The experience of the complex assessment of the impact of the length of agricultural use on properties and regimes of agrochernozems of stony steppe

Lebedeva, I. I.; Bazykina, G. S.; Гребенников, А. М.; Cheverdin, Yu. I.; Bespalov, V. A.

doi:10.19047/0136-1694-2016-83-77-102

Cited by 7 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…В качестве такого показателя предлагается использовать краевой угол смачивания, характеризующий гидрофобно-гидрофильные свойства поверхности твердой фазы почв и связанный с содержанием и качественным составом органического вещества в почве (Милановский и др., 2005; Милановский, 2009; . Поверхностные свойства твердой фазы, такие как гидрофобность и гидрофильность, влияют на образование межчастичных контактов и типы образующихся структур ; Хайдапова и др., 2016). При этом в процессе гумификации/минерализации происходит трансформация органического вещества (ОВ), гидрофобно-гидрофильные свойства которого зависят от условий его образования, т. е. от количества воды и кислорода Милановский, Шеин, 2002).…”

Section: The Contact Angle Of Wetting As An Integral Indicator Of Phyunclassified

The contact angle of wetting as an integral indicator of physical-chemical properties of Сhernozems of Kamennaya Steppe

Matveeva

Милановский

Хайдапова

et al. 2020

DSB

View full text Add to dashboard Cite

Section: The Contact Angle Of Wetting As An Integral Indicator Of Phyunclassified

The contact angle of wetting as an integral indicator of physical-chemical properties of Сhernozems of Kamennaya Steppe

Matveeva

Милановский

Хайдапова

et al. 2020

DSB

View full text Add to dashboard Cite

Dynamics of soil formation factors and their influence on agricultural technology in the Kamennaya Steppe

Исаев

Belobrov

Ivanov

2020

DSB

View full text Add to dashboard Cite

The analysis of long-term observations in the Kamennaya Steppe (over 125 years) for climatic parameters (air temperature and precipitation), ground water level, vegetation species composition revealed the main trends in their variability. Since 1969 there has been an increase in temperature and a reduction in temperature fluctuation during the year. Over the last 30 years, the difference has reached 1.90, and over the last decade it has grown by 0.40 due to the cold season. The amount of precipitation over the same 50-year period has not changed much. In total, an increase of 45 mm was observed over the decade (1999-2008). In the XXI century, there has been registered an increase in the amount of precipitation in the cold season by 12.7% and a decrease in the warm season, which creates certain prerequisites for climate continentality mitigation during the annual cycle. During the first 70 years of observations, the groundwater level in the well No. 1 was on average at the depth of 6.5 m (5.7-7.3 m). At the end of the XX century and at the beginning of the XXI century, there was marked a pronounced rise in the ground water level, the average depth was 3.8 m, which coincided with the growth of average annual temperature and an increase in total rainfall. In this period changes in the long-term regime of ground and surface soil moisture resultedin expanding the area of wetlands and hydromorphic soils on the territory of the steppe. The period of 2009-2018 is characterized by a continued increase in average annual temperatures and a decrease in precipitation, which may lead to a seasonal change in temperature and precipitation to milder and wetter winters and warmer and drier summers. Transformation of vegetation for 100 years of observations had several stages with a general trend to change the steppe grasslands to meadow-steppe, shrubs and woody species.

show abstract

Changes in the hydrophobic-hydrophilic properties of the organic matter of the chernozems of the Kamennaya Steppe

Matveeva¹,

Милановский²,

Rogova³

2021

DSB

View full text Add to dashboard Cite

Soil samples and physical size-density fractions isolated from them (silt particle size less than 1 µm, light fraction (LF) with a density of less than 2 g/cm3 and a fraction of the residue) of ordinary chernozem were studied in three contrasting variants of the experimental fields of the Kamennaya Steppe agrolandscape of the Voronezh region: mowed steppe, long-term permanent bare fallow and permanent corn – the main differences of which are in tillage (cultivated and not cultivated lands) and in the supply/absence of plant residues and root secretions. The LF content changes in the series: “mowed steppe” > “permanent corn” > “permanent bare fallow”, which corresponds to the direction of changes in the total carbon content of the soil and a decrease in the value of the contact angle of wetting (CA) of the surface of the solid phase of the studied chernozems. The determination of the total C and N content revealed the change in the qualitative and quantitative composition of the size-density fractions for different land use cases. Chromatographic fractionation of alkaline extractions of humus substances (HS) of chernozem samples and size-density fractions revealed an increase in the degree of hydrophilicity of HS while simultaneously increasing the hydrophobicity of the solid phase surface and the carbon content in the soil. HS of LF of the “mowed steppe” turned out to be by 63% more hydrophilic than HS of LF of “permanent bare fallow” and by 47% more hydrophilic than HS of LF of “permanent corn”. While the hydrophilicity of the HS silt differed by 16 and 27%, respectively. The hydrophilicity of the HS of the original soil in the plot of the “mowed steppe” was by 41% higher than the hydrophilicity of the HS in the soil in the plot of “permanent bare fallow” and by 24% higher than in the soil of the plot of “permanent corn”. In addition, changes in the hydrophilicity of HS of size-density fractions are more intense than the HS of the soil, so the change in the degree of hydrophilicity of HS of size-density fractions is an indicator of soil degradation under different agrogenic pressue.

show abstract

The experience of the complex assessment of the impact of the length of agricultural use on properties and regimes of agrochernozems of stony steppe

Cited by 7 publications

References 0 publications

The contact angle of wetting as an integral indicator of physical-chemical properties of Сhernozems of Kamennaya Steppe

The contact angle of wetting as an integral indicator of physical-chemical properties of Сhernozems of Kamennaya Steppe

Dynamics of soil formation factors and their influence on agricultural technology in the Kamennaya Steppe

Changes in the hydrophobic-hydrophilic properties of the organic matter of the chernozems of the Kamennaya Steppe

Contact Info

Product

Resources

About