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Description

Macro fertilizers are the nutrients that form the basis of grape growing and are of great importance for such vital processes as photosynthesis, protein and nucleic acids synthesis. However, the existing methods of fertilization are not effective enough. They are environmentally unsafe and give poor results in terms of grape productivity, which leads to both economic losses and serious environmental problems. This research work was carried out in order to study the effect of various combinations and dosages of nutrients on agrobiological and quality indicators of technical grape varieties grown in the village of Tugh (Garabagh), which is important for the viticulture of Azerbaijan. The soils of the experimental site, the local grape variety Khindogny and the introduced grape varieties Cabernet Sauvignon and Pinot black were selected as the object of the study. Experiments on the application of fertilizers were carried out in 4 variants. In all four variants of the experiment, positive results were obtained on various indicators of the studied grape varieties. It was found that the following options are the most optimal in terms of quality, yield and economic efficiency: for the Khindogny variety – N₁₂₀P₁₂₀K₁₂₀ (under the roots) + 2.5 kg/ha NPK 20:20:20 (on the leaves) – 8.5 kg/bush; for the Cabernet Sauvignon variety – N₁₂₀P₁₂₀K₁₂₀ (under the roots) + 2.5 kg/ha NPK 20:20:20 (on the leaves) – 7.7 kg/bush; for the Pinot black variety – N₁₅₀P₁₅₀K₁₅₀ (under the roots) + 3.0 kg/ha NPK 20:20:20 (on the leaves) – 7.6 kg/bush.