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森林并不是许多树木的简单总和,而是具有一定结构的群体。树木在林地上的一定数量(密度)及其排列方式(配置)形成一定的水平结构,同一林分中的不同树种(组成)或不同年龄的同一树种在森林纵断面上发育为不同的林层,形成一定的垂直结构。森林的结构就是其水平结构和垂直结构的结合。人工林为了更好地发挥作用,需要有一定的合理的群体结构。用材林的群体结构应能保证树木个体之间的相互关系(包括种内的和种间的)可以得到较好的调节,由这些个体所组成的群体能最充分地利用营养空间,发挥最大的生产潜力,使人工林尽可能地速生、丰产、优质。因此,理想的用材林应当具有分布均匀、稀密适中、复层林冠(或林冠层较厚)的
The forest is not a simple sum of many trees, but a group of people with a certain structure. A certain number of trees in the woodland (density) and its arrangement (configuration) to form a certain horizontal structure, the same tree species (composition) or different ages of the same species in the forest longitudinal section of the development of different forest , Forming a certain vertical structure. The structure of a forest is the combination of its horizontal and vertical structures. Plantations need to have a reasonable population structure in order to function better. The community structure of timber forests should ensure that the interrelationships (including intraspecies and interspecies) among individual trees can be well regulated. The groups formed by these individuals can make the best use of the nutrition space and maximize their production Potential to plantation as fast as possible, high yield, high quality. Therefore, the ideal timber forest should have a uniform distribution, moderate density, the canopy (or canopy thicker)