First, suitable storage conditions; Toona sinensis stems and leaves very fresh, high water content, physiological metabolism, post-harvest storage and transportation of water loss is easy to wilt. Leaf shedding and rot are the main problems. Under low temperature conditions of 0°C, leaf loss can be significantly reduced, or the relative humidity is low, and the leaf shedding rate is also significantly reduced. Therefore, the storage temperature of camphor is 0°C and the relative humidity is 80%-85%. When storing, small plastic films should be used for air conditioning.
Second, the variety and harvest; Hong 分为 according to the color is divided into purple 椿 and green 椿. The purple buds are purple-brown and suitable for storage. The green pods are green and the quality is slightly poor. The storage value is not high, but it is resistant to lower temperatures. The harvest time of Toona sinensis should be in mid-to-late April, and it can be harvested twice. The main buds were harvested first, and the lateral buds were harvested, with an interval of 10-15 days between them. Harvested in the morning, it is not easy to lose water and wilting after harvest. For storing the citron, it is best to harvest the main bud. When harvesting, shoots will fall from the base of the twigs, and do not injure buds and leaves.
Third, the storage method
1. Indoor storage; choose a cool, moist, ventilated room, first sprinkle water on the ground, and then spread on a layer of mat; then spread the toddle buds on the mat, about 10 cm thick, covered with wet grass or film, Generally can be stored for 5-7 days, but pay attention to ventilation and humidity. Do not stack and sprinkle water on the buds to prevent them from deteriorating by heat, causing the leaves to fall off and rot.
2. Dip the stems for storage; arrange the bases of the toona sinensis buds neatly and bundle them into small platters, put them in shallow pans, add about 3-4 cm deep water for a day and night, and put them in baskets or cartons in a cool, ventilated place and moisturize them. Can be stored for a short period of time.
3. Cold storage; selection of buds thick, disease-free camphor buds, the removal of the buds at the base of the old stems, tied into a small 0.25-0.5 kg, sent to the cold rack placed, pre-cooled and then bagged and refrigerated. The specific method is: first a piece of 0.02-0.03 mm thick polyethylene film is put in a plastic box or a carton, and then put into bundles, pre-cooled taro buds, add a pack of ethylene absorbent (pre-prepared The broken bricks absorb the gauze bag of the supersaturated potassium permanganate solution), and then the film is folded and put into a freezer shelf to be placed or stacked; or a small plastic film bag is used for storage, and 0.02-0.03 mm thick polyethylene film is used. , Made of 25-3025-30 cm size packaging pouch, each containing 0.15-0.25 kg bale, pre-chilled taro, plus a small packet of ethylene absorbent, tie bag mouth; or use perforated film bags (play Eight holes 5 mm in diameter), zigzag, placed in the freezer rack or packed in stacks. During storage, the temperature should be controlled at 0-1 °C, 80%-85% relative humidity. The bag can form a certain environment of low oxygen and high carbon dioxide. In this way, the humidity can be maintained and the ethylene gas in the bag can be sucked in to prevent the saplings from dehydration, wilting, flaking and rot. Generally, they can be stored for about one month.