Biota and Environment of Natural Areas

Burdukovskii M.L., Perepelkina P.A.

Agroecological state of soils and vegetation recovery in fallow ecosystems

Year: 2022, Number: 2, Pages: 28-36

We studied changes in the vegetation recovery and some agrochemical properties of soils during their postagrogenic evolution. The studies were conducted in the Blagoveshchensky District (Amur Oblast) on abandoned agricultural fields (5, 10, 20 years after abandonment). We used a lot in the nearby native forest as a reference site. The families Artemisia and Poaceae formed the plant community basis in the abandoned land. The plant phytomass reserves increased along with the recovery of vegetation. The studied fallow soil was medium acidic. There were no significant differences in the pH values in the fallow soils of different ages. An increase in the content of humus by 17% in the upper arable layer was detected in the 20-year-old fallow soils compared to 5-year-olds. The mobile forms of phosphorus content in the fallow soils was very low. The content of mobile forms of potassium reduced from increased to average levels along with the length of the postagrogenic period. Humus content, carbon stock, mobile forms of phosphorus and potassium in the upper part of the fallow soils profile were significantly lower than in the reference site.

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