1. Frozen method: The gradually reduced temperature is used to gradually freeze the stored spinach and freeze it in a frozen state until it is marketed. The specific method is to make the same vegetable dish in the direction of the wind barrier in the north side of the wind barrier, the house or the wall of the courtyard. The sorghum is deep with the spinach, and the pre-cooled spinach will be lined in two rows in the middle, leaving in the middle. About 15 cm of gap, do not rely too tightly on the bundle of vegetables to facilitate ventilation. Then, a layer of fine soil or fine sand is coated on the spinach, and then gradually cools with the weather, and the soil is gradually kept frozen, so that it cannot be deep frozen.
At the same time, one or several frozen trenches are dug in the shade, and there is no ventilation channel under the narrow groove where only two rows of spinach can be placed. Place the 8-12 rows of spinach under the wide ditch and dig a depth of about 20 cm. The ends of the spinach are connected to the ground. The spinach roots are placed in the ditch and covered with a layer of straw for moisturizing. When the weather is getting colder, the spinach is slightly frozen and then covered with fine soil or fine sand with the temperature drop, keeping the temperature of the ditch -2 - 4 °C.
Before the market, spinach should be taken and slowly thawed at about 2 °C. The frozen spinach should be protected from crushing and bumping during handling.
2. Sack of spontaneous modified air-conditioning method: The spinach that has been sorted after harvesting is bundled into 0.5-1.0 kg of spinach, and after being pre-cooled by heat dissipation, it is filled with a polyethylene film of 0.06-0.08 mm thick and 110×80 cm. In the bag, the leaves are opposite, the roots are facing the two ends of the bag, about 15-20 kg per bag, which is sent to the cold storage rack, placed open, and then pre-cooled for a day and night, and then inserted into the bag with a round bar about 2 cm in diameter. Tightly, pull out the round bar, or loosen the bag mouth, and leave a large gap in the bag. After the bag is sealed, put it in the temperature of -1 °C °C, 90%-95% relative humidity in the cold storage, in the bag The spontaneous metabolism of spinach absorbs oxygen and carbon, which can gradually form a lower oxygen, higher carbon dioxide gas environment, while the internal humidity conditions are good, can be kept fresh for 2-3 months, and the loss is not large.
Premium Nature Series Wood Flooring
Premium Nature Series Wood Flooring,Wooden Flooring Engineered,Multi Layer Plywood Flooring,Multi Layer Wooden Flooring
Jiangsu Zhenrui Furniture Material Co., Ltd. , https://www.zrwoodboards.com