On the level of perfection of the technology for spring wheat cultivation under forest-steppe conditions

The research objective was to reveal the influence of the intensity of technological operations, i.e. operating anthropogenous impacts on the level of perfection of cultivation of spring wheat and on its productivity in the zone of forest-steppe of Krasnoyarsk Region. The main researches were conducted during 2017-2019 on experimental fields EF "Krasnaya Polyana", Agroholding ‘Sibiryak’. Additional researches on the specification of numerical characteristics were executed on field station of Production Department of Achinsk branch of Krasnoyarsk SAU. Regression and correlation analyses of field experiment were made by usual method of the smallest areas with the creation of correlation fields. It was supposed that the regulation of the load of productive environment of biogeocenosis created by the group of applied mechanized technological operations of optimum intensity could lead to the increase of lower limit of productivity of spring wheat changing in wide range. The influence of the level of perfection of agrotechnology in the range from 25 to 75 % on the built scale was localized and exponential formula of the productivity of model variety of spring wheat was offered. The lower 25 % level of technological perfection corresponded to the combination of the factors: seeding of 5 mln seeds, site class of the environment - 53 points, the intensity of the processing - by 100 %, the application of fertilizers by 0 % and the protection of the plants by 50 %. The top 75 % level corresponded to: the seeding of 6 million seeds, site class of the environment - 75 points, the intensity of processing for 50 %, the application of fertilizers - by 100 % and the protection of plants - by 100 %. It was established that the convergence of projections and experimental values of productivity depending on sowed quantity of seeds, site class of productive environment, the intensity of machining of the soil, the application of fertilizers, the protection of plants, but without the modes of the temperature and rainfall, made 57.63 %. In considered technological system of cultivation of spring wheat on the influence on productivity of its model variety on the first place there was the processing of the soil, on the second - the protection of the plants, and on the third place - the application of the fertilizers. In the conditions of the forest-steppe the factor of productive environment was comparable to adjustable factor of application of fertilizers.