树木不能孤立存在,它必然生存在某种环境中。它的地上部分沐浴在阳光下,同时又被大气所包围,地下部分延伸在土壤中。我们把树木以外的大气空间和土壤空间中的一切因素总称为“环境”,把那些对森林植物生活起显著作用的环境因子称为“生态因子”,由这些因子综合在一起构成的环境叫“生态环 Trees can not exist in isolation, it is bound to survive in some kind of environment. Its aerial parts are bathed in sunlight, surrounded by the atmosphere at the same time, and the underground part extends into the soil. We refer to all the elements in the atmospheric and soil spaces outside the tree as the “environment,” and the environmental factors that play a significant role in the life of the forest plant are called “ecological factors,” and the environment that is formed by the combination of these factors is called " Eco-ring