Popova A.D., Semal V.A., Brikmans A.V., Nesterova O.V., Kolesnikova Yu.A., Bovsun M.A.
Вестник Алтайского государственного аграрного университета 2019; (6 (176)): 57 - 63
For the first time for agricultural soils in the south of the Primorskiy Region (Russia), the influence of bio-charcoal (biochar) applied in soil is studied by the example of Endoargic Anthrosols. The biochar was made from wood residues of birch ( Betula alba ) and obtained by pyrolysis at a temperature of 360-380°C. Different rates of biochar application (1 kg m2 (10 t ha) and 3 kg m2 (30 t ha)) in soils depending on the presence of drainage system were studied. The physical properties of the soil: particle-size distribution, dispersion coefficient according to Kachinskiy, aggregation degree according to Baver and Rhoades, and structural factor according to Vadyunina were studied. It was revealed that the surface horizons of agrosoils of all variants had heavy particle size distribution and had high content of coarse and fine dust fractions. When any rate of biochar is applied, no changes in the particle-size distribution occur. The long-term effect of biochar has increased the amount of physical sand in a drainless system. On the second year, biochar reduces the dispersion coefficient, improves the microstructure of the soil regardless biochar application rate and the presence of a drainage system. The degree of soil aggregation is improved with the use of biochar in all variants of the experiment. The soil structure factor increases on the first year of biochar application in all rates and the presence or absence of drainage. The aftereffect of biochar on the second year lowers the structural factor both spatially and chronologically. It is planned to obtain chronological and spatial data on soil hydro-physical parameters and to study the effect of biochar application on the parameters of the physical properties of agrosoils in order to improve land use.
