Ethylene, calcium carbide and ethephon can ripen mangoes. The main purpose is to make the fruit mature early and have commercial value, make the maturity uniform and tidy, and promote the color change and softening of the fruit peel and pulp. Ethylene treatment can promote the color change of peel and pulp of fruits with different maturity. There are two kinds of mango ripening materials, which are introduced as follows: (1) calcium carbide ripening method calcium carbide, commonly known as calcium carbide, will produce acetylene when it meets water or humid air, and the ripening effect of acetylene is the same as that of ethylene. Only its activity is only one third of that of ethylene. Calcium carbide curing operation is simple, but the dosage can not be correctly grasped. Because calcium carbide cannot be completely dissolved after 48 hours of ripening, most users only use it by experience, and fruits are easy to be burned near calcium carbide. The method of calcium carbide ripening is to wrap the inner layer of the carton with cement paper, and then wrap the calcium carbide at the bottom of the carton with newspaper. The dosage of calcium carbide is about 200 grams and 20 kilograms of fruit. Then, put the hard ripe fruit in the box, wrap it in cement paper and seal it, so as not to leak. The upper part of the carton is covered with a quilt or cloth bag. According to different varieties, the ripening operation can be completed after 48 ~ 72 hours, and the ripening rate can reach more than 90%. This method has a stable effect and is suitable for ripening a small amount of fruits. If the quantity is large, you can use a breathable plastic cage (commonly known as Lu Xun's cage) to hold the hard ripe fruit, and put a few cement columns or wood on the ground, the size is about 12× 15cm, and the length is arbitrary. Put calcium carbide between two cement columns wrapped in newspapers, and then put the hard-cooked fruit cage on the columns, with a height of about 1 ~. Cover with quilt, cloth bag or special cover for ripening, and pay attention to the tightness of the cover, but avoid covering with plastic sheets, so as not to hinder the evaporation of water and affect the ripening effect. According to the variety and maturity, after 48 ~ 72 hours of ripening, soft ripening and commodity value can be achieved. (II) Ethylene generator for ripening Ethylene generator is an instrument developed and produced in Taiwan Province Province. When using the ethylene generator, alcohol should be used as raw material particles, and the ethylene produced after electric heating to 380℃ ~ 400℃ can be matured. When mango is ripe, the ethylene concentration should be higher than 10PPM at 20℃ and as low as 10 ppm at 33℃. Therefore, increasing the temperature can improve the sensitivity of mango to ethylene. Therefore, it is necessary to use an ethylene generator and a heater to ripen at room temperature, which is the reason. The suitable heating temperature is 38℃. Carbon dioxide is a competitive inhibitor of ethylene, and it can inhibit ethylene at high concentration, so insufficient oxygen will reduce the effect of ethylene. When mango ripens, in order to save space, it often needs a lot of accumulation, which leads to the decline of oxygen and the accumulation of carbon dioxide. Therefore, in the process of ripening, the door should be opened every 4 hours and carbon dioxide should be discharged with an exhaust fan. In the process of ripening, carbon dioxide should not exceed 10%. The height of the ripening room should be 4 ~ 5m, the bricks should be painted, but not painted, and an exhaust fan should be placed above the wall, with an area of about 5 ~ 6 ping. 15 level is used for 1 ethylene generator and 1 heater, and the area of each unit exceeds 15 level, increasing by 1. If it is a large ripening room, you need to buy 1 stacker and stow wood. The ripening process is as follows: fruit farmers put the fruits into plastic cages after picking, transport them to the freight yard, pile them on mats 4 ~ 5 stories high, and then pile them into ripening rooms with stackers, which are arranged in sequence. When ripening, add 1500CC alcohol to each ethylene generator, turn on the power supply, adjust the temperature to 380℃, and then keep the room temperature at 38 ~ 40℃ with a heater to start ripening. During ripening, the doors and windows of the ripening room are opened every 4 hours, and the indoor carbon dioxide is pumped out by an exhaust fan for about 10 ~ 15 minutes, and then the doors and windows are closed to continue ripening. The amount of ripening can reach 50000 kg each time, but attention should be paid to the control of room temperature. The suitable ripening time is 72 hours, and the fruit can be pushed out for grading packaging only after it is completely ripe. In the process of ripening, you can purchase goods every day, and each batch of fruit can be shipped after 72 hours of ripening, and it will be circulated in turn. This facility has been in operation for several years since 199 1. Its advantages are that it can ripen in large quantities, save the labor time of fruit farmers for ripening alone and reduce the production cost. After ripening, the color is beautiful, neat and uniform. The storage time can be extended by about 7 days. When it is mature, it can be sorted and packaged in a unified way, strive for the timeliness of transportation and marketing, and adjust the market supply and demand. The fruit picking period coincides with the rainy season in the south, and it can still be harvested in rainy days, which is not affected by the weather. The disadvantage is that alcohol is a tube product, and the application procedures are complicated and difficult to obtain. The above two different ripening methods are similar, but the applicable objects are different. If the daily ripening amount does not exceed 600 kg, the calcium carbide ripening method can be used; If it exceeds 600 kg, a ripening room can be built and ripened with an ethylene generator. Release time: 200 1- 10-24 Source: Institute of Information, Guangdong Academy of Agricultural Sciences.

There is also a simple method, which is also a common method at home. We usually bury the mangoes intact in a rice jar, cover them, and take them out for about a week until they are ripe.