the treatments applied. Drought tolerance of P. densiflora and particularly low annual precipitation observed in 2014 were suggested as the possible reasons.

• 한국산림과학회지
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• 제103권4호
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• pp.556-563
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• 2014

본 연구는 시설양묘과정에서 편백 용기묘(2-0묘) 생산을 위해 요구되는 적정 용기의 구 용적 및 생육밀도를 구명하고자 수행하였다. 용기 20구(400 mL/구, 150본/$m^2$), 24구(320 mL/구, 200본/$m^2$), 35구(240 mL/구, 260본/$m^2$)에서 편백의 근원경, 간장, 생체량, 뿌리밀도 및 묘목품질지수를 조사 분석하였다. 용기에 따른 근원경, 간장, 생체량, 뿌리밀도 및 묘목품질지수는 20구 용기에서 유의적으로 가장 높은 값을 보였지만, H/D율과 T/R률은 용기에 따른 차이가 없었다. 단위 면적 당 총 물질생산량은 35구에서 가장 낮았으며, 20구와 24구 용기에서는 유의적 차이가 없었다. 또한, H/D율과 T/R률을 제외한 근원경, 간장, 물질생산량, 뿌리밀도 및 묘목품질지수는 용기 구 용적과는 정의상관관계, 생육밀도와는 부의 상관관계를 보였다. 본 결과를 바탕으로 시설양묘 단계에서 편백 2-0묘는 20구(400 mL/구, 150본/$m^2$) 용기가 적정 규격으로 판단된다. 편백 2-0묘 생산을 위한 적정 용기의 선정으로 우량 묘목 생산 및 경제적 비용 절감 효과와 함께 우수한 조림 성과를 거둘 수 있을 것으로 기대된다.

• The Korean Journal of Ecology
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• 제19권2호
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• pp.125-139
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• 1996

The relationships between environmental factors and the establishment and growth of oak seelings were studied in the greenhouse. The early seedling performances of three oak species (Quercus mongolica, Quercus serrata, Quercus variabilis) were compared. Mean seed weight was the biggest in Q. variabilis, and the smallest in Q. serrata, and the germination rate was higher in Q. variabilis than in Q. mongolica and Q. serrata. The germination rate was significantly affected by seed weight class in Q. serrata, but not in Q. mongolica. Emergence of oak seedlings was similar in all three oak species, and especially the first leaf emergence increased about twenty days after germination. An experiment was designed using three environmental factors (light, soil moisture, fertilizer) to compare the response of the three oak species. Light and soil moisture significantly affected the seedling height growth of Q. variabilis, but the effect was marginal in Q. mongolica and Q. serrata. However, growth of seedling biomass was significant in all three oak species. In contrast, fertilizer did not affect seedling growth of any of the oak species. Q. variabilis is expected to grow well in large gaps because it is very sensitive and responds well to high light and high moisture conditions. Q. mongolica and Q. serrata are relatively tolerant to shade but may need gaps for the seelings to grow into saplings.