L. V. Dymova, I. G. Samsonova, O. V. Skokova, L. Yu. Krylov
Station of Agrochemical Service “Biiskaya”, ul. Lenina, 39, s. Zonal’noe, Altaiskii krai, 659400, Russian Federation
Abstract. This study is aimed at analysing the current state and dynamics of soil fertility parameters for farmland in the southeast of the Altai Territory, the service area of the Biyskaya agrochemical station, over the period of 50 years. The total area of farmland in the Altai Territory is 2,293.0 thousand hectares. In the 70s–80s, an increase in the weighted average content of humus in soil was observed, which number eventually rose by 0.6% (from 6.4% to 7.0%). This was largely determined by a significant amount of organic fertilisers (up to 8 ton/ha). In recent years, the amount of organic fertilisers used has decreased to 0.2 ton/ha, which, in turn, has led to a decrease in the weighted average content of humus by 0.4%. The weighted average value of acidity (pH(KCl)) was declining throughout the agrochemical survey, having decreased by 0.4 pH units compared to the baseline by the seventh cycle (2003–2016). Currently, 208.9 thousand hectares of moderately and highly acidic soils (20.7% of arable land) in the southeast of the Altai Territory require immediate liming. Within the period from 1965 to 2016, the weighted average content of mobile phosphorus and potassium in soil (service area of the Biyskaya station) decreased by 22 mg/kg and 36 mg/kg, respectively. Although fertilisation in 2016 increased by 48.7 kg of active ingredient per one hectare of arable land (as compared to 2006), the balance of the main mineral nutrient elements in the agriculture of the southeast of the Altai Territory remains negative. The deficiency of such mineral elements as nitrogen, phosphorus, potassium reaches 35.2 kg/ha, 15.4 kg/ha and 29.5 kg/ha, respectively.
Keywords: soil fertility; humus; labile phosphorus; labile potassium; soil pH; Altai Territory.
Author Details: L. V. Dymova, Cand. Sc. (Agr.), director (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); I. G. Samsonova, head of division; O. V. Skokova, head of division; L. Yu. Krylov, head of laboratory.
For citation: Dymova L. V., Samsonova I. G., Skokova O. V., Krylov L. Yu. Soil Fertility Monitoring in the Southeast of the Altai Krai. Dostizheniya nauki i tekhniki APK. 2019. Vol. 33. No. 4. Pp. 46–49 (in Russ.). DOI: 10.24411/0235-2451-2019-10411.