Zasięg i dynamika rozprzestrzeniania się zgnilizny wewnątrz pni jodeł w wyniku ich spałowania przez jeleniowate

The paper presents research results on the extent and rate of horizontal and vertical infection spread process inside fir stems as a result of bark stripping by game and factors determining infection development. The material collected in the stands of the Forest Experimental Station in Krynica (Beskid Sądecki) allows to state that the infection affected exclusively those tree rings which had been formed before wounding. The radial spread of the infection was on average 17% of the cross−sectional area of the stem at a height of the wound centre, and the axial spread was maximally up to 3 m above the ground level. The average rate of horizontal spread of decay inward the stem was 2% of the cross−sectional area per year and that of the movement of decay fungi up and down the tree – 4.7 cm per year. The most important factors affecting infection development inside the stem were: the per cent of wound closure, age and wound size, as well as tree dimensions at the time of bark stripping. The higher degree of decay significantly lowered the index value of the growth predisposition and vitality of damaged young firs.