CROP: Grapes, "Pamyat Dombkovskoy" variety

PRODUCT: Boron (foliar application)

YEAR:  2023

COUNTRY: Kazakhstan

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APPLICATION:

Number of variations: 4, number of replications: 4. Foliar application: 1st – at the stage of 5-7 leaves (May 16, 2023), 2nd – at the beginning of flowering (June 8, 2023), working solution consumption  – 1000 liters/hectare.

Trial plots area – 40 m², observed plots area – 10 m². Trial repetitiveness — four times.

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Trials variants: Control

Boron application: Water

Applications multiplicity: 2

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Trials variants: Boron

Boron application: 2,0 kg/ha

Applications multiplicity: 2

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Trials variants: Boron

Boron application: 2,5 kg/ha

Applications multiplicity: 2

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Trials variants: Boron

Boron application: 3,0 kg/ha

Applications multiplicity: 2

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RESULT:‍

1. Yield increase from control with NPK background ranged from 20.2% to 75.2%.
2. The increase in yield occurred due to the improvement of yield structure indicators.
3. Cluster weight increased by 11.3–34.0 g, bush productivity increased by 20.1–75%, berry weight increased by 8.3–25.0%, and the number of clusters increased by 8.3–33.3%.
4. There was no clear trend in quality indicators among the variations. The variant with a double 3 kg/ha application showed the best quality parameters (maximum dry matter content, total sugars).
5. The maximum result was achieved with a double application at a 2.5 kg/ha dose.
6. All yield increases exceeded the experimental error and were statistically significant.

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