• Title/Summary/Keyword: shading pretreatment

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Effects of Inorganic Environmental Factors on the Growth of Pinus koraiensis Seedlings (X) -The Influence of Shading Pretreatment and Density on the Needle Growth and Other Organs in the Transplanting Bed- (무기적(無機的) 환경요인(環境要因)이 잣나무 유묘(幼苗)의 생육(生育)에 미치는 영향(影響)에 관(關)한 연구(硏究)(X) -이식상(移植床)에서의 엽(葉) 생장(生長)과 타(他) 기관(器官) 생장(生長)과의 관계(關係)-)

  • Kim, Young Chai;Chon, Sang Keun
    • Journal of Korean Society of Forest Science
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    • v.78 no.2
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    • pp.143-150
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    • 1989

  • This research was performed to estimate the influence of relative light intensity and planting density on the growth of dry weight of needles and other organs growth in Korean white pine seedlings raised in the transplanting bed. 1. As treated with various light intensities, relationships between needle dry weight and growth of other organs(dry weight of shoot, root and diameter of seedlings) had significantly positive correlations and linear regressions, but regression between needle dry weight and seedling elongation was a second degree polynomial. As treated with various planting densities, the second degree regression curve was found between needle dry weight and shoot dry weight, and seedling elongation, And linear regression between needle dry weight and root dry weight, and seedling dry weight could be estimated, while any regression between needle dry weight and diameter was not recognized. 2. As treated with various light intensities, linear regression between leaf area and shoot dry weight, and seedling dry weight, exponential regression between leaf area and seedling elongation were significantly recognized, while a tendency of logarithmic regression between leaf area and diameter appeared. According to the different density treatment, logarithmic regression between leaf area and shoot dry weight, linear regression between leaf area and root dry weight, and seedling dry weight, but quadric regression between leaf area and seedling elongation and diameter were significantly found.

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