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2020, № 2 (40) |
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ECOLOGY
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Brianskaia I.P., Vasenev V.I., Brykova R.A. |
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Stability of organic matter in soils under various hydrothermal conditions |
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The stability of organic matter in soils and their components is largely determined by temperature and humidity regimes. The study is devoted to the analysis of the response of microbial CO2 emission (basal respiration) of the most common variants of soils used in urban gardening to contrasting hydrothermal conditions. The studied soils were similar in the reaction of the medium, but very contrasting in the total carbon content (from 1.6% to 26.9%). The study of a wide range of temperature (10°C, 22°C, 30°C and 40°C) and soil humidity (withering humidity (WH), lowest moisture content (HW) and full I moisture content (PV)) allowed us to reproduce various meteorological conditions typical of temperate cities during the growing season. The dependence of basal respiration on temperature was statistically significant and had a pronounced linear character with regression coefficients from 0.88 (for a peat-sand mixture) to 0.94 (for compost), which confirmed the determining influence of the nature of the temperature regime on the sustainable functioning of urban soils
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