1. The spinach is buried and the roots of the spinach are not twitched before the heavy snow, and they are bundled with 0.5-1 kg of straw. Dig deep in the back Yin Gaozao about 0.3 meters wide, 0.7-1 meters wide narrow ditch, put the spinach flat in the ditch, pay attention not to pile up and rely too tightly, the soil before freezing soil cover about 15 cm, in the cold when the spinach The cover soil is frozen, and the spinach is at the frozen and frozen edges of the soil. Before the Spring Festival, spinach was dug out and placed in a warmer house. After the spinach had completely recovered, it was tender and fresh. 2. Frozen spinach's frozen and frozen spinach can be divided into ordinary frozen and ventilated and frozen: (1) Ordinary frozen storage method: Select shade dry place, set up shade barrier along the east and west direction, shady on the north side of the barrier. Digging one or several trenches within the scope, its specifications vary according to regional climatic conditions, the ditch depth in Beijing is more or less about 15 centimeters, the width depends on the size and the number of placed spinach, generally about 30 centimeters, and then in the ditch The ground is covered with a layer of fine sand. When the temperature stabilizes to below 0°C, the spinach is bundled into a ditch. Then a layer of fine sand is covered. As the weather gets colder, the soil is covered by stages, and the thickness and frequency of the cover soil are affected. According to the climatic conditions, the Beijing area is divided into 2 to 3 cover soils with a total thickness of 17-20 centimeters. During the cold season, it can be covered with grasshoppers to ensure that the temperature in the ditch is -6 to -8 degrees Celsius and leaves knots. Frozen, but the roots are not frozen. (2) Ventilation Ditch Freezing Method: This method is basically the same as the ordinary frozen method. The difference is that the ditch is 12-15 cm in width and 100-200 cm in width, digging 2-3 depths along the ditch. Width each 20 cm wide vent, and in the ventilation channel horizontal single layer of straw, put the spinach, spinach, and then cover the thin layer, and later covered in phases, the cover method with the ordinary frozen method. The ventilation channel in the ditch is exposed on the ground and should be opened in the early stage to facilitate cooling and freeze the spinach, and it will gradually plug with the cold weather. After the spring, the temperature of the ground rose, and the grass handles of the air passages were gradually removed. 3. The refrigerated storage of spinach is mainly to maintain the spinach at a low temperature near the freezing point without causing the spinach to freeze significantly. Its practice is very similar to that of freezing. Only the storage ditch is slightly wider and deeper, and the cover soil is also thicker. However, the thickness of the cover soil and the time of the overlying soil cover should be flexibly controlled according to the local climatic conditions, otherwise the spinach will be heated and rotted. The frozen spinach generally raises the dish between the beginning of the winter and the light snow, and is then stored in the pit or short-term storage for a few days. After the lower pit, the dish can be covered with a layer of blue leaves, and the top cover is covered with straw or straw. After the weather is cold, it is stamped with straw or paper, so that the temperature in the ditch is stable at 0-2°C. After entering the storage, it is necessary to pay attention to inspection, if necessary, it can be reversed 1-2 times. The above storage method can better maintain the vigor and storage of spinach and reduce the storage loss.