Water-physical properties of drained peat soils of Northern Trans-Ural forest-steppe zone

Energy Management of Municipal Transportation Facilities and Transport - EMMFT 2017

Motorin, A.S.^1 ; Bukin, A.V.^1 ; Iglovikov, A.V.^1

Northern Trans-Ural State Agricultural University, Respubliki str. 7, Tyumen

625003, Russia^1

关键词: Economic use;    Forest-steppe zone;    Long term study;    Mineral soils;    Moisture capacity;    Rooting zones;    Solid-phase;    Water capacity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/90/1/012053/pdf
DOI  :  10.1088/1755-1315/90/1/012053

来源: IOP

【 摘 要 】

The results of long-term studies (1976-2016) of water-physical properties of long-seasonally-frozen peat soils of Northern Trans-Ural are set out. It is shown that the changes in water-physical properties are functional in nature and primarily due to economic use of soil and the condition of its surface. A significant influence on the composition density of peat soils, especially in the first years after drainage, has the process of shrinking. In the conditions of Northern Trans-Ural annual reduction in the value of peat soils is 1.5 cm in the first five years after drainage, 1-1.2 cm for 15 years and 0.6-0.7 cm in subsequent years. In the first five years after drainage, the density of the composition in the layer 0.2 m increased by 7.4%, declining to 2.1-3.0% in subsequent years. At a depth of 0.6-1.0 m in 5 years after drainage there is no significant change of addition density. A significant increase in the density of the addition of peat-gley soil established by plowing underlying mineral soil. A relatively stable indicator is the density of the solid phase of the soil. For 35 years, the density of the solid phase medium peat soil layer of 0.3 m increased by 5.4%; low power over a 20 year period by 1.2%. The least moisture capacity medium peat soil over a 35-year period in the rooting zone (0.3 m) layer was reduced by 11.5%; at a depth of 0.6-1.0 m - by 3.7%. In thin peat soil reduction of water capacity in the layer of 0.3 m in 20 years was 6.4%; in peat (0.2 m) layer of peaty gley soil during the same period - by 10.2%.