Abstract
This study was conducted to examine the effect of root pruning intensity on the seedling growth of Pinus densiflora. One-year-old seedling was pruned by 0%, 25%, 50% and 75% from the total root length before transplanting. After one year, above-ground growth(survival rate, seedling height, root-collar diameter, shoot dry weight, branch number and needle weight) and root growth(root length and root dry weight) were investigated. Survival rate of pruned seedlings was better than that of non-pruned seedlings. However, there was no significant differences among root pruning treatments. Excellent above-ground growth was found in non-pruned and 25% root-pruned seedlings. The seedlings pruned by 25% showed superior root to shoot ratio and seedling quality index, which were usually used as measures to determine seedling quality. Therefore, root pruning was highly recommended before transplanting of 1-0 bare root seedling of P. densiflora for enhancing survival rate. In this case, appropriate root pruning intensity was 25% of the total root length of seedling.
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