Using fertilizers in grafted grapevine seedlings production

The purpose of research is to determine the effect of foliar application of complex fertilizers on the development of grafted grape seedlings. The place of research was ARRIV&W - branch of FSBSI FRASC (Novocherkassk, Rostov Region). The results of a field experiment on the effect of foliar treatment with Terraflex Start, Microel, Raikat Start trademarks on biometric indicators and the development of the root system of grape seedlings are presented. Fertilizer application rate: Microel - 0.1 l/100 l of water, Raikat Start - 0.1 l/100 l of water, Terraflex Start - 2 kg/ha, urea (standard) - 500 g/100 l of water. The control variant was untreated. Grafted seedlings of the Denisovsky variety (Berlandieri x RipariaKober 5 BB stock) were used to set up the experiment. The scheme of the experiment included 5 variants, in 3 replications of 300 vaccinations. The share of vaccinations that took root in school varied according to the variants of the experiment from 60.4 to 69.7 %, in the control variant - 59.0 %. Ripening of the vine in the experimental variants differed significantly from the control variant, the percentage of aging varied from 66.4 to 74.0, in the control variant - 55.8 %. The use of complex fertilizers had a positive effect on the growth of shoots. The length of the shoots in the experimental variants was in the range of 105.9-141.8 cm, 9.3-46.6 % higher than that of the variant without treatment. The shoot diameter in all experimental variants exceeded the control variant. Treatment with Raykat Start and Microel fertilizers activated the development of the root system of seedlings. The total number of calcaneal roots in these variants was 14.4 and 13.9 pcs. respectively. In the control variant - 12.6 pcs., in the standard - 13.0 pcs. Foliar treatment of seedlings with Terraflex Start fertilizer did not affect the formation of roots, on average, 12 pcs. Thus, the high efficiency of foliar treatment of grape seedlings with Raikat Start fertilizer was established. The main macro- and microelements, biologically active substances contained in this preparation had a stimulating effect on the growth and development of plants.