Shading and coloring to achieve an attractive appearance: the role and effect of the middle layer of the three-layer three-red grapefruit special bag

In the design of the three-layer three-red grapefruit special bag, the middle layer is not only the core part of the bag structure, but also the key factor that determines the appearance quality of the red grapefruit.

Selection of special shading materials

The middle layer uses a special shading material, which not only has excellent shading performance, but also can accurately control the light transmittance according to the growth needs of the red grapefruit. The selection of shading materials takes into account the characteristics of anthocyanin synthesis in the red grapefruit peel, ensuring that while shading, suitable lighting conditions are provided to promote the accumulation of anthocyanins.

Precise control of light transmittance

Light transmittance is an important factor affecting the coloring of the red grapefruit peel. The middle layer provides the best lighting environment for the red grapefruit by accurately controlling the light transmittance. The light conditions in different regions are different, and the light transmittance of the middle layer can be adjusted according to the specific situation to achieve the best coloring effect. For example, in areas with strong light, shading materials with lower light transmittance can be selected to prevent the peel from fading due to overexposure; in areas with weak light, shading materials with higher light transmittance can be selected to promote the synthesis of anthocyanins.

Promote anthocyanin synthesis

Anthocyanins are the key pigments that determine the color of red pomelo peel. The shading design of the middle layer can effectively promote the synthesis of anthocyanins, making the peel color more uniform and bright. By adjusting the transmittance, the middle layer provides the red pomelo with a suitable light intensity, avoiding the damage of anthocyanins by strong light, while ensuring that the fruit can receive enough light to promote the accumulation of pigments.

Increase commodity value

The appearance quality of red pomelo directly affects its market value. The shading and coloring function of the middle layer makes the red pomelo peel present an attractive red color, which enhances the appearance of the fruit. The uniform and bright peel color can not only attract consumers' attention, but also increase the added value of the product, making the red pomelo more competitive in the market.

Precautions for using three-layer bagging

Bagging is generally done when the horizontal diameter of the red pomelo fruit reaches 5-6 cm. The specific time can be adjusted according to local climatic conditions and fruit growth.
Bagging method: Fruit thinning is required before bagging to ensure that each fruit has enough growth space. When bagging, open the bag mouth first and carefully put the fruit into the bag to avoid damaging the fruit stalk. Tighten the bag mouth and fix it with a wire or buckle to ensure that the bag is firm.
Management after bagging: Check the bagging situation regularly, replace damaged bags in time, pay attention to the growth of the fruit, and prevent and control diseases and pests in time. The bagging can be removed about a week before picking to allow the fruit to receive natural light and further improve the appearance quality.