Problem of deficiency of water in Steppe

Abstract

The purpose. Assessment of urgency of deficiency of water in Steppe. Methods. Orders of meteorological observations for weather stations of the country are used. Results. Record-keepings show that in days with a heat (30°C and above) and windy weather evaporation rate of water from soil on fields of experimental station attains 3 – 5 and even 7 mm for a day. Conclusions. One of the priority directions of development of provisions of withstanding to losses of moisture from soil is the maximum weakening rate of ground stratum of air and assistance in rising level of its relative humidity for formation of more favorable microclimate for sowings of cultivated plants. Evapotranspiration rate of agricultural plants can be reduced essentially at condition when ground stratum of air will have a higher level of relative humidity and lower wind speed than traditional one for the region (for the majority of kinds of plants speed of air in range of 1 – 3 m/s is optimum).