Home preservation method:
First, after washing the spring buds, blanch them with boiling water, then pottery them with cold water for several times, control the water to dry, pack them in fresh-keeping bags, seal their mouths, and put them in the freezer of the refrigerator. It is best to divide them into small packages and take out a small bag every time you eat.
2. Marinate it with salt, then pack it into small bags in plastic bags and freeze it in the refrigerator. Take it with you as you eat, just like it is fresh.
Toona sinensis bud has high water content, vigorous vitality and strong respiration, and it is prone to browning after harvest, and it is afraid of heat, cold and dryness, and it is easy to rot when the humidity is too high. When the temperature is lower than -3℃, it will freeze into a dark green translucent shape, and it will become sticky after thawing, and the flavor will be reduced. However, in the environment above 11℃, it will easily deteriorate, defoliate and rot, reducing the edible value. At present, the widely used salted storage method has solved the long-term supply problem, but the loss of flavor and nutrition is great, and it can not keep fresh. The preservation and storage methods of Toona sinensis are introduced as follows.
1. Short-term preservation and storage method
1. Picking and preservative treatment: Toona sinensis buds used for short-term preservation can be picked in sunny morning, when the temperature of the vegetable is low, which is beneficial to preservation. Before harvesting, 6-benzylaminopurine (6-BA) with 51×11-6 can be sprayed on the leaves, and the pesticide can be harvested immediately after drying.
2. Storage: (1) Bagged storage. After the Toona sinensis is harvested, it is graded according to its thickness, length and color. Every 511g, it is bound into a small bundle (not too tight), put in a plastic bag or paper bag, and put in a ventilated and cool place or refrigerator. It can be kept fresh for 11-21 days by opening the bag mouth for ventilation 1 times every day. ⑵ Root soaking and storage. The base of Toona sinensis is neat, tied into small bundles, placed in a shallow tray with 3-4 cm of clear water, soaked for 1 day and night, then placed in a basket or box, and stored at 1-1℃ for 1 week.
second, long-term preservation and storage method. China Eating Network reminds us that experiments have proved that blanching, quick freezing and preservation can keep Toona sinensis buds for more than 1 years, and its flavor and quality are basically unchanged when eaten.
the technological process of quick-freezing and fresh-keeping of Toona sinensis buds: cleaning → blanching → cooling → bagging → quick-freezing.
Cleaning: Wash tender Toona sinensis buds with purplish red color and a bud length of 11-15cm without lignification with clear water to remove dust and dirt. Be careful not to rub when cleaning, so as not to cause tissue damage.
blanching: using 1.2% sodium bicarbonate as blanching solution, blanch the Toona sinensis buds in boiling blanching solution for 31 seconds.
cooling: immediately after blanching, put it into sodium bisulfite solution for cooling. In order to speed up the cooling, multiple containers can be used to hold the cooling liquid for staged cooling.
bagging: drain the cooled Toona sinensis buds, and put them into plastic bags with 1.5kg per bag, with the head and tail of Toona sinensis buds arranged neatly and the bag mouth folded.
quick freezing: the packaged Toona sinensis buds are immediately placed in the freezer, quickly frozen for 24 hours, and then stored at -18℃. During quick-frozen storage, we should always check the flavor quality and color change of Toona sinensis buds in the bag so as to sell or treat them in time.