Uvarenko K. Іnfluence of the soil density and soil humidity of the arable layer of typical heavy loam soil on the productivity of spring barley

Object - regulation of the main agrophysical parameters of the arable layer of soil for increase the productivity of spring barley under the conditions of mineral fertilizers. Purpose is to determine the influence of agrophysical parameters of arable layer of soil on the productivity of spring barley sorts of different types of intensity under the application of mineral fertilizers on the example of typical deep low-humus deep-boiling heavy-loam chernozem. Methods - analytical-bibliographic, laboratory-analytical, laboratory-model, field (small-area), mathematical-statistical, calculation. Theoretical results – it was defined statistically significant relationship between moisture, density of the arable soil layer and germination, growth, development of the root system, productivity of intensive and semi-intensive sorts of spring barley. The optimal parameters of the structure density and moisture content of typical chernozem were determined to ensure the maximum yield of the researced sorts of culture under the conditions of effect and aftereffect of mineral fertilizers. Practical results. Optimization of the main agrophysical parameters of the arable layer of typical chernozem, in particular the creation soil density at the level of 1.0-1.2 g/cm3 during pre-sowing cultivation and by the application economically justified doses of mineral fertilizers. This is the basis for improve the technology of pre-sowing tillage and will better the conditions of growth and development of the crop, increase the absorption of nutrients from the soil and provide a stable increase in productivity of intensive and semi-intensive sorts of spring barley. Novelty - It was revealed the complex influence of levels of soil moisture and compaction and identify their optimal parameters for growing different sorts of spring barley at which reached maximum yield in the conditions of soil fertilization. It was established the influence of compaction of the arable layer of the soil on the absorption, removal and use of nutrients from the soil by intensive and semi-intensive sorts of spring barley. The influence of soil compaction (taking into account humidity) on the parameters of the root system and the total biological mass of intensive and semi-intensive sorts of spring barley was established. It was improved the elements of the technology of growing different sorts of spring barley by improving the optimal density of the arable layer during pre-sowing tillage and determined economically justified doses of mineral fertilizers in the context of climate change. Degree of implementation - the results of research was tested in the production conditions of the ISSAR State Enterprise "Experimental Farm "Grakivske" Kharkiv district of Kharkiv region on the area of 1,5 hectares. A patent for a utility model "Method of increasing the efficiency of mineral fertilizers for different intensity varieties of spring barley" was obtained. The field is agriculture.