SUBSTANTIATION OF METHODS OF PRESERVATION AND RESTORATION OF FERTILITY OF SALINE AND ALKALI SOILS OF NORTH KAZAKHSTAN
On the basis of the data analysis of soil-ecological conditions for gray-meadow saline soils on the irrigated lands of Northern Kazakhstan methods aimed at improving the efficiency of ecological and reclamation measures have been developed. According to the results of the studies, the optimal norms for washing the investigated irrigation area were determined. Environmental factors that characterize the risks of irrigation were identified for the rated soil layer. In order to regulate the water-salt regime of saline lands, taking into account their heat and moisture provision, a geoecological assessment of the investigated area was carried out on the basis of the study of the soils hydrothermal regime. There are considered regulation methods of the water-salt regime of saline and alkali soils in order to improve soil formation processes providing opportunities for the enhanced reproduction of soil fertility on the irrigated lands. When substantiating and developing resource-saving technologies of desalinization of saline soils there were determined optimal norms of the studied object.