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本文从生产力与环境关系角度,比较分析了森林第一性生产力的地理分布特征,阐述了层的生产力与环境间的关系以及种生产力与群落结构间的关系。结果表明:森林净生产力,地上部年凋落量随纬度和海拔高度的增加而减少,而凋落物现存量呈相反的变化趋势,森林生产力的地理分布与环境水热条件密切相关;森林生物量无明显的地理规律性变化,但多物种复杂结构的成熟天然林生物量较高;层的生产力随环境条件产生相互排斥或补充各异变化;种的生产力反映了种在群落中的地位和作用,决定群落的结构特征。
This paper analyzes the geographical distribution of primary productivity of forestry from the perspective of the relationship between productivity and environment and expounds the relationship between productivity and environment and the relationship between species productivity and community structure. The results showed that the net forest productivity and annual litterfall decreased with the increase of latitude and altitude, while the litterfall present the opposite trend. The geographical distribution of forest productivity was closely related to the environmental hydrothermal conditions. The forest biomass Obvious changes in geographical regularity, but the biomass of mature natural forest with multi-species complex structure is higher; the productivity of layers is mutually exclusive or supplement with environmental conditions; the productivity of species reflects the status and role of species in the community, Determine the structural characteristics of the community.