我国林业发展和生态建设中涉及的最主要问题就是森林培育、森林保护、森林利用和森林管理问题，而树种选择和树种改良问题又是最基本的问题，从某种程度上讲，甚至决定着造林的成效和林业的发展方向。事实证明，造林树种通过遗传改良又是林业生产最为有效的途径，可以直接将科 The most important issues involved in China’s forestry development and ecological construction are the issues of forest cultivation, forest protection, forest utilization and forest management. However, the issue of tree species selection and tree species improvement is the most basic one. To some extent, it even determines The effectiveness of afforestation and forestry development. Facts have proved that afforestation trees through genetic improvement is the most effective way of forestry production, you can directly Branch