1. The sowing amount of winter spinach suitable for sowing is quite different between different regions. The minimum is 3-4 kg per 667 square meters; more than 10 kg per 667 square meters. The amount of seeding affects the cold resistance and yield of the plants. When the seeding rate is too large, the seedlings are crowded together, the development of the root system is restricted, the plots grow yellow, the cold resistance is poor, and the rate of dead plants is high. At the same time, the grower's plants grow up and grow in the spring of the second year, and their yield and quality are reduced. When the seeding rate is too low, the leaves will open excessively after the emergence, the upper and lower leaves will overlap, the light receiving area will be reduced, and the plant growth will be slow. Although the weight per plant is larger than that of the close planting, the total yield is not high due to the small number of plants per unit area. The appropriate standard for seeding rate is: after the emergence of individual plants, the light receiving posture is good, the leaves can fully receive the sunlight, the root system is well developed, the individual plants can be fully developed, and the population yield is also high. In areas where the average minimum winter temperature is not lower than -10°C during the winter, when the seed quality is high, the sowing time is appropriate, and the seedlings are not harvested at one time, the sowing amount per 667 square meters is 4-5 kilograms; When sowing or harvesting, the seeding rate can be increased appropriately. In areas with severe cold in the northeast, northwest, and north China, the growth of the seedlings before the winter is small. If the seeding rate is small, the seedlings grow sparsely. When the “frozen water†is poured, the roots and necks of the soil are easily exposed and the roots and necks are frozen. Dry and dry during the winter, "dry neck" phenomenon. So the general sowing amount is larger, 10-12 kilograms per 667 square meters.
2. In the area where there is a wind barrier, a rake with a width of 1.7 meters and a length of about 10 meters will be made from the east to the west. Every 4-5 culverts will be left empty for a wind barrier.
3. Sowing techniques Spinach sowing methods are sowing and drilling two. Areas where the winter is not too cold and the dead seedlings are not severe during the winter are generally broadcast. According to the climate during the local autumn broadcast, it can be broadcasted dry or wet. Dry sowing is to first sow the seeds and then shallow or shallow to make the seeds fall into the soil, then compact the seed to the soil and finally water it. Wet sowing, also known as "falling water sowing," is the first pouring bottom water, such as thin layers of fine soil after water infiltration, and then sow seeds, and finally covered with soil. During the autumn sowing, dry weather is used in areas where the climate is relatively humid and where there is more rain; wet sowing may be adopted in areas where the climate is relatively dry and scarce during the autumn sowing. The wet sowing method has a layer of loose soil covering on the surface of the pod to reduce the evaporation of the soil moisture. The bottom water irrigated before sowing is sufficient to meet the water needed for the seeds to germinate and emerge after a period of time, so as to reduce the number of times of watering before and after emergence. Prevent soil compaction caused by multiple irrigation. In regions where the severe seedlings are severe during the cold winter season, such as the north of northeast, north and northwest, in order to make the seed cover thicker and have the same depth, in order to cultivate strong and cold-resistant seedlings, drill seeding method is adopted. . The ditch is 10-15 cm apart and the ditch depth is 2-3 cm. After the seeds are sown, the soil is compacted and then watered.
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