Scientific Journal of KubSAU

In the article, we have revealed the efficiency of sown using of fertilizers, the methods and the doses of additional fertilizing on different maize subspecies growing on the leached black soil of Northern Ciscaucasia which are based on studies in central part of the Kras-nodar region in 2008-2010. We have also given the scientifically-based references of increasing productiv-ity of maize

The article reveals issues concerning three years research about the rate of influence complex water soluble fertilizers in seed treatment and treatment vegetative plant in phase 3-5 and 7-8 leaves for grain yield increase. In the process of research were determined summarized water consumption and coefficient of water consumption, measuring of morphological signs, were given economical estimation of using complex water soluble fertilizers in corn grain yield increase. The research shows the efficiency of seed treatment of average corn hybrid Krasnodarskiy 377 AMV by complex water soluble fertilizer Lignohumate potassium at dose 0,5 l/t. Grain yield increase in mentioned variant was 4,4 c/ha in comparison with variant of distilled water treatment. The same grain yield increase was got by using in seed treatment the mixture of Albit, 0,05 l/t with Lignohumate potassium, 0,5 l/t. the treatment of vegetative plants in phase 3-5 leaves when were sowed non treated seed were less efficient than in phase 7-8 leaves, where grain yield increase was 4,5 c/ha. Seed treatment of Lignohumate potassium in combination with vegetative plants treatment in phase 7-8 leaves by using Megamix, Bionekskemi and Lignohumate potassium allowed to get grain yield level 80,3-80,8 c/ha

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 %