Promote apple coloring techniques

The apple fruit can only be colored by the direct sunlight, and the fruit has the distinction between the branch fruit and the inner pod fruit and the yin and yang face of the fruit, which causes uniform coloration between the fruit and the different parts of the fruit itself. Whether the color of the fruit is uniform and whether the color is bright and beautiful is one of the important criteria for evaluating the quality of apple products. Therefore, it is necessary to adopt certain technological measures in the later stages of apple production to urge Apple to receive as much sunlight as possible, to make it look good and fast, and to increase quality and increase income.

First, the picking time of leaf picking is generally about 30 days before harvesting. Bagging apples are picked one week before picking the bag. When the leaves are removed, the leaves in the range of 5 to 10 cm near the fruit stage (including the rosette leaves of the fruit stage) are first removed. After 10 days, the upright branches, the long branches, and the dense branches of the inner part of the tree crown are carefully removed, and the periphery is cut thinly. Dense new shoots. Remove leaves to retain the petiole, reduce the wound to prevent water loss. The amount of leaf removed from the whole tree should be controlled within the range of 14% to 30%. The leaves in the lower part of the shoot should be removed as much as possible, and the leaves in the upper part and the lower part of the shoot should be removed, the robust functional leaves should be kept, and the old leaves of diseased leaves should be removed. By picking up the leaves, the lighting conditions in various parts of the canopy are effectively improved, the light transmittance of the trees is significantly increased, and the fruits of different parts are evenly colored.

Second, the fruit was picked 5-6 days after the leaves were picked and the fruit was gently transferred, and the fruits were transferred to the positive side. If there is still a small amount of uncolored material, it will be slightly reversed after 5-6 days so that it can be fully and evenly colored. If it is not easy to turn in the event of a free hanging dripping, you can turn it in a good direction and fix it with thin transparent tape. When it is harvested, remove the tape. In this way, you can receive a good coloring effect without affecting the appearance. If it is a double fruit or an adjoining fruit, when the fruit is transferred, it is necessary to hold one fruit in one hand and turn it in the opposite direction, turning from the dark side to the dark side. When the fruit is transferred, it should be turned in the same direction, otherwise it will turn and the fruit handle will fall off more easily. The specific time of fruit transfer should be appropriate when the fruit surface temperature starts to fall, and it should be conducted after 3-4 pm in sunny days, and cloudy days can be conducted throughout the day. Through the transfer of fruit, the shaded fruit can be colored the same as the surface of the sun, so that the whole fruit can be colored uniformly, fully and vividly.

Third, shop reflective film Before the fruit coloring to harvest, in the tree disk and the outer edge of the crown projection, laying reflective film. Around the membrane is fixed with bricks, tiles, ropes and nails. In order to increase the reflective area and the cleanliness of the retroreflective film after the rain, it is not appropriate to use soil pressure film. When laying the film, do not pull too tightly to prevent the temperature from falling. The cold shrinkage of the reflective film causes the film to tear, affecting the reflective effect and the service life. After laying the film, it is necessary to regularly clean the leaves and dust on the film surface to maintain the reflective effect of the film surface. If the branches and leaves are too dense, the effect of film deposition will be reduced. Before the film is applied, secondary picking should be performed to increase the light transmittance, but the amount of picking leaves should not exceed 30-50%. Before fruit harvesting, the reflective film is put away, washed with clean water, and properly stored in a room without corrosion.

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