造林树种苗木定向培育理论探讨

为解决苗木培育的技术难题 ,作者提出了苗木定向培育的概念 .苗木定向培育 ,是根据造林地立地条件主要限制因子对苗木的要求 ,在苗木培育过程中采取相应调控技术措施 ,使苗木在形态、生理及活力等方面满足造林需要 ,做到适地适树造林 .我们以困难立地条件下造林用苗为目标 ,阐述了苗木定向培育技术体系 ,通过不同的育苗技术措施 ,如抗性基因与种源选择、林木种子处理技术、苗木抗逆性调控技术、苗木活力保护技术与管理技术等措施 ,为做到适地适苗造林提供理论依据

Theories of directed seedling cultivation for reforestation varieties

In order to tackle with the technical problems of seedling cultivation,the authors put forward the concept of directed cultivation of seedlings.The directed seedling cultivation is to use required control technologies to allow the seedlings to meet the forestation requirement in terms of shape,physiology and viability so that forestation can be conducted in line with the site condition and seedling type.Targeting on seedlings used under difficult planting site conditions,the article elaborates on a series of modification and control technologies for directed seedling cultivation,including various technological measures taken during the seedling raising stage,such as resistant gene and selection of varieties, tree seeds processing technology,seedling resistance modification and control technology,and seedling viability protection and management.It provides theoretical basis for directed and high quality seedlings,and for matching stock to planting site.