The natural flowering period of peony is in the middle or late April. The natural flowering period of peony is in late April or early May. If peony and peony are bloomed in the summer (mid-May to late August), the traditional technique is to peony before germination. The seedlings of peony plants are taken from the field, stored in cold storage at low temperature, and then taken out at a proper time so that they will bloom in the artificial climate room on the date of the scheduled flowering period. Although this method can make peony and peony bloom at the same time, there is a big gap between the flowering quality and the natural flowering period. The flowering rate is low, the flower color is light, the flowers are small, the petals are few, and the leaves are small and dilute. In the middle and late April of April 2006, researchers from the Mudan Research Institute in Heze City carefully prepared the peony and peony plants to be put in the pot (Peach or Pingtao period) from the field and put them in the cold storage. Taken out at a proper time, the flowering period lasts until late July, and the flowering quality can be completely comparable to natural flowering in Daejeon.
Variety selection
The selected varieties of cold storage of peony and peony potted plants should be plant type erect, branches compact, flower straight up or side open, flowers dignified, colorful, pure, small, medium-sized round leaves or small, medium-sized long leaves, with thick and waxy leaves Quality is good, if the leaves are large and thin, then after leaving the store, there will be wilting and sagging due to excessive water loss due to transpiration. In addition, the root system should be shallow, short, fine and dense, and the plant age is 3 to 5 years. 8 flowers above. Appropriate peony varieties are: 'Jingyu', 'Wujin Yaohui', 'Purple Erqiao', 'Big Brown Violet', 'Silver Red Clever Pair', 'Lu Hehong', '18th', 'Flower Butterfly' , 'King', 'Sun Moon Brocade', 'Island Brocade', 'Big Brown Purple', 'Fu Gui Man Tang', 'Sheng Ge Jin', etc.; suitable varieties of peony herbs are: 'big rich', 'kind of flour', 'Hongyan Zhenghui', 'Qiaoling', 'Chunxiao', 'Qihualuo Cream', 'Liantai', 'Red Peak', etc.
Seedlings, pots
In mid- and late April, when individual flowers of the same species begin to bloom, select the plants that meet the requirements in Daejeon. When selecting the seedlings, the buds on the same plant should be of the same size, and the development stage should be in the peach or peach stage, so that they can be opened at the same time to achieve the best flowering effect.
After selecting the plants, the branches shall be tied up and tied with a string, and the elasticity shall be appropriate. Do not injure the buds and leaves, and then transplant the soil ball on the pots. In order to facilitate handling, plastic pots with better toughness should be used. The diameter of pots is 35 to 40 cm and the depth is 30 to 32 cm. The size of soil ball should be basically the same as that of flower pots. After putting in the pot, fill it with fine soil and drench it. If there are secretions or dirt on the buds or leaves, rinse them with clean water.
Cold storage
The cold storage is fumigated with chlorothalonil aerosol for 2 to 3 days in advance, and then fumigated every 15 to 20 days.
One day in advance, the temperature in the cold room was lowered to the set temperature, and the plants were placed in pots and immersed in water as soon as possible. They were put into the cold room as soon as possible, and were placed neatly and orderly, leaving a management channel. The temperature in the cold room is maintained at 2°C to 4°C, and the air humidity is maintained at about 95%. The temperature and humidity in the cold room cannot fluctuate frequently. The stable temperature and humidity are the key links for the successful cold storage of peony and peony.
After peony and peony enter the cold storage, although they are in a low-temperature environment, they will consume certain nutrients and water. Therefore, every 20 to 30 days after storage, appropriate amount of liquid fertilizer should be poured into the pot.
Outbound, transport
In the summer season, when the natural temperature is often above 30°C, transitional measures should be taken before peony and peony medicines are transported out of the cold storage. If they are moved directly from the cold storage to the natural environment, the flowers and leaves on the plants will wilt within 30 to 60 minutes. death. The transitional measures are: 2 to 3 days before the scheduled flowering period, quickly transfer the peony and peony potted plants from a cold storage at 2°C to 4°C to a cold storage at 10°C to 15°C, stop cooling at the next day, open the storage door, and make the temperature Gradually increase to 18 °C ~ 23 °C, and poured a pot of water permeable (Figure 1). The purpose of the transitional measures is to gradually weaken the physiological activities of peony and peony that have been exposed to low temperatures for a long time to adapt to the natural environment. During the transition, untie the string of planting plants, carefully inspect each pot of flowers, and thinly cut the leaves densely and damagedly. Scrub the buds, the secretions on the leaves, and the moldy layer with a wet rag. Before the storage, the leaves were sprayed with ethylene inhibitors to inhibit the production of ethylene during transportation to prolong the flowering period. Then bundle the branches again with a string, in order to avoid damage during transportation, use wrapping paper to wrap all branches.
Choose box trucks, refrigerated trucks or air-conditioned vehicles with heat preservation and moisturizing functions. During the transportation process, the interior temperature is maintained at 20°C~23°C and the humidity is maintained at about 85%.
Management during flowering
If exhibited outdoors, there must be shade facilities during flowering, the light transmission rate should be less than 40%, and the humidity should be kept above 80%. In particular, immediately after unloading from a transport vehicle, the plants should be sprayed with water once using a sprayer. After that, water should be sprayed 3 to 5 times a day according to the humidity conditions, or a micro-spraying facility should be installed to continuously spray water; if it is in an air-conditioned room Shown that the room temperature does not exceed 26 °C, you do not have to spray water every day. In the outdoor exhibition, the flowering period of each pot is 2 to 3 days; when it is exhibited indoors, the flowering period of each pot is 3 to 5 days.
The Olympic Games Ceremonial Flower Prospect
Using this cold storage technology, from June 18 to June 21, 2006, the processed peony and peony were successfully displayed at the first "Shandong Provincial Cultural Industry Expo" (Figure 2); July 17 to 19, Three times as a ceremonial flower placed; July 30, due to special ritual needs, peony peony all taken from the cold storage, cold storage stopped. Although the cold storage work was suspended due to special ritual requirements, the analysis of the cold storage and flowering effects of peony and potted peony flowers taken out on July 30 should not be problematic until cold storage lasts until August. The use of this cold storage technology for peony and peony potted plants is no different from natural flowering in Daejeon. The cost is low. No special facilities such as artificial climate chambers are required. The most important thing is that it can be stored and displayed in large quantities and is suitable for use as a ceremonial flower during the Olympic Games. The layout of indoor venues, hotels, etc., if shading, moisturizing conditions are better, can also be arranged in outdoor flower beds, important meeting places.
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