N.A. Gradoboyeva, V.V. Elizaryev, N.V. Sireneva
Station of Agrochemical Service «Hakasskaya», Khakasskaya, 25, Abakan, 655017, Russian Federation
Summary. The analysis of data of agrochemical inspection of arable lands in the Republic of Khakassia was carried out in 1964-2015. Annually it was studied 16-20 thousand of soil samples; each of them was made from 20-40 spot samples from the arable horizon (0-20 cm) from the area up to 20 hectares. Content of organic matter in arable soils of the republic for the studied period was rather stable and corresponded to the average degree of provision over all cycles. The largest weighted-mean content of humus was registered in soils of Tashtyp district (8.3%), the least one – in the soils of the Altai area (3.1%). As of today the decrease in provision of arable soils with mobile phosphorus 1.5 times is noted: from 27.8 mg/kg in the first cycle of inspection to 17.8 mg/kg in the eighth cycle. This decrease is attached to the negative balance of phosphorus in agriculture. The content of exchange potassium in arable soils of Khakassia during supervision did not change significantly and it corresponds to the increased level. Fluctuations of this index over the inspection were from 9.3 to 40.9 mg/kg. In the dynamics of soil acidity of the arable land for all cycles of agrochemical inspection there were no essential changes. The dosage rate of gamma radiation fluctuated from 8.0 to 13.0 mcR/h that did not exceed natural values. The content of salts of heavy metals in all surveyed soils is much lower than maximum permissible concentration and approximate permissible concentration. Negative tendencies of decrease in sulfur and main micronutrients contents were outlined.
Keywords: monitoring of fertility, agrochemical inspection, arable land, humus, exchange potassium, mobile phosphorus, micronutrients, acidity level, heavy metals, balance of nutrients.
Author Details: N.A. Gradoboyeva, deputy director (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); V.V. Elizaryev, head of division; N.V. Sireneva, head of laboratory.
For citation: Gradoboyeva N.A., Elizaryev V.V., Sireneva N.V. Monitoring of Soil Fertility of Arable Lands in the Republic of Khakassia. Dostizheniya nauki i tekhniki APK. 2016. V.30. No. 7. Pp. 44-47 (in Russ.).