Abstract
For the first time in the soil and climatic conditions of the Astrakhan region, a comparative study of biometric indicators, yield, productivity coefficient of 8 apple varieties grafted on a medium-sized stock 54-118 was carried out. It was found that the highest crown parameters were characteristic of the Gala Kub variety (10 m3 crown volume and 7.5 m2 crown projection area), the smallest - the Prikubanskoe, Lambourne and Vainspur varieties (2.3 ... 3.0 m3 and 3.2 ... 3.3 m2, respectively), which ensures denser placement of trees of these varieties in the garden. In terms of productivity, the varieties Pamyat Esaulu, Prikubanskoe, Vainspur, Zolotaya Korona, Renet Kubansky (25.8 ... 32.8 kg / village or 25.8 ... 32.8 t / ha) stood out. The Prikubanskoe variety (9.60 kg / m2, 13.08 kg / m3, 0.62 kg / cm2, respectively) was distinguished by the maximum productivity (kg) per unit of projection area and crown volume, area of the transverse stem. High coefficients of productivity per unit area of the cross-section of the trunk (0.49 ... 0.54 kg / cm2) were found in varieties Vainspur, Pamyat Esaulu and Renet Kubansky.
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