РАЗНООБРАЗИЕ СЕЛЕКЦИОННЫХ ФОРМ ЕЛИ ПО СТРОЕНИЮ КОРЫ В ПРИКАМЬЕ

Abstract

Lately in many countries of the world there has been a massive drying up of spruce stands. Bark form testifies to trees stability to environmental unfavorable factors. Investigations were underway in the central part of Russia, in the zone of coniferous-broadleaved (mixed) forests of Permsky kray. Above scientists established that in the Permsky kray spruce trees with smooth, scaled and longitudinally fissured fracture bark types can be found. The purpose is to determine spruce selective forms the most stable for drying off according to their bark structure. Based on the materials of 9 sample plots, it was established that the sanitary condition of the spruce trees in all the investigated spruce stands was unsatisfactory. According to investigation data in all the SP stands there are dried off trees whose number a varied from 28.4 to 69.6 %. The results of investigations have shown that in stands of all sample plots specimen of spruce with scaled bark form are prevailed. The number of spruce trees with scaled bark varies from 83.1 to 98.9%. Rarely are spruce trees with longitudinally fissured and smooth bark types. We succeeded in singling out a new spruce form according bark structure – smooth warty form too. Share of spruce trees with this bark type does not exceed 4.2 % on stocking. Spruce trees of all the bark forms are subjected significantly to drying off, except the trees with smooth warty form. The conservation of spruce trees with a smooth warty bark form is 100 % on all SP within which specimens of spruce of this bark form were found.