Articles

Orchads: post-harvest treatment. P.1.

27 September 2023

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🧑‍🌾 It’s time for farmers to think about POST-HARVEST TREATMENT of their orchards.

🍂 From the moment of harvest until the complete shedding of leaves or the first 🌡️ night frosts (up to -4°C, -5°C), it’s important to make treatment with special elements. Assimilates are transported to the perennial wood from healthy, undamaged by frost and diseases, leaves.

➡️ Such orchard treatment serves several purposes:

1️⃣ Compensate for the nutrient deficits expended by the plant for crop formation.

2️⃣ Accumulate nutrients for the next harvest.

3️⃣ Prepare the plant for winter.

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⚠️ Pay special attention to these elements:

NITROGEN – important in this period as well (focus more on soil application). At this time, it’s advisable to apply up to 30% of the total annual Nitrogen application, as the plant will utilize the reserves for flowering in the next year. Applying calcium nitrate is sensible, combined with fertigation at temperatures not lower than 10–15°C. The Nitrogen accumulated in the woody shoots influences the development of next season’s buds.

POTASSIUM – both soil and foliar application are effective. It enhances bark condition, sugar accumulation for wintering, and regulates the plant’s water balance – increasing its resistance to low temperatures.

PHOSPHORUS – both soil and foliar application are advisable. Autumn application is needed for root development and to break the dormancy next year.

‼️ BUT don’t forget about micronutrients:

ZINC – focus on foliar application. It’s necessary for further flowering and fruit setting, aids in synthesizing auxins for cell division for uniform bud break and fruit setting, maintenance, and size. It increases plant frost resistance. It promotes normal leaf and fruit growth in the next season.

BORON – focus on foliar application. It’s essential for future flowering and fruit setting, promoting healthy floral parts, pollen tubes, and Calcium absorption. It participates in forming cell structures, tissue differentiation, providing strength. It strengthens cell walls by facilitating the flow of assimilates from the perennial wood.

MOLYBDENUM – influences phosphorus metabolism in plants, increases bound water content, and tissue’s water-holding capacity, which contributes to better winter and drought resistance of trees in winter and early spring, particularly protecting against early spring burns.

COBALT – acts as a catalyst in enzymatic reactions, positively affecting protein formation. It influences the productivity of plants in the next vegetative period.

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📚 Theoretical information is acquired – now, it’s time for practical solutions!

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