Subordination Pruning to Create Apical Dominance скачать в хорошем качестве

Subordination Pruning to Create Apical Dominance

Subordination pruning on young trees with co-dominant stems is an extremely effective technique at correcting future structural issues while reducing the potential for future structural issues caused by chainsaw-induced decay (CID). Trees evolved to reach for the light in the highly competitive environment of the forest. One technique they use to maximize their ability to reach for the light is to allow the highest tips to get the most growth by inhibiting the growth of the lower limbs. Thus the apex of the tree is the highest point if the tree, and will get the most growth. This is the reason that trees grow more up than out. When a tree has two co-dominant stems of equal height, the lack of apical dominance will have both stems grow equally. By reducing the height of on stem, the arborist can induce apical dominance that will end up retarding the growth of the pruned, and thus subordinated, stem. This is called subordination pruning and it is surprising just how little one needs to reduce the stem to induce apical dominance. The result of fostering a strong leader will greatly improve the tree's structure by preventing included bark. Rather than one side of the co-dominant stem pushing on the other side at the branch union, the dominant stem will tend to grow around and envelop the subordinated stem, thus preventing the stem from splitting some years later.