소나무 成長率 測定에 關한 硏究 = Studies on the Measurment of Growth rate in Pinus densiflora

국문 초록 (Abstract)

本校演習林 德津事業區의 소나무 成長過程을 調査하기 위하여 소나무 106本을 代採 樹幹析解에 의하여 材積成長率, 胸高直徑成長率, 材積成長率과 胸高直徑成長率과의 關係 및 胸高形數등을 調査分析하였는데 그 結果는 다음과 같다.
1. 材積成長率은 令級의 增加에 따라 점점 적어져 老令木에 達하게 되면 거의 一定하게 되리라 推測한다.
2. 胸高直徑成長率도 위와 같은 令級이 增加함게 따라서 점점 적어져 老令木에 達하면 거의 一定하게 될 것이다.
3. 胸高直徑成長率과 材積成長率과의 關係는 Breymann이 發表한 b=2보다 b=2.5를 使用하는 것이 本校演習林內에서는 誤差가 적을 것으로 思料된다.
4. 胸高形數는 令級이 增加함에 따라서 점점 減少되므로 0.45를 使用한 現行 一般材積表는 幼令木에서는 過小値를 老令木에서는 過大値를 주므로 本校內에서는 Ⅰ∼Ⅱ令級에서는 0.57, Ⅱ∼Ⅲ令級에서는 0.51, Ⅲ∼Ⅳ令級에서는 0.45를 使用하면 誤差가 적을 것으로 思料된다.

다국어 초록 (Multilingual Abstract)

In order to investigate the growth percentage of red pine, auther had 106 trees cut and made analysis on them and analysed volume growth percentage, diameter growth percentage, the relation between diameter growth percentage and volume growth percentage and breast-hight form-factor.
The result was as follows.
1. The volume growth percentage decreased as age class increased and it would be constant from a certain age class.
2. The diameter growth percentage decreased as the age class increased and it would be constant from a certain age class.
3. As for the relation between the diameter growth percentage and volume growth percentage, the most frequency of constant b was 2.5 in Chunpuk National University forest.
4. The breast-height form-factor decreased as age class increased and the factors of red pine in Chunpuk National University forest were 0.57 in age class Ⅰ-Ⅱ, 0.51 in age class Ⅱ-Ⅲ and 0,45 in age class Ⅲ-Ⅳ