THE mechanisms of THE development of corn hybrids depending on the terms of planting and TMTD-PLUS disinfectant IN THE ZONE of sufficient moisture of central CISCAUCASIA
There was given a review of the results of the study in the conditions of sufficient moisture of Central Ciscaucasia, the influence of planting terms and presowing seed treatment by the drug called "TMTD-plus", containing Krezatsin growth stimulator in its composition, on the development of corn hybrids of different maturity groups of the selection of Krasnodar Research Institute of Agriculture named after P.P. Lukyanenko (Ross 199, Ross 299, Krasnodar 382 and Krasnodar 410) and the All-Russian Research Institute of Corn (Mashuk 170, Newton, RIC 345 and Eric), as well as middle- maturity population Rossiyskaya 1. The studies were conducted in accordance with the thematic plan of scientific researches of the chair of crop and forage production of the Stavropol State Agrarian University. The soil surface of the experimental station of StavrGAU was presented as leached black soil. The technology of growing of maize on the experimental plot corresponds to the standard one for the present area and cultivar. The predecessor is winter wheat. Sowing was performed in three terms. The first (early) sowing term was carried out at t = + 7... +8 ° C. The second (recommended) - when t = + 10... + 12 ° C. The third (later) sowing time was carried out at t = +15 ° C. The plant density: early-maturing hybrids - 70 thousand pieces/ha, is mid-maturing ones - 60 thousand pieces/ha, middle-ripe - 50 thousand piece/ha, middle-later ones - 45 thousand pieces/ha. The scheme is single-row, with spacing of 70 cm. The application of the studied drug TMTD-plus helped to reduce the growing season of maize plants for one - four days. Thus, changing the sowing terms of maize hybrids and populations, we can largely control the development of plants changing the length of the growing season to two weeks and form a harvesting conveyor, thereby reducing the intensity of field work