Ocena kondycji modrzewia Larix decidua Mill. subsp. polonica (Racib.) Domin i innych gatunków drzew na Chełmowej Górze w Świętokrzyskim Parku Narodowym

The objective of the study was to evaluate the health condition (defoliation) and vitality of Polish larch, fir, beech, pine and two native oak species growing on Chełmowa Góra in the Świętokrzyski National Park. Sample trees were selected using a survey sampling, simple random sampling without replacement (lpbz) and two−stage sampling (with lpbz on both stages) (l2s: I−lpbz, II−lpbz) were employed. The spatial distribution of the fractions of trees in defoliation and vitality classes in the stand allowed to categorize the examined species with regard to their health condition (from ‘best’ to ‘worst’) in the following order: Polish larch, beech, pine, oaks and fir (in the case of defoliation) and Polish larch, beech, pine, fir and oaks (for vitality). The estimation errors for the fractions of trees in defoliation and vitality classes ranged from 0.013 to 0.076.