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Физико-химические свойства черноземов под лиственными лесополосами

2013; Linguagem: Inglês

1996-4277

Болотов Андрей Геннадьевич, Беховых Юрий Владимирович, Сизов Евгений Геннадьевич, Поскотинова Ольга Николаевна,

Soil and Environmental Studies

The research goal was studying the effect of deciduous windbreaks on chernozem soils’ properties. Southern chernozem and leached chernozem of the Ob River plateau were studied. The research involved the change in physical and chemical properties of those soils under windbreaks’ effect. The soil properties of southern chernozem were studied under Populus balsamifera and Betula pendula, and on the fallow lands at the State Windbreak Slavgorod-Rubtsovsk. The soil properties of leached chernozem were studied at the Research Institute of Siberian Gardening under Quercus robur, Populus balsamifera, Betula pendula, and on fallows. The studies revealed the greatest humus content in top soil horizons under Betula pendula. The humus content under Quercus robur was close to that of the fallows, and under Populus balsamifera it was lower than that of the fallows. The pH under Betula pendula tends to low-acidic value. The soil pH under Populus balsamifera is low-acidic increasing down the soil profile. The soil pH under Quercus robur is low-alkaline. On the leached chernozem in forest litter horizon under Betula pendula, the greatest hydrolytic acidity of all studied sites is revealed; it decreases down the soil profile. The cation exchange capacity is greatly affected by the deciduous tree species. The greatest changes in that index as compared to fallows occur under Populus balsamifera and Quercus robur. The greatest content of calcium and magnesium in southern chernozem is revealed in fallows, and much lesser content under Populus balsamifera and Betula pendula. The degree of base saturation is very high in fallows. That index is much lesser under Betula pendula and Populus balsamifera in top soil horizons, but with the depth it increases to the values close to those of the fallows. Under tree species carbonates underlay deeper than those under fallows and they are characterized by wavy distribution.