Flowers harvested from the greenhouse should be pretreated as soon as possible to maintain the quality of flowers. Preprocessing includes the following steps. 1. Post-harvest conditioning After the flower stem leaves the plant, it will appear wilting due to moisture loss. To make flowers have a good shape, they should be put into water as soon as possible after they are harvested for conditioning to prevent loss of flower moisture and cause wilting. The beginning of wilting flowers, immersed in water for about 1 hour will be able to restore normal cell swelling pressure. Conditioning containers and water should be cleaned. Where conditions permit, water containing fungicides can be used to regulate flowers, and the effect will be better. 2. Pretreatment Before packaging, storage and transportation, short-term immersion treatment of the base of the stem with a sugar-based chemical solution is called pretreatment. It can achieve these goals: The first is to improve the flowering quality and extend the flowering period; The second is to allow the buds harvested during budding to open normally; The third is to ensure open quality after transportation or storage. Pretreatment often uses sucrose and silver thiosulphate. For example, a rose can be treated with about 10% sucrose at 20°C for 4 hours. 3. Precooling Pre-cooling is to quickly remove field heat before transport or storage. For highly perishable crops, such as cut flowers, pre-cooling is necessary. The higher the temperature, the faster the decay occurs, and the lower the transpiration rate of the crop at low temperatures. Therefore, pre-cooling before packaging, storage and transportation, and removal of field heat and respiratory heat can greatly reduce the decay and wilting during transportation. The faster the product is put into the ideal storage temperature after harvest, the longer it will be stored. There are many methods for pre-cooling. The simplest is to set up a cold room at the edge of the field. The cold room is not packed with flower branches or closed boxes, so that the flower branches can dissipate heat until the desired temperature. The pre-cooling temperature is 0°C to 1°C and the relative humidity is 95% to 98%. The pre-cooling time differs depending on the type of flower, the size of the box, and the method of pre-cooling. After pre-cooling, the flowering branch should always be kept in a cool place so that the flower can maintain a constant low temperature. In the production of pre-cooling methods are: Water-cooled: let ice water through the box directly absorb the heat of the product, to achieve the purpose of cooling. It is best to add fungicide in water. Air Cooling: Allow the cold air to pass through the unsealed box to lower the temperature, and pre-cool it before sealing. This method is widely used in Israel. Ultrasound System,Ultrasound General Images,Ultrasound Imaging Device,Ic Enter Integrated Ultrasound MinFound Medical Systems Co., Ltd , https://www.minfoundmed.com