Physical properties of ordinary chernozems in steppe landscapes adjacent to forestsстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The spatial changes in the ecological conditions of the humus formation; the humus content and reserves and its fractional-group composition and amphiphilic properties; and the structure, density, and water absorption coefficient of ordinary chernozems were studied on nine key plots at distances of 34 and 2 km from two forest massifs of different sizes-the Buzuluk Bor (111 000 ha) and a small birch grove (25 ha)-in the steppe zone of the Cis-Ural region. With an increase in the distance from the forests, the soil humus reserves decrease, the C-ha/C-fa ratio becomes larger, and the portion of hydrophilic and amphiphilicneutral fractions in the soil organic matter increases. In the same direction, the structure coefficient decreases (from 2.5-3.7 to 1.5-2.2), the soil density gradually increases, and the water permeability decreases and remains within the optimal values range.