根系虽是植物不可缺少的器官,但对它的生长与发育,却相对地了解得较少。关于根的生理、生态和遗传影响方面的知识,就森林树种来说,龙其缺乏。究其原因,主要是作为研究根生长的传统方法,存在着一些技术上的困难。通过遗传、环境或栽培手段等以控制根系的能力,会给林木生长和产量的改进提供可能性。许多植物种的根系会产生遗传变异,并受许多环境因素的影响。对于林木高产来说,根 Although the root system is an indispensable organ of plants, but its growth and development, but relatively less understood. Knowledge of the physiological, ecological, and genetic effects of roots is lacking for forest species. The reason is mainly as a traditional method of studying root growth, there are some technical difficulties. The ability to control the root system through genetic, environmental or cultural means, etc., offers the possibility of improving forest growth and yield. The root system of many plant species produces genetic variation and is influenced by many environmental factors. For high-yielding trees, roots