Published in Scientific Papers. Series B, Horticulture, Vol. LXIV, Issue 2
Written by Irina STANEVA, Vanya AKOVA, Georgi KORNOV
Studies were carried out in the period 2018-2019 in a fruit-bearing peach orchard on the territory of the Fruit-Growing Institute, Bulgaria. The influence of different fertilizer norms of Lumbreco, Agrifull and Humustim bioproducts on the yield and chemical composition of the 'Glohaven’ cultivar grafted on vegetative pad GF677 was studied. The highest yield was obtained after applying Agrifull with an average yield of 32.16 t/ha followed by Lumbreko with 29.64 t/ha. With a yield close to the control plants, the variant is fertilized with Humustim 22.42t/ha. The best results are reported by Brix of 12.7% and 12.0% were established in the variants treated with Lumbreco at all the applied rates and those with Agrifull at the rate of 1 L/da - 12.2%. Sugar content ranged from 4.7% in the untreated control to 10.44% in the variant with the application of Lumbrco soil nutrition. Peaches are rich in K, Mg, P and Ca. Imported bioproducts do not significantly affect the content of the main macro elements. The higher fertilizer norms had a positive effect on the content of N, P and Mg, and the differences with the fertilizer control for the element P and Mg were statistically proven.
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