Assessing the Importance of Biotic Factors in Tree Development
2013
ŞULEA, Constantin | OROIAN, Ioan | COVRIG, Ilie | TĂUT, Ioan | BURDUHOS, Petru
Severe worsening of the phytosanitary status of forest trees was reported in last years, mainly due to the climatic conditions, low biological resistance of trees, and forest management mistakes. The main aims and objectives of this paper are to emphasize the effect of harmful biotic factors in different phases of tree development. The trial was carried out under the Forestry Office Satu Mare, on an experimental area located in the Forest District of Satu Mare, on 0.25 ha. It consisted in two parts, one containing the 25 years old oak with second production class, and the other containing the 25 years old hornbeam with third production class. In oak, 31% have dried thin branches, over 20% have the entire crown dried, and 15% present the same symptom but with a less than 20% intensity. In hornbeam, 7% of trees present crown dryings, thin branches below 20% or thick dried branches between 1 and 5 %.
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