Abstract

The spatiotemporal variability of CO₂ emission from soils of Kursk under different land uses, pollution levels, and soil geneses has been assessed. Data on the seasonal dynamics of CO₂ emissions in background (forested recreational areas) and urban soils under the anthropogenic impact are presented. Seasonal dynamics of soil СО₂ emission depends on a number of factors: season, type of soil, organic matter content, anthropogenic modifications of soil profiles, hydrothermic conditions, and heavy metal pollution. Soil hydrothermic conditions to a greater extent determine the intensity and characteristics of the seasonal dynamics of soil CO₂ emission with a maximum in summer. In anthropogenic soils, multidirectional transformation of soil CO₂ emissions is noted. The intensity of CO₂ emission from soils of various geneses is quite different. Heavy metal pollution of the soil has an ambiguous effect on the CO₂ emission processes. The CO₂ emission rate from Urbic Technosol increased by 16.4% in comparison with that from the background Luvic Chernozem (Loamic, Pachic), while for Technic Greyzemic Phaeozem (Loamic) this parameter decreased by 47% in comparison with the background Greyzemic Phaeozem (Loamic). In Carbic Podzols polluted by heavy metals, the averaged CO₂ emissions are generally similar to those from the background soils unpolluted by heavy metals.

中文翻译：

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库尔斯克土壤СO2排放的季节动态

摘要

评估了库尔斯克土壤在不同土地利用，污染水平和土壤成因下的CO ₂排放时空变化。本文介绍了在人为影响下背景（森林休闲区）和城市土壤中CO ₂排放的季节性动态数据。土壤СО的季节变化₂发射取决于许多因素：季节，土壤，有机质含量，土壤剖面，水热条件人为修饰的类型，和重金属污染。土壤水热条件在很大程度上决定了土壤CO ₂的季节动态的强度和特征。夏季最高排放。在人为土壤中，注意到了土壤CO ₂排放的多向转化。来自不同成因的土壤中的CO ₂排放强度是完全不同的。土壤的重金属污染对CO ₂排放过程有模糊的影响。与背景Luvic Chernozem（Loamic，Pachic）相比，Urbic Technosol的CO ₂排放量增加了16.4％，而对于Technic Greyzemic Phaeozem（Loamic），该参数与背景Greyzemic Phaeozem（Loamic）相比降低了47％。 ）。在重金属污染的水生角足动物中，平均CO ₂ 排放通常与未被重金属污染的背景土壤的排放相似。