Variety selection of deep winter wolfberry should choose low temperature, weak light, early maturing, high yield, good disease resistance and commercial varieties, the more appropriate varieties are currently 14624 cabbage lettuce, mosaic lettuce and glass lettuce. Seedlings Sunlight greenhouse Cultivation of lettuce in winter, usually from late October to early November, planting seedlings, planting from late November to early December, harvesting from early January to early Spring Festival. Seed treatment: Before sowing, 75% chlorothalonil powder or 50% carbendazim wettable powder is used for seed dressing, or 500 to 600 times liquid is used to spray the seed bed to disinfect the soil. Note that the seed after seed dressing should be sown immediately, and avoid placing overnight. Sowing: The seedbed soil should use water and fertility, fertile sandy loam. Bed soil preparation: 10 square meters of seedbed with 10 kg of decomposed organic fertilizer, 0.3 kg of ammonium sulfate, 0.5 kg of superphosphate, 0.2 kg of potassium chloride, fully mixed and evenly laid down, poured into the bottom water, soaked after water infiltration . Seeding method: generally used sowing, sowing can be mixed with fine sand to broadcast uniform, after sowing covered 0.3 to 0.5 cm fluvo-aquic soil, and cover film moisturizing. 30-50 grams of sowing per acre. Seed management: The optimum temperature for lettuce germination is 15°C~20°C. When the seedlings begin to unearth, they shall promptly lift the mulching film and prevent it from growing. The temperature of the seedbed is 18°C~20°C during the day and 12°C~14°C during the night. Pay attention to ventilation, in case of exposure to strong light still need to shade. Ensure the normal growth of seedlings. When the seedlings grow to 2 to 3 true leaves, the seedlings are spaced 6 to 8 centimeters apart and grow to 4 to 5 true leaves. Seedlings do not lack water generally do not water. When the seedlings are wilting, they can sprinkle some water, and can spray 1~2 times 75% chlorothalonil 600 times, combined with spraying double effect fertilizer to achieve the purpose of disease prevention and cultivation of strong seedlings. Before planting, prepare soil for deep soil cultivation. Before planting Shizu base fertilizer, Mushi rotting farmyard fertilizer 3000 ~ 3500 kg, after the spread of deep-turning, pouring foot-bottom water, see dry after the crop, deep winter alfalfa cultivation with sorghum film cultivation is better. Planting methods The seedlings were irrigated the day before planting, so that the seedlings were moist and the seedlings were raised as much as possible on the second day to reduce root damage. When planting, first open the ditch on the surface of the planting surface. After the ditching, apply nitrogen and phosphorus compound fertilizer at 25 kg per acre and then apply water. After the water infiltration, place the seedlings at 24 cm from the planting area to seal the ditch. Place the seedlings on the surface and cover the film. Seedling film. Field management temperature management: After the seedling temperature is maintained at 18 °C ~ 22 °C, when the bulb phase is suitable temperature during the day 20 °C ~ 22 °C, night 12 °C ~ 15 °C is appropriate. Fertilizer and water management: After the planting, the seedlings should be poured with water, and afterwards, they should be poured 3~4 times. Sencha Green Tea,Sencha Green Tea Powder,Organic Sencha Green Tea Powder,Sencha Green Tea Leaves SHAOXING ROYAL TEA VILLAGE CO.,LTD , https://www.yccmatcha.com