The Latest Causes of Poor Strawberry Coloration and How to Solve Them

Strawberries are normally red in color, but during cultivation, poor fruit coloration very easily occurs. Although it does not affect the taste of the strawberries, the poor appearance reduces buyers' desire to purchase them and seriously lowers economic returns. So what causes poor strawberry coloration? Let's learn about it together with the editor.

I. Causes of poor coloration

1. After the fruit has fully swollen, how well it colors is closely tied to nutrient supply. When nitrogen is excessive and potassium fertilizer and boron fertilizer are lacking, the fruit will color poorly. In addition, mineral elements such as calcium, molybdenum and boron promote fruit coloration to a certain degree, and a lack of them will also hinder fruit coloration.

2. During the peak fruit-swelling period, a lack of water will also cause poor coloration of the fruit skin.

3. Strawberries grow on runners, so after fruiting the berries often come into contact with the plastic mulch and the bedding straw. Over time, because the contact surface receives no sunlight, poor coloration also occurs.

4. Fruit coloration is greatly affected by temperature, light and soil conditions. The suitable temperature for the formation of anthocyanin pigments is 20-25 degrees, and temperatures that are too high or too low are both unfavorable for its synthesis. With continuous low temperatures or insufficient light, especially when the greenhouse temperature is below 5 degrees, green-tipped fruit is very likely to occur; when light is insufficient, the sugar content of the berries is low, or phosphorus and potassium fertilizers are insufficient, physiological white fruit will be caused, with all or part of the fruit surface appearing white or pale yellowish-white. Around the white fruit there is also a ring of red, and the fruit has a bland flavor, soft texture, and pink or white flesh.

5. Fruit color is also related to endogenous hormones, and excessive use of hormones also easily forms green-topped fruit.

II. Solutions

First, regulate the temperature as much as possible and improve the light conditions inside the greenhouse. When planting, apply enough organic fertilizer as base fertilizer, plant at a reasonable density, and prevent shading between Jiamusi plants. Keep the greenhouse film well bridged and prevent water droplets and dust from adhering to the film surface. Silver-gray film, aluminum foil or reflective screens can be laid on the ground to increase the light intensity between plants. During fruit coloration, spraying fulvic acid fertilizers and potassium, calcium, molybdenum and boron fertilizers can promote fruit coloration and also effectively prevent premature leaf senescence. During the fruit-swelling period, promptly remove the leaves that affect coloration, which can increase coloration and prevent the fruiting branches from affecting coloration due to overlapping and squeezing. About three days into the color-change period of strawberries, the strawberries can be turned over so that the side previously close to the ground can also be exposed to sunlight.

The above is an introduction to the causes of poor strawberry coloration and the solutions. We hope it can help you. To learn more related knowledge, please stay tuned to us.