Abstract

Mineralization resistance of water-soluble organic matter (WSOM) extracted from litter of podzol becomes higher upon the interaction with mineral horizons. Both the portion of WSOM susceptible to mineralization and its mean decomposition rate decrease two and three times, respectively, after its migration through the E eluvial horizon. Sorption in the BF horizon enhances the stability of the input organic matter. The relative content of mineralized carbon decreases to 2% (eight times). In natural soils, adsorbed organic matter may be even more resistant to mineralization due to lower temperatures and biological activity and thus represent the basis for the formation of humus reserve. Taking into account the calculated mineralization rate, the organic carbon accumulation in the BF horizon as a result of WSOM sorption may reach 13.5 mg/100 g per year, but it depends on the concentration of organic substances in soil solutions, hydrological regime, and other factors.

中文翻译：

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矿物视界相互作用前后铁-碘化波佐尔凋落物中水溶性有机物的生化稳定性

摘要

从Podzol凋落物中提取的水溶性有机物（WSOM）的耐矿化性随着与矿层的相互作用而变得更高。WSOM易通过矿化层迁移后，易于矿化的部分及其平均分解速率分别下降了两倍和三倍。高炉层中的吸附增强了输入有机物的稳定性。矿化碳的相对含量降低到2％（八倍）。在天然土壤中，由于较低的温度和生物活性，吸附的有机物甚至可能更抗矿化作用，因此代表了腐殖质储备的形成基础。考虑到计算出的矿化速率，由于WSOM的吸附，高炉层中的有机碳积累可能达到13。