Fresh ginger storage technology

(I) Suitable conditions for storage The ginger harvested late in the fall is not easy to germinate during the dormant period, and germinates quickly if it encounters suitable conditions after the dormancy period. The main task of storage is to prolong the dormancy period. The main measure for prolonging the dormancy period is to control temperature and humidity. The optimum temperature for storage is about 15°C, and it is vulnerable to freezing damage below 10°C. After being warmed, the frozen ginger pieces are extremely susceptible to rot; higher than 20°C will injure the heat and quickly rot. The optimum humidity for storage is 85%-90%. At the same time storage also requires good ventilation to eliminate the bad gas in the reservoir. (2) Ginger treated before storage can only be harvested when the rhizome is fully grown without frost, and is generally harvested when the frost falls to the beginning of winter. Ginger harvesting is best done on cloudy days; rainy days or rain immediately after harvest, high moisture content, intolerant of storage; the newly harvested ginger has high moisture content, poor water retention of the epidermis, and dehydration and wilting in sunny days. After the ginger is harvested, the pseudo-stems and the leaves are knocked out and carefully selected to remove the unqualified products that are too tender, mechanically damaged, and sick. Ginger with the income of storage, with too much wet soil can be a little drying; Do not spend the night in the field to prevent freezing damage. (c) Storage methods 1. Sand trap method: Disinfect first on the indoor ground, then lay a layer of wet sand (sterilization), and then put a layer of fresh ginger 1.7 meters wide and 1.2 meters high. In the summer, attention was paid to ventilation, which was followed by successive phases. Finally, 25 cm thick wet sand was covered in the uppermost layer. It is 2 meters long, hot and covered with cold weather in winter. 2. Cylinder storage method: the bottom of the cylinder is covered with a layer of wet sand, then a layer of fresh ginger is placed, followed by successive steps. The cylinder mouth is covered with wet sand to form a hemisphere. As the weather cools, the lower part of the cylinder is buried in the soil, and the upper part of the cylinder covers the cold curtain such as straw curtain and wheat straw. 3. Buried method: dig a pit 1 meter deep and 2 meters in diameter at the bottom. The excavated earth is surrounded by the pit, so that the total depth of the pit is 2.3 meters and the upper diameter is 2.3 meters. To make a reality, prevent air leakage. Collapse and dig drains around the pit. In the pit, first put 10 vertical bundles of reeds into a length of 2.3 meters. 10 cm diameter ventilation tower. Ginger block bulk to the pit, the central high, low around, into a head shape. Generally, 5 tons of fresh ginger is stored in each pit, the storage capacity is less than 2.5 tons, and it is difficult to keep warm in winter; the storage volume is more than 10 tons, and large pits are inconvenient to manage. In the early days of the cellar, ginger bulbs were prosperous, producing more heat and raising the temperature. Therefore, a layer of wheat leaves was covered on the ginger surface and a circle of soil was placed around to maintain normal ventilation. Afterwards, the cover soil was added in stages as the temperature dropped, and gradually contracted to the center. The ginger harvested at the beginning of the harvest is crisp and easy to peel off. After one month of pitting, the roots and stems gradually age and the skin and meat are no longer peeling. At the same time, the scars at the stems and leaves are removed, and the top buds are required to be at a higher temperature (20 °C). After the ginger pile sinks, it is necessary to fill the cracks in the earth covering caused by sinking at any time to prevent penetration of cold air and cause the temperature of the pits to drop. The total thickness of the cover soil is 60 centimeters in circumference and 14 centimeters in the center. The pit roof is covered with a pointed roof made of straw and the like. The east, west and north sides are protected from cold and wind. Jiang Rong should be rigorous in order to maintain good internal storage conditions.

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