FEATURES OF FIELD MANAGEMENT FOR SEED PRODUCTION OF GRAIN CROPS IN THE FOREST STEPPE OF KRASNOYARSK TERRITORY

Results are given from investigations into responses of grain crop varieties of different maturity groups to sowing dates, fertilizers, chemical weed and pest killers. It has been found that mid-ripening varieties sown late have a certain advantage over early-ripening varieties because of their productivity, but yield to them in the sowing qualities of seeds. It is shown that sowing dates in early-ripening varieties do not influence considerably on seed germination, but form higher productivity. Late sowing dates for crops and varieties differing in ripeness are acceptable to the extent of the coincidence with favorable environmental conditions. Seed treatment and the optimum doses of fertilizers exert positive influence on productivity and quality of seeds. Ranking of varieties according to their response to growing techniques and stability of indices can be used for evaluating the effectiveness of techniques applied in primary links of seed production.Methods for increasing productivity of grain crop varieties studied can be used, when both sowing for seeds and for production. As Krasnoyarsk Territory abounds in the contrasting soil-climatic zones with their dynamics of moisture availability, daily mean temperatures, soil difference and other factors, there appear to be sufficient reasons for developing entirely different grain crop growing techniques. Therefore, it is necessary to expand research into responses of new and promising varieties to advanced growing techniques before their zoning in order to obtain high-quality seeds during the seed production process.

зерновые культуры, сроки посева, группа спелости, средства химической защиты, удобрения, протравители, урожайность, grain crops, sowing date, maturity group, chemical weed and pest killers, fertilizers, seed protectant, productivity

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