What are the technical measures for spinach sowing management?
After sowing spinach, fasten the greenhouse cover properly. Generally, two waterings are needed for full emergence; 10 days after emergence, water again. Once the two true leaves of spinach unfold, the leaf number, leaf weight, and leaf area increase rapidly. Before 3 to 4 leaves, keep the soil moist, apply 25 kg of ammonium bicarbonate per mu, shallow hoe once, thin out overly dense seedlings, and control water appropriately. In November around "Minor Snow"...
After sowing spinach, fasten the greenhouse cover properly. Generally, two waterings are needed for full emergence; 10 days after emergence, water again. Once the two true leaves of spinach unfold, the leaf number, leaf weight, and leaf area increase rapidly. Before 3 to 4 leaves, keep the soil moist, apply 25 kg of ammonium bicarbonate per mu, shallow hoe once, thin out overly dense seedlings, and control water appropriately. Around "Minor Snow" in November, pay attention to heat preservation and ventilate at noon to remove moisture. To bring it to market earlier, a small arch shed can be set up during the overwintering period. After late January, spinach begins to turn green and ventilation should be gradually increased. The greenhouse temperature should preferably not exceed 25°C; if the temperature is too high, spinach plants become spindly, leaves curl, quality declines, and yield decreases. Also pay attention to watering well for the green-up stage, apply 25 kg of ammonium bicarbonate with the water, and afterward water every 7 to 10 days and apply fertilizer once more.