põhipära

Põhipära is an Estonian term that translates to "main stem" or "main trunk." It is most commonly used in forestry and arboriculture to refer to the primary vertical or near-vertical axis of a tree. This central stem is crucial for the tree's structural integrity and its ability to transport water and nutrients from the roots to the canopy.

In forestry, understanding the põhipära is important for assessing timber quality. A well-formed põhipära, free from major defects like forks, large branches, or decay, is indicative of high-value lumber. Foresters consider the diameter, straightness, and length of the põhipära when determining a tree's potential yield and suitability for specific uses.

In arboriculture, the põhipära is also a key consideration for tree health and stability. If a tree develops multiple strong competing stems (known as co-dominant stems), it can lead to structural weaknesses and increased susceptibility to wind damage or disease. Arborists may intervene through pruning to encourage the development of a single, strong põhipära, thereby enhancing the tree's longevity and safety. The shape and development of the põhipära are influenced by genetics, environmental factors, and silvicultural practices.