世界形态改良苗木生产技术发展现状和趋势

从充分发挥林木遗传改良种子的增产潜力出发，综合世界林业生产先进国家在形态改良苗木培育领域的经验，介绍了几项目前在我国可行的，能有效利用种子，培育出以提高根系质量为中心的苗木培育技术。

Development and Tendency for the Technology of Morphological Improvement of Tree Seedlings in the World

Production of quality tree seedlings is an important link in the intensive management of man-made industrial forests.It is a lever to transform the yield-increasing potentiality of genetically improved seed into actual productive force.With emphasis on giving full play to the yield-increasing potentiality of genetically improved tree seeds and summing up the experiences in breeding morphologically improved tree seedlings(healthy seedlings) in countries with advanced techniques in forest production in the world,the paper selectively introduces some seedling culturing techniques which are feasible in China,and by which tree seed can be effectively used to raise seedlings with improved root systems as the central link in culture.The techniques include seed gathering from separate clones,sowing seed of families separately in beds,root system and new shoots trimming,application of mycorrhiza fungus and seeding at a low rate,etc.Some of them have been routine techniques,some are new techniques in development.Learning and application of these techniques will reduce the gap between the seeding raising technique in China and that of international level,and can meet the requirements of good seed and healthy seedlings for establishing the fast growing and high yielding plantations.