林业科学2011，Vol.47Issue(9)：140-147,8.
苗木切根技术研究进展
A Review on Advances of Root Pruning Technology of Tree Seedlings
摘要
Abstract
As technologies become more precise to deal with each aspect on silviculture, great attention has been putting on the root pruning which is viewed as the most important root culturing. In this paper, root pruning includes bud-seedling root pruning, post-seedling root pruning, and table pruning. Post-seedling root pruning is divided into undercutting, wrenching, lateral pruning and box pruning. For each type, effects of root pruning on the morphological attributes, physiological attributes and field performance was reviewed. When Pinus radiata, characterized by a carrot - like taproot tree species, is severed by bud-seedling root pruning, undercutting and wrenching, a loss in apical dominance in the entire root system was caused. Following that shoot growth is arrested, lateral root growth increases, a more compact and fibrous root system develops, and shoot-root ratio decreases. These are attributed to the field performance especially in the arid areas. Slower growing evergreen species such as Pseudotsuga menziesii tend to have a more fibrous root system than P. Radiata. Results from root cutting of the species have been more variable. Although hormones, mineral nutrition, carbohydrate, water in the seedlings were responded to root pruning, mechanism of seedling quality regulated by root pruning was inconsistent.关键词
芽苗切根/根系平截/扭根/苗木质量/造林效果Key words
bud-seedling root pruning/ undercutting/ wrenching root/ seedling quality/ field performance分类
农业科技引用本文复制引用
李国雷,刘勇,祝燕..苗木切根技术研究进展[J].林业科学,2011,47(9):140-147,8.基金项目
中央高校基本科研业务费专项资金(JD2011-03、BLJD200905). （JD2011-03、BLJD200905）
