First, work before storage 1. Production of high quality pear fruit. Huang Guan Li Yuan should apply organic manure. During the growing season, the amount of nitrogen fertilizer should be controlled. Balanced fertilization should be performed throughout the year. Nitrogen:phosphorus:potassium is 1:0.5:1. Nitrogen fertilizer should be controlled at the later stage of growth to control irrigation and the yield should be controlled at 5000-. 6000 pounds, the average weight of 250-300 grams. The pear fruit thus produced is not only of high quality but also resistant to storage. Partial application of nitrogen fertilizer, excessive irrigation of fruit, although the fruit is large, but the fruit is low in sugar content, water content is large, intolerant of storage. 2. Using fruit bagging technology to prevent and control pests and diseases, reduce the rate of pests and diseases. During the growing season, we must do a good job of prevention and control of pests and diseases to prevent the occurrence of fruit diseases such as pear ringworm disease and pear black spot disease. At the same time, we must prevent and control pests such as pear pests, pear yellow beak, and stink bugs. Prevent pests from entering the store and causing rotting during storage. 3. Harvesting in proper period to prevent mechanical injury and storage in grades. The suitable harvest period of Huangguanli is from August 10th to August 20th. Harvesting too early or too late is not conducive to fruit storage. Harvesting should be carried out lightly, lightly, lightly, and lightly to prevent mechanical injury. After harvesting, the grading and packing are timely, the inner layer is used for packaging paper, and the outer layer is used for foaming net, which can effectively buffer the collision. The packaging must use good quality refrigerators. Second, cold storage management technology 1. Do a good job in advance clean storage, disinfection, rodent control and other work. Pre-cooled to 8°C-10°C. 2. Precooling before storage. Since Huang Guanli is harvested during the middle of August, the temperature is very high, so the fruits must be pre-cooled before entering the cold storage to prevent the chills of the fruit from entering the store. After harvesting and packing on the same day, pre-cooling is performed at night and field heat is eliminated. The storage is carried out the next morning. 3. Temperature and humidity management after storage. Huang crown pear storage temperature is 8 °C -10 °C, when the storage of the fruit box to be neat, generally can be 垛 2.5 meters high, 2 meters wide, leaving 5-10 cm between the fruit box gap, two Leave about 30 centimeters of passage for ventilation. After the warehousing is completed, the temperature can be reduced to 5°C, and the humidity should be controlled at 90%-95%. The ventilation should be performed once every 2-3 days for about half an hour. Generally can be stored until March and April of the following year. Third, other storage methods 1. The use of cold storage and plastic wrap technology, can further extend the storage period of Huangguan pear, and even can be stored until the following year in June, but the relative cost is high. 2. The use of air-conditioned storage. The modified atmosphere is based on refrigerating, adjusting the concentration ratio of oxygen and carbon dioxide in a relatively closed environment to achieve the effect of controlling the respiratory physiology of the fruit, so the preservation period is longer. Due to its high cost, the current development is not yet many, but it is the direction of future storage of fresh fruit. It is important to note that the time taken to enter the air-conditioning warehouse after harvesting should be as short as possible. During the storage, the number of open doors should be reduced as much as possible, and the pears in the store should be filled with high loads to shorten the time for the pear fruit to enter the atmosphere.
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