Study of the effect of irrigation on anti-deflation stability of Steppe soils in Ukraine

UDC 631.425.5(477.7)

O. Pismenniy

Due to the fact that Mykolaiv region, especially its southern part belongs to the zone of risky agriculture in dry conditions, the production of agricultural products is completely dependent on solving the problem of irrigation at the farmland. The aim of this research was, in the conditions of this situation to determine the impact of irrigation on anti-deflation stability (the wind resistant soil) southern black soil and dark chestnut soils. By analyzing the works of local and foreign authors it was found that the essential factors forming anti-deflation stability of soils are indicators of their structure, mechanical strength of soil aggregates, soil moisture, and content in soil humus and fractions <0.001 mm (according to particle size analysis) and the presence of cations: Na+, Ca2+ і Mg2+. Our research cause of irrigation the content of aggregates increased > 1mm in dark chestnut soils and anti-deflation stability southern black soils. The content of exchange Na 4% contributes to the anti-deflation stability dark chestnut soils. Increasing positive temperatures in winter-spring period influences on the increasing of content-dangerous deflationary fraction < 0,25 mm in the researched soils, what can lead to more rapid collapse and blowing by strong winds.
Irrigation (uncontrolled) Ukraine steppe soils with high water salinity can lead to negative consequences: increased groundwater, alkalinity secondary structure and deterioration of irrigated soils.

Key words: structure, soil, anti-deflation stability, irrigation.

Studies of the effect of irrigation on anti-deflation stability of soils Steppe in Ukraine.

Issue 1(88). 2016