esoilБюллетень Почвенного института имени В.В. ДокучаеваDokuchaev Soil Bulletin0136-16942312-4202V.V. Dokuchaev Soil Science Institute10.19047/0136-1694-2025-122-41-61esoil-879Research ArticleСтатьиМодели начального разложения хвои сосны обыкновенной в среднетаежных условиях Восточной ФенноскандииModels of early destruction of Scots pine needles in the middle taiga of Eastern Fennoscandiahttps://orcid.org/0000-0002-4614-5710СолодовниковА. Н.SolodovnikovA. N.

185910, Петрозаводск, ул. Пушкинская, 11

11 Pushkinskaya St., Petrozavodsk 185910

solod@krc.karelia.ruИнститут леса КарНЦ РАНРоссияForest Research Institute, Karelian Research Centre, Russian Academy of SciencesRussian Federation20252603202501224161Copyright © Солодовников А.Н., 20252025Солодовников А.Н.Solodovnikov A.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://bulletin.esoil.ru/jour/article/view/879

Разложение опада хвои изучалось путем последовательной серии из трех двухгодичных опытов в сосновом лесу. Анализ показал значимое влияние погодных условий только на два первых месяца разложения хвои. Анализ динамики разложения хвои в наших экспериментах показал, что в процессе начальной деструкции хвои можно выделить три стадии разложения: быструю (первый теплый период, потери массы хвои до ~30%); умеренную (от начала первого холодного периода до начала второго холодного периода, от ~30% до ~55% общей потери массы хвои); замедленную (от начала второго холодного периода, от ~55% общей потери массы хвои и далее). Сравнение хода разложения с асимптотической моделью показало расхождение годовой потери хвои на 10–13%. Причиной является специфичный характер разложения химических компонентов хвои, в особенности лигнина/AUR. Сделана попытка смоделировать разложение хвои на основе характера разложения различных химических компонентов хвои. Полученная модель и ее упрощенный вариант достаточно точно отражают характер разложения, однако имеют ряд существенных ограничений.

Decomposition of needle litter was studied in a series of three successive two-year experiments in a pine forest. The effect of the weather conditions proved to be significant only in the first two months of needle decomposition. Analysis of the dynamics of needle degradation in our experiments shows the early needle destruction process falls into three phases: fast (the first warm period, up to ~30% needle mass loss); moderate (from the onset of the first cold period to the onset of the second cold period, ~30% to ~55% total needle mass loss); slow (from the onset of the second cold period, from ~55% total needle mass loss onward). A comparison of empirical data on degradation dynamics with the asymptotic model revealed a 10–13% misfit in annual needle loss. The reason is the specific features of decomposition of certain chemical components of needles, especially lignin/AUR. An attempt was made to simulate the destruction of needles based on the decomposition patterns of their various chemical components. The resultant model and its simplified version quite accurately reflect the destruction characteristics but have some substantial limitations.

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The authors declare that there are no conflicts of interest present.