Burdukovskii M.L., Timofeeva Ya.O., Golov V.I., Kiseleva I.V., Timoshinov R.V.
В журнале Eurasian Soil Science
Год: 2022 Том: 55 Номер: 12 Страницы: 1505-1513
Changes in the structural–aggregate state, acidity, and carbon stocks of dark-humus podbels (Luvic Albic Mollic Planosols (Epiloamic, Endoclayic, Aric)) during their postagrogenic development under unmanaged fallow were studied at the experimental station of the A.K. Chaika Federal Scientific Center of Agricultural Biotechnology of the Far East. Restoration of the aggregate state of the soil after its removal from agricultural use took place: the content of agronomically valuable aggregates increased and their weighted average diameter decreased in the former arable layer. In the course of vegetation restoration, soils were acidified. The most pronounced drop in pH took place in the 20-yr-old fallow soil with the appearance of woody plants. The content and stocks of carbon in the fallow soils tended to increase during the entire studied postagrogenic period. Carbon stocks in a layer of 0–25 cm reached their maximum by the 85th yr of the postagrogenic succession. However, the difference between carbon stocks in a layer of 0–50 cm in the 20- and 85- yr-old fallow soils was statistically insignificant. Bulk density of the plow layer in the cultivated soil reached 0.88 g/cm3. In the fallow soils, bulk density of the upper horizon varied within 0.67–0.79 g/cm3.
