INFLUENCE OF UNCONVENTIONAL FERTILIZERS ON GROWTH AND YIELDING CAPACITY OF CORN
Effect of unconventional fertilizers (zeolite, distillery stillage, potassium humate, cerium sulfate, sodium selenite, Zeba) on plants growth and corn yielding capacity was studied on leached chernozem of Siltanuk height in 2010 and 2012. The most positive effect on plants growth in height had a double dose of NPK - 2,84 m against 2,72 m for a single; of two zeolite doses - 2,5 and 5.0 t/ha had some advantage had double dose - 2,19 m: distillery stillage both individually and in combination with lime 3 t/ha and N <sub>45</sub>R <sub>45</sub>K <sub>45</sub> for 0,17-0,22 m exceeded control; similar effect had stimulants, the best were potassium humate and Zeba. All studied fertilizers contributed greater accumulation of wet and dry biomass compared with the control. Among themselves they differed as well as plant height that is quite natural, since biomass formation occurs simultaneously with growth processes. The greatest quantity of dry biomass was recorded in the case of double dose of NPK - 17,4 t/ha, but 16,0-16,4 t/ha - the variants with biostimulants. The control grain yield 6.0 t/ha at fertilized variants was obtained 0,5-4,4 t/ha more. At an average for 3 years the highest harvest - 10,4 t/ha - was obtained at double dose of NPK, the poorest yield (6,5-6,8 t/ha) was obtained when zeolite fertilization. Significant increase in yield was obtained by using distillery stillage individually (1,3 t/ha), in combination with lime (1,5 t/ha) and with N <sub>45</sub>R <sub>45</sub>K <sub>45</sub> (3,8 t/ha). Grain yield increase in variants with biostimulants were almost identical (3,5-3,7 t/ha); the best were cerium sulfate and sodium selenite. Studied fertilizers had significant positive effect on yielding capacity of corn by-products - yield increases ranged from 1,2 to 6,1 t/ha for the control yield of 16,6 t/ha.