• 제목/요약/키워드: height growth

검색결과 214건 처리시간 0.067초

Populus nigra×P. maximowiczii F1의 삽수직경(揷穗直徑)이 활착(活着)과 수고생장(樹高生長)에 미치는 영향(影響) (Influence of Cutting Diameter on Survival and Height Growth in Populus nigra×P. maximowiczii F1 Clones)

  • 노의래;안진권;김영모;이상붕
    • 한국산림과학회지
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    • 제59권1호
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    • pp.57-62
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    • 1983
  • Populus nigra${\times}$P. maximowiczii의 적정삽수(適正揷穗) 굵기를 구명(究明)하기 위하여 삽수직경별(揷穗直徑別) Clone별(別) 활착률(活着率)과 수고생장(樹高生長)을 연구(硏究)한 결과(結果)는 다음과 같다. 활착률(活着率) 80% 이상(以上)을 기준(基準)할 때 삽수(揷穗)굵기는 최소(最小) 8mm 이상(以上)이어야 하며 수고생장(樹高生長)과의 관계(關係)는 삽목(揷木) 후(後) 2개월(個月)까지는 삽수직경(揷穗直徑)이 클수록 수고(樹高)도 커지나 이러한 효과(効果)는 2개월(個月) 이후(以後) 즉(即) 7월(月)부터 점차 감소(減少)되는 경향(傾向)을 보였다. 삽수(揷樹)의 굵기가 13mm 이상(以上)되면 그 이하(以下)의 삽수(揷穗)보다도 현격(懸隔)히 활착률(活着率)(92.7%)이 높아지며 수고생장(樹高生長)도 좋아지는 경향(傾向)을 보였다. 일일수고생장(日日樹高生長)은 8월중(月中)에 최고점(最高點)에 달(達)했으며 이후(以後) 점차 감소(減少)하면서 10월(月) 상순(上旬)에는 거의 정지(停止)되는 것으로 추정(推定)된다.

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Geographic Variation in Survival Rate and Height Growth of Pinus densiflora S. et Z. in Korea

  • Kim, In-Sik;Ryu, Keun-Ok;Song, Jeong-Ho;Kim, Tae-Su
    • 한국산림과학회지
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    • 제94권2호통권159호
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    • pp.73-81
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    • 2005
  • This study was conducted to examine the geographic variation among provenances of Pinus densiflora in survival rate and height growth at four test plantations (Jungsun, Chungju, Naju, and Jeju). The plantations were parts of the eleven provenance trials of Pinus densiflora established by Korea Forest Research Institute in 1996. The survival rate and height growth were significantly different among test plantations at $p{\leq}0.01$. Latitude and longitude of test plantation were negatively correlated with survival rate and height growth. On the other hand, annual mean temperature, mean temperature (Nov.~Feb.), extremely low temperature (Dec.~Feb.), and annual mean growing days of test plantation were positively correlated with these two. The relationships between growth variables and geographic variables were analysed with canonical correlation analysis. A considerable amount of variation in survival rate and height growth was explained by latitude, annual mean growing days, extremely low temperature (Dec.~Feb.) and extremely high temperature (Nov.~Feb.) of provenances. It is estimated that up to 47.1% and 67.4% of the genetic variability in survival rate and height growth was attributable to the environmental variability of the provenances, respectively. The response surface curve of survival rate and height growth was plotted against latitude and longitude to examine growth performance of provenances for each test site. Generally, the local provenances showed better survival rate and height growth.

Comparative Height Growth and Forest Structure of Fraxinus Spaethiana and Pterocarya Rhoifolia in Natural Reforestation Stands in Steep Valleys of Central Japan

  • Ann, Seoung-Won
    • 한국환경과학회지
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    • 제15권12호
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    • pp.1119-1124
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    • 2006
  • Height-growth analysis was used to examine forest structure and compare Pterocarya rhoifolia and Fraxinus spaethiana growth characteristics within and between each species in two P. rhoifolia-dominant and two F. spaethiana established contemporaneously in the sere, species vertical stratification 25 years after stand initiation was such that P. rhoifolia dominated the overstory but F. spaethiana the understory, including that P. rhoifolia grew about 4 times more rapidly Similarly, F. spaethiana dominated the overstory but not the understory, in a stand where it established mainly by itself, 25 years after Initiation. However, comparing the two different stands, P. rhoifolia overstory heights were about two times greater than F. spaethiana. This suggests that in a disturbance regime, forest regeneration is affected by height-growth patterns such that P. rhoifolia's ability to achieverapid height growth allows it to dominate where lights growth allows it to dominate where light resources are continuously abundant.

뉴로피드백 훈련이 후천적 요인의 자기조절력과 키 성장에 미치는 영향 (The Effects of Neuro-feedback Training on Self-regulation of Acquired Factors and Height Growth)

  • 곡명양;이지안
    • 융합정보논문지
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    • 제8권6호
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    • pp.15-20
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    • 2018
  • 본 연구는 뉴로피드백 훈련을 적용하여 생활습관을 조절하는 자기조절력과 키 성장간의 상관성을 규명함으로 써 키 성장의 효과적인 중재 방안에 대한 해법을 제시하고자 실시하였다. 이를 위해 키 성장 프로그램을 실시하고 있는 초등학교 2학년~4학년 학생 40명(실험군 20명, 대조군 20명) 대상으로 뉴로피드백 훈련 전 후의 변화를 확인하였다. 실험기간은 3개월간(주 2회), 훈련시간은 1회 30분이였다. 뉴로피드백 훈련을 적용한 실험군과 대조군의 자기조절력 차이를 분석한 후, 키 성장 차이를 비교 분석하였다. 첫째, 뉴로피드백 훈련을 적용한 실험군이 대조군에 비해 자기조절력에 유의미한 변화가 있었다. 둘째, 뉴로피드백 훈련을 적용한 실험군이 대조군에 비해 더 크게 키 성장의 변화가 있었다. 이상의 결과를 종합하면 뉴로피드백 훈련이 성장기 학생들에게 있어 키 성장의 후천적 요인들 중 생활습관을 조절하는 자기조절력에 긍정적인 영향을 미치며, 그로 인해 키 성장에도 긍정적인 영향을 미친다는 것이 확인되었다.

중부한국의 자연생 소나무의 연 신장성장율에 영향을 미치는 토양요인들에 대한 다요인 분석 (An Analysis of the Relationship of Soil Factors to the Height Growth of Pinus densiflora within the Young Natural Stands in Central Korea)

  • 오계칠
    • Journal of Plant Biology
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    • 제15권4호
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    • pp.1-12
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    • 1972
  • To study on the annual height growth of Pinus densiflora within natural pine stands in central Korea, twenty two pure closed Pinus densiflora stands were selected subjectively in the west-central region of Korea. In each stand twenty trees were chosen randomly. For each tree, abotu ten to fifteen measurements of internodal lengths were made from leader top to trunk base. A total of one hundred thirty four soil samples was collected. Each soil sample was bulked with three subsamples. The ranges of the growth measurements per stand, per tree and per observation were 14.9-35.4cm, 9.0cm-54.4cm and 2.4cm-69.0cm respectively. The total mean value was 23.5cm. The Student-Newman-Keul's tests for the multiple comparison among the mean values of the height growth per stand were very highly significant. The resutls of the analysis of variance of the height growth data for the selected fifteen stands among the twenty two stands indicate that sampling efficiency might be increased to 744% if measurement of the growth were made on fifteen trees per stand from twenty stands instead of twenty trees per stand from fifteen stands. The annual height growths of Pinus densiflora and Pinus koraiensis for the period from 1960 to 1968 were 21.74$\pm$5.29cm (10) and 20.56$\pm$5.59cm (10) respectively. The total means of easily-soluble phosphorus, total nitrogen, loss on ignition and pH for the soil samples were 2.8 ppm, 0.09%, 5.4% and 4.7 respectively. The ranges of those amounts were 18.7-1.7ppm, 0.17-0.05%, 11.6%-3.1%, 3.9-5.1 respectively. The relationship of the annual height growth of P. densiflora to soil was studied in terms of standard partial multiple regression. Among soil properties such as non-capillary pore space, capillary pore space, maximum field capacity, loss on ignition, soil reaction, total nitrogen and easily-soluble phosphoros investigated, the easily soluble phosphorus in one analysis and loss on ignition and soil reaction in the other analysis seem to have significant positive influence on the annual height growth.

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곰솔임분(林分)의 직경(直徑) 및 수고생장(樹高生長) 추정(推定)에 관한 연구(硏究) (Estimation of Diameter and Height Growth in Pinus thunbergii Stands Using Linear and Nonlinear Growth Functions)

  • 박명숙;정영관
    • 한국산림과학회지
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    • 제88권1호
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    • pp.47-54
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    • 1999
  • 지위지수(地位指數) 12등급인 곰솔임분에 대한 최적(最適)의 직경(直徑) 및 수고생장함수(樹高生長函數)를 linear transformation(1), linear transformation(2) 등 2개의 선형식(線型式)과 exponential, Gompertz, Chapman-Richards, Weibull 등 4개의 비선형식(非線型式)에 의하여 도출하였다. 이들 함수에 의하여 추정된 직경 및 수고생장과 실측치인 직경 및 수고생장간의 상호관계를 분석하였다. 곰솔임분의 임령에 따른 직경과 수고생장을 추정한 결과는 선형식보다 비선형식의 적합성이 높게 나타났으며, 직경생장에는 Gompertz식, 그리고 수고생장에는 Chapman-Richards식의 적합성이 높게 나타났으나, 이들 비선형식간의 큰 차이는 없는 것으로 나타났다. 따라서 앞으로 이들 비선형식을 적용하여 현실임분(現實林分)의 직경과 수고생장을 추정하여야 할 것으로 사료된다.

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성장판 자극기기가 인체의 키 변화에 미치는 영향 (Effects of Growth Plate Stimulation Machine on Height Change in Human Body)

  • 조춘남;명재신
    • 한국전기전자재료학회논문지
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    • 제34권5호
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    • pp.357-363
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    • 2021
  • Recently, as interest in appearance has increased, various studies on treatment method for short stature are being conducted. In this study, the effect of growth plate stimulation on the height growth of children and adolescents was studied. As a result of pre- and post-analysis of the experimental group, it was confirmed that the difference in average height according to growth plate stimulation was relatively large. In addition, in the results of analyzing the effects of demographic factors on the height growth of the experimental group and the control group, weight showed the greatest influence on height growth among the demographic factors affecting the height growth of the experimental group. The effect on the height growth of the control group was found to have an effect in the order of age, weight, and father's height. The difference in height changed post-mortem between the experimental group and the control group was 1.10 cm for 3 months, and the difference was the result of growth plate stimulation. It was confirmed that growth plate stimulation had a significant effect on the height change of children and adolescents, except for weight, which is a common factor of height change in the experimental and control groups. Therefore, it is expected that it can be used as a treatment method for short stature.

PHV 연령별 신장 발육의 특징에 관한 연구 -7~18세의 종단적 자료를 이용하여- (Study on the Characteristics of Height Growth by PHV Age -Using longitudinal data of age 7 to 18-)

  • 박주미;김명
    • 보건교육건강증진학회지
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    • 제8권2호
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    • pp.74-86
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    • 1991
  • This study tried to clear the characteristics of height growth pattern depending on Peak Height Velocity age in early, average and late groups. And in it, height growth tendency of girl students in age 7 to 18 years old was compared and investigated in order to know influencing factors, menarcheal age relation. The samples were senior girl students at high school in Seoul. Longitudinal data and survey data were collected in August, 1990. The results could be summarized as follows: 1. On distance curve, the height growth line in early group tended to be the highest and in late group the lowest. On the other hand, on velocity curve late group showed the highest peak and early group showed the lowest peak. In late group, velocity curve was too steep. Of course, these early, average and late groups were classified by PHV age. 2. In these three groups, late group showed the most growth amount per year. However, on distance curve, early group showed higher line than late group. Perhaps this means that peak growth amount in late group might have an effect on mean. 3. Growth amount of adolescence spurt age in these three groups was 6.86cm at age 9(early group), 7.27cm at l1(average group) and 7.65cm at 13(late group). In early group, because. PHV age came too early, it was difficult to find exact adolescence spurt period. In early group, the adolescence spurt period is considered to come at about age 7 to 9. In average group, at 9 to 11 and at 12 to 13 in late group. Especially, spurt of late group was remarkable. 4. When the growth amount of PA, before PA and after PA was compared, growth amount of PA in all three groups was about 20%. In early group, growth amount of APV tended to be large and in late group, that of APV tended to be large and in late group, that of BPV was large. In average group, growth amount of BPV was larger than that of APV. 5. For the purpose of comparing total height growth amount of these groups at age 18, the height growth was assumed to be over. And then, the difference of three groups was studied but it's not significant. 6. Although the difference between height growth and family environment, dietary habits, exercise, disease history in these three groups was investigated, only the income was significant. The significance of all the other factors was not approved. 7. When menarcheal age was compared with PA, generally we know menarche appeared after 1∼2 years of PHV age. But in case of early group, the difference between PHV age and menarcheal age was 5.34 years. In average group, 2.45 years and 0.82 years in late group.

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人工酸性雨 處理가 5年後 몇 가지 造景樹種의 樹高生長, 土壤 酸度와 可溶性 알루미늄의 濃度에 미치는 影響 [I] (Effects of Acid Rain Treatment on Height Growth of Several Landscape Tree Species, pH Value and $Al^{3+}$ Concentration in Soil: Comparison after 5 Years [I])

  • 정용문;우수영;김판기
    • 한국대기환경학회지
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    • 제13권4호
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    • pp.249-256
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    • 1997
  • To identify the long-term influence of acid rain treatment on tree growth, acid rain of various composition (pH 2.0, pH 4.0 and pH 5.6 as control) was applied to several landscape trees for five months (April through August, 1991). Tree height, pH values and $Al^{3+}$ concentration in soil were investigated. Acid rain treatments seemed to promote height growth in the first year (1991), but have become an inhibiting factor over five years. All of coniferous species and most broad-leaved species, except Acer ginnala, showed opposite trends in height responses to acid rain treatments between the first (1991) and last (1996) year. In contrast, Acer ginnala showed similar trends to acid rain treatments in the height growth between 1991 and 1996. This result suggested that Acer ginnala has a characteristic adapability to acid rain stress. pH values of surface soil were lower than those of 30 cm soil depth. This fact suggested that acid rain treatments made surface soil acidic condition. In addition, physiological characteristics (photosynthesis, stomatal condition and biomass) have to be investigated to identify the relationship between long-term effects of $AL^{3+}$ concentration and growth.

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지형(地形), 토양(土壤) 및 기상인자(氣象因子)가 해송(海松)의 수고생장(樹高生長)에 미치는 영향(影響) (The Effects of the topographical, Soil and Meterological Factors on the Tree Height Growth in the Pinus thunbergii Stands)

  • 손영모;정영관
    • 한국산림과학회지
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    • 제83권3호
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    • pp.380-390
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    • 1994
  • 우리나라의 해안지역(海岸地域)에서 주로 생육(生育)하고 있는 해송임분(海松林分)을 대상으로 하여 그의 수고생장(樹高生長)과 생장(生長)에 영향(影響)을 미칠 것으로 예상(豫想)되는 16개의 지형인자(地形因子)와 13개의 토양인자(土壤因子) 그리고 9개의 기상인자(氣象因子)와의 관계(關係)를 분석(分析)하였다. 해송(海松)의 수고생장(樹高生長)에 영향(影響)을 미치는 인자(因子)는 지형인자(地形因子)의 국소지형, 토양견밀도, 토양B층깊이, 유효토심, 토양습도, 모암, 토성 등과 토양인자(土壤因子)의 유효인산, 전질소함량, 염기포화도, 치환성 $Ca^{{+}+}$ 등 그리고 기상인자(氣象因子)의 상대습도와 총강수량으로 나타나 이들 인자(因子)가 수고생장(樹高生長)에 기여(寄與)하고 있음을 알 수 있었다. 따라서 임목(林木)의 생장(生長)에는 지형(地形), 토양(土壤), 기상인자(氣象因子)등이 상호 복합적으로 관여(關與)하고 있으므로, 이들 관여인자(關與因子) 상호간의 관계를 구명(究明)하여 임지(林地)의 임목생산력(林木生産力)을 추정(推定)하고, 적지적수(適地適樹)를 판정(判定)하며, 비배관리(肥培管理) 지침(指針)을 설정(設定)하므로써 해송임분(海松林分)의 합리적(合理的) 경영관리(經營管理)에 기여(寄與)할 것으로 기대(期待)된다.

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