• 한국작물학회지
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• 제43권3호
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• pp.161-167
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• 1998

Root and shoot development of two rice (Oryza sativa L.) cultivars with different genetic backgrounds was studied with reference to their relative growth. Tongil type (indica-japonica hybrid) cultivar 'Kuemkangbyeo' and japonica cultivar 'Koshihikari' were grown in $5000^{-1}$ a Wagnar pots under flooded condition. Three plants with roots of both cultivars were taken in every phyllochron through the heading stage to record morphological characteristics of shoot and root system. Compared to Koshihikari, Kuemkangbyeo produced more tillers and had greater shoot weight and leaf area per hill. Length and weight of the root system in both cultivars increased exponentially with time. At the same time, root system development was significantly faster in Kuemkangbyeo than in Koshihikari after the panicle initiation stage. As a result, Kuemkangbyeo has a vigorous root system which consists of larger number of nodal roots compared to Koshihikari. Also, the root length and weight per unit leaf area of Kuemkangbyeo were larger than those of Koshihikari in the later half of growing period, which suggests possible higher physiological activity of the root system of Kuemkangbyeo which is known as a high-yielding cultivar. The relationship between root traits (crown root number, total root length, and root dry weight) and shoot traits (leaf area and leaf+culm dry weight) in both cultivars closely showed allometry until the flag leaf stage.

• 한국수산과학회지
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• 제44권6호
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• pp.689-694
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• 2011

Age and growth of whitespotted conger Conger myriaster were estimated using right sagittal otoliths from 495 fish collected from February, 2004, to January, 2005, in the southern coastal waters of Korea. Examination of the outer margin of the otoliths showed that opaque zones formed once a year and annual rings formed from April to June. The ages of the specimens examined ranged from 3 to 8 years. Whitespotted conger spawn from December to March. Allometry between preanal length and total weight can be expressed as $TW=0.0350{\times}PL^{2.9173}$ ($R^2=0.89$). There was no significant difference in allometry between females and males (P>0.05). The estimated VBF growth equation was $L_t=415.2(1-e^{-0.1457(t+0.4654)})$.

• 해양환경안전학회지
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• 제25권2호
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• pp.244-250
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• 2019

엽상형 해조류의 간접적인 건중량 추정을 위해 구멍갈파래(Ulva australis), 잎파래(Ulva linza), 개도박(Pachymeniopsis lanceolata), 방사무늬김(Pyropia yezoensis)의 형태적 특성과 생체량의 관계를 분석하였다. 시료는 2017년 2월부터 2018년 12월 까지 남해안 6곳에서 채집되었으며, 총 319개체가 분석에 사용되었다. 엽상형 해조류 네 종의 길이와 생체량에 대한 상대성장 지수는 0.28로 일반적인 1/4 (0.25) 지수법칙에 해당하였다. 네 종의 엽체의 표면적과 습중량은 각각 건중량과 유의한 선형관계를 보였으며, 건중량의 94 ~ 99%를 설명할 수 있었다. 이 결과는 엽상형 해조류의 표면적 또는 습중량을 통해 개체의 건중량을 매우 정확하게 추정할 수 있다는 것을 의미한다. 이 방법론은 실험실 연구에서 건중량을 직접 측정할 수 없을 때 쉽고 빠르게 활용할 수 있으며, 추가적으로 소요되는 시간과 비용을 절약할 수 있을 것이다.

• Animal Bioscience
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• 제37권5호
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• pp.817-825
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• 2024

Objective: The aim of this study was to identify suitable polynomial regression for modeling the average growth trajectory and to estimate the relative development of the rib eye area, scrotal circumference, and morphometric measurements of Guzerat young bulls. Methods: A total of 45 recently weaned males, aged 325.8±28.0 days and weighing 219.9±38.05 kg, were evaluated. The animals were kept on Brachiaria brizantha pastures, received multiple supplementations, and were managed under uniform conditions for 294 days, with evaluations conducted every 56 days. The average growth trajectory was adjusted using ordinary polynomials, Legendre polynomials, and quadratic B-splines. The coefficient of determination, mean absolute deviation, mean square error, the value of the restricted likelihood function, Akaike information criteria, and consistent Akaike information criteria were applied to assess the quality of the fits. For the study of allometric growth, the power model was applied. Results: Ordinary polynomial and Legendre polynomial models of the fifth order provided the best fits. B-splines yielded the best fits in comparing models with the same number of parameters. Based on the restricted likelihood function, Akaike's information criterion, and consistent Akaike's information criterion, the B-splines model with six intervals described the growth trajectory of evaluated animals more smoothly and consistently. In the study of allometric growth, the evaluated traits exhibited negative heterogeneity (b<1) relative to the animals' weight (p<0.01), indicating the precocity of Guzerat cattle for weight gain on pasture. Conclusion: Complementary studies of growth trajectory and allometry can help identify when an animal's weight changes and thus assist in decision-making regarding management practices, nutritional requirements, and genetic selection strategies to optimize growth and animal performance.

• 한국동물학회지
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• 제14권3호
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• pp.139-158
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• 1971

장수허리노린재(Anoplocnemis dallasi Kiritschenko)의 第1齡 幼蟲(50個體)부터 成蟲까지(各 70個體씩)에서 얻은 實測値를 定式化하여 成長 및 相對成長을 分析 觀察한 結果 다음과 같은 結論을 얻었다. $\circled1$ 成長量 : 口吻이 가장 緩慢한 直線狀 增加를 하고 그 外는 모두 急激한 抛物線狀 增加를 나타내며 體長, 後脚, 中脚, 前脚, 觸角, 前胸背板의 幅, 口吻의 順으로 體長이 가장 急激하게 增加한다. $\circled2$ 成長比 : 口吻의 增加率 3.054倍가 가장 적으며 直線狀 增加를 나타내고 그 外는 모두 抛物線狀 增加를 보이며 前胸背板의 幅의 增加率 8.186倍가 가장 크다. $\circled3$ 各 齡別成長比 : 가장 큰 成長比는 若齡 幼蟲쪽에 있으며 가장 적은 成長比는 老齡 幼蟲쪽에 있다. $\circled4$ 成長率 : 觸角의 그것이 減少되었으며 그 外는 모두 增加되었다. $\circled5$ 比成長率 : 觸角이 가장 急하게 減少되었으며 前脚, 口吻, 後脚, 中脚의 順으로 緩慢해졌고 前胸背板의 幅과 體長은 上昇되다가 減少되었다. $\circled6$ 相對成長係數($\alpha$)는 위의 모든 部位에 對해서 前胸背板의 幅의 그것이 항상 가장 强한 優成長이었고 口吻은 가장 弱한 劣成長이었다. $\circled7$ 對 體長, 對前胸背板의 幅, 對觸角, 對口吻, 對前脚, 對中脚, 對後脚 相對成長에서 各 部分의 相對成長係數($\alpha$)는 同一한 樣式(順序)을 나타낸다. $\circled8$ 相對成長係數 $\alpha$가 增加하면 相對成長 初量 b가 減少하는 傾向을 나타내며 그 逆도 成立한다. $\circled9$ 劣成長일 境遇는 成長中心이 若齡基에 있고 優成長일 境遇는 老齡基에 있다.

• Journal of Plant Biology
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• 제13권1호
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• pp.47-55
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• 1970

In order to approach a reasonable method for the indirect estimation of the productivity in terrestrial plants, allometric method was studied with herbs, such as Boenmeria frutescens and Hibiscus mutabilis, and scrubs, such as Robinia pseud oacacia and Morus alba f. Hchiroe. Allometric relations between D230H, square of the stem(or shoot) diameter(D30) on 30cm height above ground multiplied by stem length(H), and the amount of the stem(Ws), orof the leaves per stem, were fitted to each material plant with linear regression. The allometric coefficient in relation of D230H to Ws was approximated between scrubs having different life form, and the allometric function in relation of DF2 to WL was common between herbs in spite of having different growth habitat. As the allometries between D230H and Ws or WL were changeable with the seasonal change it funciton should be calculated repeatedly whenever investigating the standing crop of such community. It is able to utilize an indirect value of D30 obtained from the allometry between D30 and H because direct measurement of D30 in the field is accompanied by troublesome and waste of much time.

• Journal of Ecology and Environment
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• 제29권5호
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• pp.485-488
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• 2006

Allometric equations for biomass measurement of the shrub species, Lindera obtusiloba, were developed. The allometric equations between $(BD)^2H$ and dry weight of leaves ($W_I$), stems and branches ($W_{sb}$), roots ($W_r$) and total weight ($W_t$) of the Lindera obtusiloba were as follows: $W_I=0.7318\;(BD^2H)^{0.6108},\;W_{sb}=0.6067(BD^2H)^{0.8355},\;W_r=0.4524(BD^2H)^{0.7608},\;W_t=1.672 (BD^2H)^{0.7664}$. The $R^2s$ between $(BD)^2H\;and\;W_I,\;W_{sb},\;W_r\;and\;W_t$ of the Lindera obtusiloba were 0.9251, 0.9571, 0.9353 and 0.9546, respectively. Root weight of this Lindera obtusiloba was about 38% of the aboveground biomass.

• 임산에너지
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• 제17권1호
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• pp.8-22
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• 1998

남한강 유역의 소나무, 리기다소나무, 상수리나무, 굴참나무 및 신갈나무 군락을 대상으로 상대생장법에 의하여 현존량을 추정하였으며, 각 군락에 있어서 D2H와 줄기(Ws), 가지(Wb) 및 잎(Wl)의 상대생장식은 다음과 같다. 소나무 군락 : logWs=0.58482D2H-0.42417 logWb=0.6234D2H-1.2321 logWl=0.2247D2H-0.09359 리기다소나무 군락 : logWs=0.9218D2H-1.4692 logWb=1.0064D2H-2.2278 logWl=0.6275D2H-1.1715 상수리나무 군락 : logWs=0.96659D2H-1.56975 logWb=0.86315D2H-2.17944 logWl=0.79876D2H-1.97137 굴참나무 군락 : logWs=0.4753D2H＋0.20026 logWb=0.5725D2H-0.92006 logW1=0.61649D2H-1.4288 신갈나무 군락 : logWs=0.5526D2H-0.1228 logWb=0.5188D2H-0.9787 logWl=0.7754D2H-2.6273 상대생장식으로 추정한 현존량은 리기다소나무림 약 61만ton, 소나무림 약 120만ton, 상수리나무림 약 289ton, 굴참나무림 약 2,800ton 그리고 신갈나무림 약 57만ton으로서 소나무 군락이 전 지역의 약 43.9%를 점유하고 있다. 녹지자연도 등급별 현존량은 수령 20년 이상인 8등급에 속하는 삼림군락의 현존량 약 7만4천ton, 7등급에 속하는 삼림 약 200만ton으로서 7등급 군락이 전체의 75%를 차지하였으며, 식재림인 리기다소나무림은 약 61만 ton으로 측정되었다. 따라서 남한강 유역의 대표적인 자연림은 7등급에 속하는 소나무림과 신갈나무 군락이었다.

• 생태와환경
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• 제43권2호
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• pp.298-306
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• 2010

한강하구 장항습지의 선버들군락의 현존량과 1차생산성을 상대생장법(allometry)과 기저 단면의 나이테를 이용하여 추정하였으며, 버드나무림 하부에 서식하는 말똥게 개체군의 2차생산성을 추정하였고 두 개체군 간의 관계성을 해석하였다. 선버들군락의 지상부 1차생산성은 4,777 g DW $m^{-2}yr^{-1}$으로서 국내에서 최고의 생산성을 나타내었다. 장항습지에서 선버들에 의해 저토로 공급되는 내생유기물량은 359 g C $m^{-2}yr^{-1}$이며 외생유기물량은 347 g C $m^{-2}yr^{-1}$로 나타났다. 말똥게의 2차생산성은 100.2 g FW $m^{-2}yr^{-1}$로 선버들 군락의 지상부 1차생산성의 2.1%로 나타났다. 선버들군락 내 말똥게의 생물량은 140 g FW $m^{-2}$이며 이들의 연간 먹이소비량은 약 2,140 g FW $yr^{-1}$이고, 말똥게의 연간 섭식량은 약 208 g C $m^{-2}yr^{-1}$로 추정하였다. 본 연구로부터 장항습지의 주요 생물구성원인 선버들군락과 말똥게의 높은 생산성을 확인하였다.

• ALGAE
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• 제23권4호
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• pp.289-294
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• 2008

To estimate seaweed biomass or standing crop, a nondestructive sampling can be beneficial because of not much destroying living plants and saving time in field works. We suggest a methodological procedure to estimate seaweed biomass per unit area in marine benthic habitats by using species-specific regression equations. Percent cover data are required from the field samplings for most species to convert them to weight data. However, for tall macroalgae such as kelps we need density data and their size (e.g., size class for subtidal kelps) of individuals. We propose that the field sampling should be done with 5 replicates of 50 cm x 50 cm quadrat at three zones of intertidals (upper, middle, lower) and three depth points (1, 5, 10 m) in subtidals. To obtain a reliable regression equation for a species, a substantial number of replicate is necessary from destructive samplings. The regression equation of a species can be further specified by different locality and different season, especially for the species with variable morphology temporally and spatially. Example estimation carried out in Onpyung, Jeju Island, Korea is provided to compare estimated values with real weight data.