S.G. Kotchenko1, A.Y. Voronin2
1Station of Agrochemical Service «Tyumenskaya», Roshchinskoe sh., 2, korp. 10, Tyumen’, 625041, Russian Federation
2Station of Agrochemical Service «Ishimskaya», ul. Michurina, 21, Plodopitomnik, Ishim, 627400, Russian Federation
Summary. The article analyses the results of complete agrochemical survey of arable soils in Tyumen region over the period 1964-2015. The soil cover of arable soils is represented mainly by gray forest, chernozem and meadow soils. Weighted average indices of soil fertility over the period 1964-2015 changed insignificantly: the acidity reduced less than on 0.1 pH units (from 5.58 to 5.50), the content of mobile phosphorus increased from 47.20 mg/kg to 79.00 mg/kg, of mobile potassium reduced insignificantly from 117 mg/kg to 114 mg/kg. The organic matter content is constant at the level of 5.3%. The significant reduction in the volumes of the application of mineral fertilizers occurred in the recent decades, it decreased from the maximum 84 kg/ha (a.s.) in 1985-1990 to 35 kg/ha in 2011-2015. The amount of organic fertilizers decreased more than 10 times and reached 0.9 t/ha in 2011-2015. The balance of nutrients in the agriculture of Tyumen region is negative since 1991. At the same time the yields increased for grain to 2.27 t/ha, for potatoes – to 20.70 t/ha, for vegetables – to 31.12 t/ha, for corn – to 17.13 t/ha.
Keywords: agrochemical survey, soil acidity, mobile forms of phosphorus and potassium, soil organic matter, fertilizers.
Author Details: S.G. Kotchenko, director (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); A.Y. Voronin, director (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.).
For citation: Kotchenko S.G., Voronin A.Y. Dynamics of Fertility of Arable Soils in Tyumen Region. Dostizheniya nauki i tekhniki APK. 2016. V.30. No.7. Pp. 41-43.