E3S Web Conf.
Volume 284, 2021Topical Problems of Green Architecture, Civil and Environmental Engineering (TPACEE-2021)
|Number of page(s)||8|
|Section||Agribusiness and Soil Management|
|Published online||12 July 2021|
Conditions and factors of humus formation in soils of mountain and foothill
1 Research Institute of Soil Sciences and Agrochemistry, Kamarniso str., Tashkent, 100174 Uzbekistan
2 Tashkent State Agrarian University, University str., 2, Tashkent province, 100174 Uzbekistan
* Corresponding author: firstname.lastname@example.org
On the basis of information on the climatic factor, the intensity of humus formation in the soil was estimated. It was revealed that as the transition from the plain to the foothills and low mountains due to changes in atmospheric precipitation and hydrothermal regime, the period of biological activity (PBA) of the soil increases from the plain to the mountains. The balance of annual radiation in the foothill plain is 47 kcal/cm2, in the high-mountain belt - 53 kcal/cm2. As the transition from the plain to the mountainous part of the relief, an increase in soil PBA was revealed and, in accordance with this, the content and reserves of humus, as well as labile humic substances in the humus composition, increase. By the type of humus, light gray soils are humate-fulvate and fulvate; typical, dark gray soils and mountain brown soils, fulvate-humate; light brown meadow-steppe soils, and humate. It also provides information on the energy reserves of humus for the considered soils. The correlations between the indicators of PBA and humus for horizon “A” in the studied soils were calculated.
© The Authors, published by EDP Sciences, 2021
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