Among the leafy vegetables grown in the winter sheds, the planting efficiency of lettuce is high. Therefore, many vegetable growers choose to plant lettuce in the later period of the greenhouse vegetable. The rinsing arrangement is compact and the benefit is not rough. With regard to the continuous reduction of the outside temperature, the management of sheds must pay special attention to three issues. Insulation problems Due to the low temperature, lettuces are prone to vomiting through vernalization. According to relevant data, under normal circumstances lettuce can pass vernalization after 10 to 15 days at a temperature of 2°C to 5°C. Therefore, it is advisable to use two membranes in the shed and use straw curtains for wind insulation around the sheds. In the morning, the farmers can only remove the straw curtains on the east side of the arch shed, and remove the straw sheds on the west side of the arch shed at 12-15 hrs. Cover the grass curtains on the east side and cover the grass curtains on the west side of the arch shed at 15 o'clock in order to ensure the required temperature for the growth of lettuce. Of course, this operation is not static and it depends on the weather conditions at that time. After planting, it should be irrigated with water in order to facilitate the easing of seedlings. However, there can be no accumulation of stagnant water according to the soil moisture conditions. Usually, the water is poured once again and topdressing is performed during the period of planting trees. Although lettuce is a leafy vegetable, in order to prevent excessive sagging fractures of the lower leaves, the use of potash fertilizer should also be strengthened. When watering, the total water-soluble fertilizer with a ratio of N, P, and K of 20 to 10 to 30 can be applied per time per acre. 10 kg to promote the growth of lettuce on the demand for fertilizer. Focus on the prevention of soft rot Lettuce grow faster, the old leaves are larger, and most are attached to the ground, resulting in poor air circulation lettuce bottom, easy to infect bacterial diseases. The vegetable grower can remove all the old leaves on the ground that are on the ground and enhance the ventilation and transparence of the bottom of the lettuce, thereby reducing the bacteria infection. The second is chemical control: lettuce is more sensitive to copper preparations, can be used 72% of agricultural streptomycin 3000 times, 3% of Zhongshengmycin 800 times, etc. for prevention and treatment, spraying once every 7 to 10 days, even spray 2 ~ 3 times. Gelatin Size 1 Empty Capsule,Hpmc Empty Gelatin Capsules,Empty Capsules Size 1,Mixed Empty Pill Capsules Ningbo Jiangnan Capsule Co., Ltd. , https://www.ningbocapsule.com