Phosphatase activity in the surface and buried chestnut soils of the Volga-Don interfluve |
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Authors: | T E Khomutova T S Demkina N N Kashirskaya V A Demkin |
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Institution: | 1.Institute of Physicochemical and Biological Problems of Soil Science,Russian Academy of Sciences,Pushchino, Moscow oblast,Russia |
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Abstract: | The phosphatase activity (PA) was studied in the chestnut paleosols buried in 1718–1720 under the Anna Ivanovna rampart in
the southern part of the Privolzhskaya Upland and in the middle of the third millennium BC under the burial mound of the Bronze
Age on the Northern Yergeni Upland; the background analogues of these soils were also examined. The PA values in the fresh
soil samples varied from 2.5 to 37 mg of P2O5/10 g of soil per h with maximums in the A1 horizon of the surface soils and in the B1 horizon of the paleosols. The PA values
depended on the time of storage of the samples: with time, they increased by 2.6–2.9 times in the A1 horizon of the background
surface soil and decreased by 20–60% in the other soil samples. The specific distribution patterns of the PA values in the
soil profiles remained the same independently of the time of storage of the samples. Relatively small amounts of the soil
samples were sufficient for the reliable determination of the PA: 1–2 g for the A1 horizon and 3–5 g for the B1 and B2 horizons.
The time of incubation with the substrate had to be increased up to 4 h for the long-stored samples. |
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