Ключові слова
stand tending felling intensity
stand mensuration characteristics
health condition index
relative slenderness ratio Pinus sylvestris L.
інтенсивність рубок догляду
таксаційні показники
індекс стану
відносна висота (H/D)
Як цитувати
Анотація
Проведено аналіз таксаційних показників, стійкості та стану штучних соснових насаджень за 26-річний період на досліді з вивчення рубок догляду в умовах Північного Степу (на прикладі Ізюмського пристепового бору). Виявлено, що в штучних соснових насадженнях можливо зменшити кількість рубок догляду, підвищивши їхню інтенсивність, за умови контролю густоти та стійкості насаджень на всіх етапах. Проведення проріджувань помірної (18 % за запасом) та високої (28–30 % за запасом) інтенсивності до густоти 1,6–1,2 тис. екз. га-1 сприяло збільшенню середнього діаметра насаджень на 5–34 %, середньої висоти – на 6–11 % та підвищенню стійкості до фізичних впливів (зниження відносної висоти (H/D) до 96–101), суттєво не впливаючи на запас деревостанів. Проведення прохідної рубки помірної та високої інтенсивності (22–28 % за запасом) до густоти 1,0–0,7 тис. екз. на 1 га дало змогу збільшити середній діаметр на 33–42% та підвищити стійкість насаджень (зменшення H/D до 89–96), не призводячи до втрат загального запасу в довгостроковій перспективі.
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