DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/2020 str. 62 <-- 62 --> PDF |
contained only one tree species. The arrangement of species alternated between the plots. A randomized block design was used, with 4 blocks and 3 replicates. Tree heights were measured for 5 consecutive years not during the growing season. Breast height diameters were measured at the end of the observed period. The impact and intensity of powdery mildew has been observed for three years during the summer months. The aim of the research is to study the growth and development of pedunculate oak and sessile oak seedlings in an area where these species were not commonly grown, although there are adequate ecological and economic conditions. After 5 years of measurement, the number of plants was reduced by 14%. In pedunculate oak the number of trees was reduced by 4 to 8%, and in sessile oak by 17 to 22%. The height and breast height diameters of the trees grown within the shelters were significantly higher regardless of the tree species. The height and breast height diameter of pedunculate oak trees was significantly larger than of sessile oak trees. No correlation was found between tree height and the presence of powdery mildew. Key words: conversion, growth, polyproyilene tree shelters, tree heights, FOPER forest, Zelendvor, pedunculate oak, sessile oak |