Effect of fertilization and liming on grain maize productivity in thes hort-term crop rotationons oddy-podzolic soil

Abstract

The results of the influence of doses and forms of limestone ameliorants and fertilization on the maize productivity in the Western Polissia were shown. The ameliorants application on the background of mineral fertilizers increased the indicators of the yield structure and plant survival. The highest results were obtained with the use of 1.5 dose dolomite meal by the hydrolytic acidity of: plants density before harvesting 62.4 ths. pcs/ha, plants height of 229 cm, the weight of an ear was 223 g, the grain yield from an ear was 79.7 %. The limestone ameliorants and fertilizers application also had a positive effect on the yield and pro-tein content in maize grain. According to the obtained data, it was found that the protein content in the grain increased by 1.82–2.89 % in variants with melioration on the background of N120P90K120 compared to the control, and amounted to 9.4–10.5 %. The maximum 10.5 % of the protein content was obtained by the using a 1,0 dose of dolomite meal on the background of mineral fertilization with the addition of sulfur S40 and foliar dressing of the Nutrivant Plus Cereals micronutrient fertilizer (2 kg/ha). The highest yield of 9.04 t/ha was formed by the combined use of 1.5 dose of dolomite meal by the hydrolytic acidity and the recommended rate of mineral fertilizers (N120P90K120). The increase of maize yield compared to control (without fertilizers) was 4.99 t/ha, compared to the background (N120P90K120) – 3.98 t/ha. The grain yield of maize increased by 10.3 % due to the application of sulfur fertilizer (S40) and two-time foliar fertilization with Nutrivant Plus Cereals micronutrient fertilizer (2 kg/ha). The analysis of economic efficiency showed that the cultivation of grain maize was unprofitable at the N120P90K120 application without soil liming; while when using chemical ameliorants, in particular different doses of dolomite meal, on a similar background fertilizer the maize cultivation was profitable (in the range of 6174–16024 UAH/ha) Keywords: chemical ameliorants, doses, fertilizers, yield, maize.