INFILTRATION OF PRECIPITATION IN THE MOST COMMON SOILS OF THE REPUBLIC OF BELARUS DURING LONG-TERM AGRICULTURAL USE (ACCORDING TO LYSIMETRIC RESEARCH IN 1981-2012)

Abstract

The article presents data on infiltration of precipitation in the Republic of Belarus in the most common arable soils (from 1.0-1.5 meter layer) over a long-term period (1981-2012), by decades (1981-1990, 1991-2000 and 2001-2010), seasons of a year (spring, summer, autumn and winter) and years with a different degree of soil moistening (wet, optimal, slightly rainless, dry, and very dry years). It was found out that in the conditions of the equal amount of precipitation, temperature regime, the same level of mineral fertilizer application under crop rotation in arable soils of the republic the value of precipitation infiltration to a greater degree varied depending on the type and particle-size composition of soil. Its maximum value was in the sod-podzolic sandy soil (212.1 l/m2) and minimal one was stated for sod-podzolic highly cultivated soil (83.7 l/m2). In all sod-podzolic soils of different particle-size distribution and peat the value of infiltration of precipitation was higher in wet periods and ranged from 101.8 l / m2 (peat) or 109.3 l/m2 (loamy) up to 262.8 ll/m2 (sandy soil) with the maximum infiltration in spring, then in winter, and after that in autumn and summer.