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林木定向培育密度是指培育一定规格的林木（工艺成熟材、苗木）在造林（育苗）或间伐时应定植或保留的合理密度。自１９８５年以来，历经１０年，通过研究基径与地上部分总生物量的关系、基径与林木地上部分所占空间的关系、单位面积地上生物量与所占空间的关系等，调查了１８１０株树，积累了上万个数据，建立了林木定向培育密度公式。该公式经验证，适用于榆、杨、椿等木本植物及部分草本植物。本文仅阐述该公式的应用方法及可靠性验证。
The density of forest-oriented cultivation refers to the cultivation of certain specifications of trees (mature technology, seedlings) afforestation (nursery) or thinning should be planted or retained at a reasonable density. Since 1985, after 10 years, by studying the relationship between the base diameter and the aboveground biomass, the relationship between the base diameter and the space occupied by the forest floor, the relationship between the above ground biomass and the space occupied, 1810 Strain tree, has accumulated tens of thousands of data, set up a tree planting orientation density formula. The formula is validated for elm, Yang, Chun and other woody plants and some herbs. This article only describes the application of the formula and reliability verification.