Moisture regime of typical chernozems under the mown Steppe and plowland of Kursk oblast under the anomalous weather conditions of the last decades

作者：Г. С. Базыкина, Olena Boiko · 发表于：Eurasian Soil Science · 年份：2010 · DOI：10.1134/s1064229310010072 · 被引用次数：11 · 研究领域：Soil and Environmental Studies、Agricultural Productivity and Crop Improvement、Marine and environmental studies

The analysis of long-term (since 1947) data on the water content of the upper 3-m-thick layer in the Streletskaya Steppe chernozems under annual mowing showed that the weather changes during the last decades (from 1972–1973 to 2005–2006) resulted in an increase in the soil wetting depth during the fall-winter-spring period and the frequency of the percolation, a decrease in the water consumption from the 150- to 300-cm layer during the growing season, and a decrease in the water deficit in the fall. Therefore, the total water content of the steppe chernozems increased, although to a significantly lesser degree than that found for the steppe plot with a succession of woody-shrub vegetation. In a perennial fallow, the water content of the soil layer also increased. The water supply of the 0- to 160-cm layer of chernozems under winter wheat and corn underwent no significant changes.