Scientific Journal of KubSAU

The research about effectiveness of ammonium nitrate with sowing and in phase of corn 5-6 leaves and row spacing cultivation before straw mulching was done in 2011-2013. The scheme of trial included the variants with straw mulching and without it. The variants without fertilizers and with small doses of them on background without mulching gave higher yield of cobs milk maturity then with mulching. But variants with maximum fertilizers (with sowing N30 and in phase of corn 5-6 leaves N30) gave maximum yield of cobs milk maturity 16,4 t/ha that is higher then similar variant without mulching for 1,7 t/ha. These results were confirmed by analysis of characters of growth and development of corn plants, productivity, and economic effectiveness. Therefore, net profit on variant with fertilizers with sowing N30 and additional fertilizing N30 on background of straw mulching increased for 75490 rubles for 1 ha in comparison with similar variant without mulching. The profitability on the best variant was 335 %

The article reveals issues concerning the experiments on application of complex water-soluble fertilizer and straw mulching of row-spacing in sweet corn hybrid named Krasnodarskiy 280 CV growing management and the yield of milky ripeness. We have discovered that straw mulching in combination with complex water-soluble fertilizer named Vermisol used in 5-6 leaves, reduced evaporation and tended to moisture accumulation in soil what increased yield of ears for 0,6-1,7 t/ha. The lowest water-absorbing capacity in root-inhabited layer of soil (0-0,6 m) were 28,5 % from dry weight of soil in years of experiment. Registration of sum of precipitations in critical for corn period (in third decade of June and first decade of July) was in tolerable level. The best conditions of precipitation were in 2013, when in June and July the sum was 143 mm, and humidity of the air was in optimum level – 70 %. The temperature of the soil in 0-0,1 m layer in the day of mulching was the same as in the layer 0-0,05 m, tin increase for 5 0C in variants without mulching. The lower amplitude of temperature of the soil in vegetation period since the phase of 10-11 leaves had good influence for yield of milk maturity ears