Ginger is harvested once a year. To achieve an annual equilibrium supply, it must depend on storage. The storage temperature is 11-13°C and the humidity is about 95%.
Short-term storage and preservation: In the indoor floor is covered with a layer of clean wet sand, vertical arrangement of ginger close, each row of ginger cover 4 - 5 cm thick wet sand, then put the second layer of ginger, can be stacked to 1 meter high, the top Cover a layer of 5 cm thick clean wet sand, cover the plastic film to moisturize, in order to prevent the humidity of the ginger pile from being too large, the film can be opened.
Well cellar storage method: Selecting a high topography, low groundwater level, digging a circular wellhead with a diameter of 80 centimeters at the leeward sunny position, gradually expanding its diameter to 1.2 meters at the bottom, 2-3 meters deep, and digging the canal wall so that Management is performed up and down; 2 to 3 storage holes are drilled on the side of the bottom of the well. The height and width of the hole are each about 0.8 meters. The inside of the hole is expanded along with the sides and above, so that the hole is 1.5 meters wide. It is 1.2 meters long and 2-3 meters long; in the bottom of the cave is 5-6 cm thick clean wet sand; insecticidal and bactericidal agents such as chlorothalonil, carbendazim and phoxim are used to sterilize the pits. Before the first frost, the ginger block should be placed vertically or horizontally in a ginger hole. The discharge height should be about 30 centimeters from the top of the cave. Use a brick or stone to build the wellhead so that the wellhead is 40-50 cm above the ground. ; Then use wheat straw to cover the wellhead slightly, and 20 days later, store the hole of the ginger hole with bricks, leaving a small window of 20cm for ventilation; finally cover the wellhead with a cement prefabricated plate and bury it with soil, if the weather Cold or shallow pits can be covered as early as possible.
Tunnel storage: In the leeward sunny, well-structured stilts, dig 2.5-3 meters in length and 1.8-2 meters in height; dig short pits on both sides. The shape and storage method are the same with the pit.
Thermoplastic starch is also called "non-structured starch", which can make the starch structure disordered and thermoplastic by certain methods. Starch molecules for polysaccharides molecular structure, containing a large number of hydroxyl, due to its intermolecular and intramolecular hydrogen bond action, so that its melting temperature is higher, and its decomposition temperature is lower than its melting temperature, so in the heat processing, starch molecules did not melt and first decomposed. The traditional mechanical processing method of plastic is mostly heat processing, so to make starch - based whole starch plastic needs to make natural starch thermoplastic. This thermoplasticity can be achieved by changing the crystalline structure inside starch molecules. Destroy intramolecular and intermolecular hydrogen bonds, disrupt the double helix crystal structure of starch molecules, which will reduce the melting temperature of starch and make it thermoplastic.
Starch-Based Plastics,Cellulose-Based Plastics,Protein-Based Plastics,Some Aliphatic Polyesters
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