In the protected cultivation of plum trees, poor light, high humidity, and high yield often lead to lower sugar content, lighter flavor, and poor coloration of plum fruit, but long growing period, large temperature difference between day and night, and high management level improve fruit quality. Favorable conditions. By avoiding weaknesses and taking advantage of these favorable conditions, it is possible to produce anti-seasonal fruits of superior quality to open air conditions.
First, topdressing potassium fertilizer. Topdressing potassium fertilizer is beneficial to improve fruit quality. In addition to spraying 0.2% urea+0.2% potassium dihydrogen phosphate solution once every 10 days, 30 grams of urea and 30 grams of potassium dihydrogen phosphate were applied during the hard-core stage and fruit expansion stage, which is beneficial to increasing the number of fruit and improving fruit content. The amount of sugar.
Second, reasonable pruning. Only one or two prosperous shoots in the appropriate direction were kept in each extension head of the backbone, and the rest were removed. The result of rejuvenation is that the branches have grown too prosperous. Sparse fruitless branches. Appropriate short section shading tips.
Third, the string hanging sticks. First, use a 16-gauge wire to form a 22-meter grid in the shed, 1.8 meters above the ground. Use a string to pull the long fruit branch that stands down to the canopy and form an oblique branch. Adjust the long fruit branch to the missing branch space. To the wire.
Fourth, shop reflective film. Through suspending and trimming, a 0.3-0.4 m wide light-transmitting tape is left between the lines, and a 1-meter-wide aluminum foil single-layer reflective film is laid under the light-transmitting tape.
Fifth, appropriate water control. Under the premise of not affecting fruit development, appropriate control of watering will help improve the sugar content of the fruit and increase fruit flavor.
Six, protect the leaves. Protecting the leaves facilitates photosynthesis and increases nutrient accumulation and coloration.
Seven, increase the temperature difference between day and night. Fruit coloring to maturity, the daytime temperature is properly increased, the night temperature is appropriately reduced, and the temperature difference between day and night at 15°C to 18°C ​​is maintained, which promotes the accumulation of sugar and is beneficial to the improvement of fruit coloring and soluble solid content.
Eight, reduce the humidity. After the hard core period, Li used ventilation and dehumidification, subgingival furrow irrigation and hole irrigation, and appropriate measures to increase the temperature of the canopy, so as to reduce the relative humidity of the air and increase the transpiration rate of the fruit, promote the transport of sugar to the fruit, and increase the sugar content of the fruit.
Nine, appropriate harvest. When fruit is ripe, Li Guo should have the inherent color, aroma, flavor, taste and other quality characteristics of the variety. It should not be harvested prematurely. It is advisable to pick at 10 o'clock in the morning or 6 o'clock in the day, and it is not advisable to harvest at high temperatures at noon. The order of fruit picking is as follows: first, later, first, later, and later. Take it gently to prevent bruising, pinching, and stab wounds and keep the fruit powder intact. After harvesting fruit, put it in a cool and ventilated place in time and reduce the fruit temperature. Pack or container pad to prevent contamination of soft paper.
Diamond Cover Ceiling Light
Led Ceiling Light,Bedroom Ceiling Light,Diamond Cover Ceiling Light,Diamond Cover Ceiling Lamp
Hangzhou Lingjun Technology Co.,Ltd , https://www.lingjunelectrical.com