Rationale. Direct seeding of grain crops allows to significantly increase field germination and, consequently, yield under conditions of extreme moisture deficit. In this regard, the development of direct seeding technology applied to the conditions of the Southern Urals, where periodically recurring severe droughts, is an urgent task.
Purpose of the work. Increase of grain crops yield in conditions of arid farming through the development of direct sowing technology that provides seed embedding in moistened soil layer.
Materials and methods. Statistical data on hydrothermal conditions of crop cultivation in the South Urals were collected and analyzed. Laboratory and laboratory-field experiments were planned and realized
Results. It has been established that in the South Urals there are quite often droughts, during which moistened soil layers, in which it is necessary to embed seeds, are at a depth of 8...10 cm. Traditional sowing technologies do not allow to provide seed embedding in moist soil with the condition of high field germination. On the basis of the analysis of methods of direct sowing of grain crops, the technology, assuming seed embedding in moistened soil layer, is proposed.The design of a combined seeding section consisting of a support wheel, a slotted disk, an anchor coulter and a packer wheel is developed. The design of the section provides parallelogram attachment to the frame of the seeding complex, which provides a stable depth of seed placement.Laboratory and laboratory-field experiments allowed to determine the energy characteristics of the seeding section, as well as agrotechnical and energy indicators of the seeding complex.
Practical value of the research. It was experimentally established that the application of the developed technology of direct seeding allows to increase the field germination by 21.7% in comparison with the basic technology, the yield increase is 9.2 c/ha.