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Orlov Roman Alexeyevich
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• Kuban State Agrarian University
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Description
Researches on non-root additional fertilizing of grapes with complex water-soluble fertilizer called Nutrivant plus have been conducted in corporation "Pobeda" in Temrjuksky area of Krasnodar territory on the implanted plantings of technical grade Rhine Riesling. In the test, the following kinds of Nutrivant plus were used: oleiferous (N0P20K33), sugar beet (N0P36K24), grapes (N0P40K25), universal (N19P19K19), grain (N6P23K35). Each mark of Nutrivant plus contained a certain set of microelements. The test consisted of six variants:1 variant - without additional fertilizing(control); 2 variant: grapes - before flowering, grapes - a growth phase of berries (a berry about a pea), oleiferous - the beginning of maturing of berries; 3 variant: universal - before flowering, universal - a growth phase of berries (a berry about a pea), oleiferous- the beginning of maturing of berries; 4 variant: grain - before flowering, grain - a growth phase of berries (a berry about a pea), oleiferous- the beginning of maturing of berries; 5 variant: Sugar beet - before flowering, a sugar beet - a growth phase of berries (a berry about a pea), a sugar beet - the beginning of maturing of berries; 6 variant: universal - before flowering, grain - a growth phase of berries (a berry about a pea), grapes - the beginning of maturing of berries. Norm of the expense of fertilizer is 3 kg/hectares. The expense of a working liquid - 700 l/hectares. The result was, that in the third, fourth and fifth variant of the test the increase in a crop from a bush happened accordingly on 7,5, 13,8 and 17,8 %. The maximum increase of a crop in the fifth variant was accompanied by increase in mass concentration of sugars in juice of berries on 0,6 g/100 см3и decrease titratable acidities for 0,6/dm3 As a result triple not root additional fertilizing of grapes plants grade Riesling with Nutrivant plus (universal - before flowering, grain - in a growth phase of berries and grape - in the beginning of maturing of berries) promoted more optimization of a water mode of leaves, increase in weight of a cluster, a crop from a bush and productivity, mass concentration of sugars and phenolic substances in juice of berries
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