Vlasenko M.V., Kulik A.K., Salugin A.N. EVALUATION OF ECOLOGICAL CONDITION AND PRODUCTIVITY LOSSES OF ARID PASTURES ECOSYSTEMS OF SARPINSKY LOWLAND // Arid ecosystems. 2019. V. 25. № 4 (81). P. 71-81. | PDF
We monitored the pastures ecosystems of the semi-arid zone in Sarpinsky Lowland of Russia and registered some local problems. The experimental data was collected through 1999-2017. It is stated that the present agro-landscape conditions are critical. The degraded pastures account for more than 600 thousands ha (34%), more than the half of which are highly degraded. 35-40%, of the total area of the regional forage grounds (about 1870 thousands ha) are moderately overgrazed, 30-40% are highly overgrazed, and 15-20% are excluded from the agricultural management and have turned into broken sands and abandoned territories. The digression is severely high on the winter (year-round) pastures. The area of open and drift sands has increased to 20-30%. In some districts the pressure on the pastures exceeds the optimal index 5-7 times. Almost all pastures need resting periods and agricultural restoration. Desertification (salinity, erosion and deflation) is a severe problem of the region. As the result of it the productivity loss of the pastures is 1052.7 thousands hwt of feed-units per year. Agroforestry measures have a significant value for preventing of soil erosion and deflation and are considered to be the many-functional, long-term protection factor. A map of forest conditions was composed to achieve the maximal ecological- and economical result of agroforestation; it was based on the agroforestry classification which represents the natural characteristics of the territory and features of its agroforestry developing
Keywords: desertification, deflation, eroding, salinity, pastures, annual productivity loss.