Apple sweetness is a key factor that appeals to consumers. To enhance the natural sweetness and appearance of apples, several effective methods can be applied. Here's a detailed guide on how to achieve better results: (1) Use reflective film. In early August, place aluminum foil plastic around the tree canopy, about 1 meter high. This reflective material increases light exposure, helping to color the inner parts of the tree and the lower sections of the fruit. Trees treated with this method showed a 71% red or half-red fruit ratio, compared to just 40% in untreated trees. (2) Apply bacterial agents. Using a sweetening agent not only boosts sugar content but also ensures even coloration and maintains the fruit’s fresh, green quality. It helps in achieving a more uniform and appealing look. (3) Proper fertilization. Red Fuji apples are high in potassium. Applying extra potassium fertilizer after July can increase the coloring index by 24.4% and raise the sugar content by 2.4%. This leads to better quality and more marketable fruits. (4) Fruit bagging. Bagging the apples improves both color and freshness. It is recommended to use double-layer waxed paper bags that offer good shading, breathability, and water resistance. Bags should be closed before harvest and removed 15–20 days before picking. Spraying water 1–2 times during this period can further enhance color development. (5) Leaf removal, fruit twisting, and branch support. When the fruit is exposed to sunlight, remove any leaves that block light from reaching the fruit. For uncolored areas or fruit surfaces that are in contact with each other, twist them towards the sun at the right time. Install supports like poles or hanging sticks in the later stages of growth to prevent branches from overlapping or sagging, which can affect color development. (6) Place reflective film under the tree. After removing leaves and twisting fruits, immediately install reflective film beneath the tree. This helps improve the color of the lower parts and the "pimple" areas, increasing the overall red fruit percentage. For more information or detailed instructions, visit our website or consult with an expert. Enhancing apple sweetness and appearance is a combination of science and care—leading to better yields and higher consumer satisfaction.
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