Nedotsyuk O. Soil-ecological conditions and ways of improving soil fertility of the seaside part of Krasnoznamyanska irrigation system

Object - the processes, that forms the modern soil-ecological state of land plot in seaside part of the Krasnoznamenska irrigation system (KIS), the directions of its evolution and the ways of soils fertility-improving. Purpose - identification the current state of the modern soil-ecological state land plot in seaside part of the KIS, determination he directions of its evolution and the ways of its rational use, protection and soils fertility improving. Methods - the nature and laboratory-analytical, methods variation, cross-correlation and dispersible analyses. The cartographic operations were conducted with methods of the geographic information systems. Theoretical results - the theoretical approach to address the issue of the scientific basis of the probability of irrigation renovation and expansion to projected irrigated areas of the coastal KIS are based on the study of the patterns of soil processes dued of irrigation water the I-class quality; reasonable forecast trends of soil evolution KIS and integrated system of measures to improve soil differentiated depending on the parameters of soil indicators of ecological status. Practical results - the system of evaluation the soil-ecological state of irrigated soils were improved by agrophysical and physical and chemical indexes and their parameters; created the maps of complex estimation the lands of seaside part of the KIS with determination of areas with the good, satisfactory and unsatisfactory state; prognosis map of directions the evolution of the soil-ecological state of lands were made, it is envisages the increase of areas with the good state to 2015; the integral system of organizational, agromelioration and agrotechnical events offers on the improvement of the soil-ecological state and fertility-improving of soils. Novelty - the improved system of estimation the soil-ecological state of irrigated soils offers with the use of GIS technologies, that makes possible to increase exactness and promote the operationability of researches the soils state of the irrigation systems; conformities the laws of changes morphological, agrophysical, salt, physical and chemical, agrochemical parameters of soils of silt-loam grain-size distribution of different degree of hydromorfism of seaside part of KIS are set under influence of irrigation waters of І- st class of quality and removed out from irrigation; using the proposed system of indexes were made a complex estimation of the soil-ecological state, areas are certain with the good, satisfactory and unsatisfactory state; the prognosis of directions the evolution of the soil-ecological state of soils is worked out, it is envisages the increase of areas with the good state to 2015 that will make possible to extend the areas of irrigation to projected; the integral system of events offers on the improvement of the soil-ecological state and fertility-improving of the soils differentiated depending on the set parameters of indexes of the soil-ecological state of seashore part of the Krasnoznamenska irrigation system. Degree of application - the results of dissertation work are used for creation the recommendations "Rational use of lands of seaside part of KIS". The results are inculcated in 2012 in the Kakhovska hydrogeology-ameliorative expedition of State agency for water resources of Ukraine on an area 70 thousands ha. The field is agriculture.