• 한국산림과학회지
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• 제96권2호
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• pp.189-196
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• 2007

Allometry, basal area equations, and volume equations were developed with various tree measurement variables for the major species, Quercus mongolica and Quercus variabilis, in Korean natural hardwood forests. For allometry models, the relationships between total height-DBH, crown width-DBH, height to the widest portion of the crown-total height, and height to base of crown-total height were investigated. Multiple regression methods were used to relate annual basal area growth to tree variables of initial size (DBH, total height, crown width) and relative size (relative diameter, relative height) as well as competition measures (competition index, crown class, exposed crown area, percent exposed crown area, live crown ratio). For tree volume equations, the combined-variable and Schumacher models were fitted with DBH, total height and crown width for both species.

• 한국농림기상학회지
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• 제21권4호
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• pp.277-285
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• 2019

아고산 지역에서 지형은 바람과 일사, 토양수분함량 등에 영향을 주며 식물의 생장과 발달에 중요한 영향을 미친다. 아고산 지역에서 바람막이 지형이 가문비나무의 수관 생장에 미치는 영향을 알아보기 위해 서식지를 사면과 미지형에 따라 구분하고, 수고와 수관생장을 조사하였다. 아고산 지역의 가문비 나무는 서식지 내 바람의 영향과 미지형에 따라 수고 생장과 수관 생장이 다르게 나타났다. 바람맞이 사면에서 수고 생장과 수관생장률이 낮았고, 바람맞이 사면의 홀로 돋아져 바람과 같은 외부 환경에 노출된 미지형에서 자라는 나무는 바람의지 사면의 주변식생과 함께 자라는 나무보다 수관 생장이 절반 수준으로 낮았다. 바람의 영향이 강한 곳에서는 바람이 불어오는 방향으로 수관 생장이 억제되어 수관이 깃발형으로 발달하였다. 바람맞이 사면에서도 바람에 노출된 미지형 1 유형은 바람막이 역할을 하는 지피물이 존재하는 미지형 3 유형에 비해 수관의 기형이 심하였다. 본 연구는 바람이 심한 아고산 지역의 지형과 생장의 관계를 분석하여 가문비나무의 분포와 생장에서 바람막이 지형의 역할이 중요함을 보여주었다. 아고산 서식지 관리와 복원을 위해서 바람의 영향을 고려한 사면과 지형별 분포에 대한 분석이 필요하다.

• Journal of Forest and Environmental Science
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• 제27권1호
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• pp.47-54
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• 2011

Allometry and basal area equations were developed with various tree measurement variables for the major species; Quercus variabilis, Quercus mongolica, Pinus koraiensis and Larix leptolepis in Korea. For allometry models, the relationships between total height-DBH, crown width-DBH, height to the widest portion of the crown-total height, and height to base of crown-total height were investigated. Multiple regression methods were used to relate annual basal area growth to tree variables of initial size (DBH, total height, and crown width), relative size (relative diameter and relative height) as well as competition measures (competition index, crown class, and live crown ratio).

• 한국약용작물학회지
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• 제17권3호
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• pp.161-164
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• 2009

This study was conducted to investigate the weight of crown part effect on growth and bolting response of Ostericum koreanum Kitagawa. Bolting rate with crown part weight was represented 0%, 0%, 4.1%, 12.9%, 25.1%, 34.9% corresponding to each crown part weight 5 g, 10 g, 20 g, 30 g, 40 g, 50 g. The heavier the crown part weight was the higher the direction rate rose and the flowering time came earlier. The dried root amount was the highest at 30 g and crown part number, the length of root, and crown diameter showed all the highest figures at 30 g. The relation between amount per 10 g and outcrop weight increased on secondary regression formula as weight increased and reached its peak at 29.7 g and then decreased over 29.7 g.

• 한국연초학회지
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• 제13권1호
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• pp.36-42
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• 1991

The present study was conducted to obtain some basic information on the shoot formation from crown gall callus and the characteristics of teratoma shoot derived from crown gall induced by inoculation of Agrobacterium tumefaciens C58. Crown gall callus could be continuously cultured on the phyohormone free basic medium. The growth of crown gall callus was inhibited when BA were added to the cultural media. Shoot formation from crown gall callus fail to be initiated except teratoma shoot which induced on the phytohormone free medium after several subculture on rare occasions. Teratoma shoot could not form root and grow as normal shoot. Addition of BA to cultural media was not effective for shoot elongation, reduction in multiple shoot formation, but IBA was somewhat effective for shoot elongation of teratoma shoot, never for root formation.

• Journal of Forest and Environmental Science
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• 제28권2호
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• pp.63-67
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• 2012

Crown ratio is the ratio of live crown length to tree height. It is often used as an important predictor variable for tree growth equation. It indicates tree vigor and is a useful parameter in forest health assessment. The objective of the study was to develop crown ratio prediction models for Tectona grandis. Based on the data set from the temporary sample plots, several non linear equations including logistics, Chapman Richard and exponential functions were tested. These functions were evaluated in terms of coefficient of determination ($R^2$) and standard error of the estimate (SEE). The significance of the estimated parameters was also verified. Plot of residuals against estimated crown ratios were observed. Although the logistic model had the highest $R^2$ and the least SEE, Chapman-Richard and Exponential functions were observed to be more consistent in their predictive ability; and were therefore recommended for predicting crown ratio in the stand.

• 한국작물학회지
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• 제36권3호
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• pp.254-258
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• 1991

참 당귀를 시비와 무비 재배조건에서 근두경크기에 따른 생육 및 수량을 검토하여 참당귀재배체계확립을 위한 기초자료로 이용하고자 시험한 결과를 요약하면 다음과 같다. 1. 어느 근두경크기구에서나 초장, 두부경 및 경과과 엽의 생중량은 무비구보다 시비구에서 수치가 높았으나 출현율은 차이가 거의 없었다. 2. 초장과 경\ulcorner엽의 생중량은 7.2mm구에서, 두부경은 5.4mm구를 경계로 하여 그보다 작거나 크면 감소하는 경향이었다. 3. 추태율, 개화율 및 절수는 무비구보다 시비구에서 높았고 근두경이 커짐에 따라 증가하였으나 화총수는 7.2mm구를 경계로 하여 그보다 작거나 크면 감소하는 경향을 나타냈다 4. 근장, 지근수 및 생근중도 역시 시비구에서 높았으며 5.4mm구를 경계로 하여 그보다 작거나 커지면 감사하는 경향을 보였다. 5. l0a당 생근중 및 건근중은 시비의 3.1mm구와 무비의 5.4mm구에서 각각 가장 높게 나타났으나 시비의 3.1mm구가 무비의 5.4mm구보다높은 수치를 보였고, 7.2와 9.3mm구에서는 모두 목질화되었다. 6. 시비와 무비 재배조건하에서 근두경의 크기에 따른 유용형질들의 분산분석에서도 높은 유의차를 보였고 이들의 상호작용에도 모든 형질에서 유의성이 인정되었다.

• Journal of Ecology and Environment
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• 제35권3호
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• pp.177-188
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• 2012

We analyzed crown development in Aucuba japonica Thunb. var. japonica resulting from the responses of phytoelements to habitat light conditions over a long period of time. Over the years, the degree of extension unit (EU) dimorphism and the degree of anisophylly were higher under shaded conditions than in brighter conditions. An overall temporally increasing pattern in the degree of EU dimorphism was found while no clear-cut trend was found in the case of anisophylly. EU length and number of leaves per EU co-varied in a spatio-temporal context. The number of terminal buds and their sizes acted as the key initiators of morphological differences of phytoelements which were further amplified following bud break. Leaf area density was displayed mostly in the apex peripheral layer of the crown and the apex layer received most of the incident light. There was a tradeoff between annual leaf production and mean leaf size. Depending on the heterogeneity of irradiance level within a crown, correlative growth inhibition caused higher EU mortality at brighter sites. Due to high mortality, shorter EUs had a mere role in the construction of structural framework of the crown except for the formation of some gaps. There was a strong convergence of EU dimorphism, anisophylly, EU extension growth and variations in leaf size towards formation of functional crown to reduce potential self-shading. Depending on the irradiance level, Aucuba japonica Thunb. var. japonica showed two different modes of crown expansion. At the brighter sites, individual crown expansion was progressive while at the darker sites, individual crown expanded in a diminishing manner and maintained a stable size. A plant's "growth diminishing phase" appeared earlier at shaded sites than brighter sites.

• 원예과학기술지
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• 제32권1호
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• pp.41-45
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• 2014

본 실험은 고랭지에서 신품종 사계성 딸기 '고하' 품종의 생육 및 수량에 영향을 미치는 관부수를 구명하고자 실시하였다. 정식은 4월 29일에 재식거리를 $55{\times}30cm$로 실시하였으며, 시험구 처리는 관부수를 1, 3, 5개로 하고 대조구로 방임을 두었다. 생육초기에 관부수가 적을수록 잎은 커졌고, 화방경은 굵어졌다. 최종수확 시 초장은 크라운수가 많을수록 길어졌다. 생체중은 관부수 방임구가 118g으로 관부수 1개구의 40.8g보다 77.2g이 더 무거웠다. 발생된 화방수는 관부수 5개구와 방임구가 20.1개로 관부수 1개구의 6.8개에 비해 13.3개가 더 많았다. 그러나 관부수에 따른 과실품질의 유의적인 차이는 보이지 않았다. 관부수가 많을수록 평균과중은 가벼웠으며, 상품과율은 감소하였다. 상품수량은 관부수 방임구가 $17,372kg{\cdot}ha^{-1}$로 가장 많았으며, 관부수 1개구에 비해 68% 증수되었다. 따라서 고랭지 사계성 딸기 '고하'의 여름재배 시 안정생산을 위해서는 관부는 방임하며, 화방굵기가 3mm 이하인 화방은 제거하는 것이 가장 적당하였다.

• 한국자원식물학회지
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• 제11권2호
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• pp.176-176
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• 1998

This study was carried out to obtain the information for growth characteristics of crown gall tumor and hairy root transformed by Agrobacterium spp,. on the media with phytohormones, casein hydrolysate and activated charoal. Crown gall tumors and hairly roots were formed respectively on potato tuber discs infected by tumerfaciens A ch 5 and A.rhizogenes ATCC15834. These tumors and roots could be grown on the phytohormone free media. PCR analysis of Rol C and Vir C gene fragments confirmed that crown gall root was prompted on the medium containing 2,4-D 2mg/l with casein hydrolysate lg/l. The survival ration of crown gall tumor callus derived from potato increased on medium containing the activated charcoal 0.5∼0.2mg/l because of the prevention, on the other hand, hairly roots were necrosis on the same medium. Callus derived from hairly root were excellently grown for a short time by suspension culture on liquid medium containing 2.4-d 2mg/L and casein hydrolysate lg/l.