배지의 pH 가 몇 침엽수의 유묘생장(幼苗生長)에 미치는 영향 : pH 를 달리한 사경(砂耕)에서 유묘의 T-R 율 , 생장 및 생체 pH 에 관하여 Relation of T-R ratio , Growth and Seedling's pH in Sand Culture of Different pH = Effect of Culture Soils pH on Some Coniferous Seedling Growth

다국어 초록 (Multilingual Abstract)

This experiment is a comparative study of influence on the seedling in individual pH treatment of culture soil
Ⅰ. T-R ratio and growth
1. T-R ratio has almost similar tendency in its range according to tree species, but in individual treatment there were lots of differences.
In the strong acidic and the strong alkali conditions T-R ratio was small.
This means the seedling body is out of balance.
2. Where the resistance to H-ion was stronger, the growth of root-system, that is, the resistance of fine root was comparatively better.
3. The growth of root system was greatly influenced by pH, and in the condition of pH3, pH8, pH9, the growth was especially worse.
4. Ginkgo biloba, Pinus rigida and Pinus banksiana kept on growing in the strong acidic condition.
5. The growth season has higher pH of culture soil than the dormant season, and tree species which have strong resistance of acidic had better growth and had stronger resistance of draught in the acidic condition of culture soil ; especially, Pinus rigida and Pinus banksiana were worse in the alkali condition.
Ⅱ Seedling pH
1. According to the tree species, there were differences in seedling pH, and tree species, considred to be strong in resistance of draught, had been high in seedling pH.
2. Seedling pH of the growth season was higher than that of the dormant season.
3. Seedling pH was not significant in pH treatment of the culture soil.