Citron is a woody vegetable with edible young leaves. When the average temperature in the ten days was 15°C, the young shoots began to sprout and show new leaves. Therefore, the open field tortoise in the middle of the province picking period is mid-April. In the greenhouse production of Citron, the stalks of fallen 1-2 years old citronella are transplanted into the greenhouse. Under the condition of high density planting, certain temperatures and moisture are allowed to germinate, and then the plucked and unfolded young leaves are grown. The key links: First, we must choose the stalk thick, full-filled top of the camphor area planted camphor stems, buds large and full, adequate storage of nutrients, the new leaf production is high. Therefore, the greenhouse shall be selected before planting. When the heavy frost came to the ground, the toon leaves naturally fell off, and the nutrients were returned to the stems and dug out and graded. The annual seedlings are 0.6 to 1 meter high, stems are more than 1 centimeter thick, two-year-old seedlings are 1 to 1.5 centimeters tall, and stems are more than 1.5 centimeters thick. After the emergence of seedlings by the level of classification. The seedling height is 1 to 1.5 meters for the first level, 0.8 to 1 meters for the second level, 0.5 to 0.8 centimeters for the third level. When planting, according to the characteristics of greenhouses in the south and low in the south, the third seedlings are planted on the south, and the first and second seedlings are planted in the middle and the north respectively. Second, make full use of greenhouse space for high-density planting Greenhouse planting of citron, is actually a kind of "false plant." Only when the density is high, the amount of leaf production will be increased and the benefits will be good. According to the size of the seedlings, 80,000 to 100,000 plants per mu are required. More than 10 acres of land are used for 1 mu of greenhouses. When the seedlings are planted, they can open a 30-cm deep ditch along the east-west direction. Put a bundle of citrons in the ditch and backfill the soil to bury the roots. Every 3 to 4 ditch, leave a 45 cm wide walkway for leaf management. After planting, pour root water once. Planting areas generally do not need to use base fertilizer, because the buds sprout long, mainly rely on storage of nutrients in the stem, picking leaves and timely picking, basically do not use the nutrients in the soil, as long as the soil is moist, the air humidity is about 90% can. No top dressing or foliar fertilizers are needed during growth. Third, do a good job in the cold-proof greenhouse, insulation work after the fallen sassafras, germination buds need to have about 25 °C temperature, and the stability of this temperature is not less than 10 hours a day, the general greenhouse is difficult to achieve this requirement. Therefore, it is necessary to warm up the east-west fire lanes in the middle of the greenhouse. In addition, in order to save coal, a 50 cm thick corn stover must be placed on the outside of the greenhouse wall. The backslope of the greenhouse is also covered with old haystacks to reduce heat loss. In addition, the thickness of the front roof rake should not be less than 4 cm. When covering the rake, the rake and rake should be overlapped by 15 to 20 centimeters wide. After the cricket is released at night, it should be covered with a waterproof film on the rake. This will not only play a role in insulation, but also prevent rain and snow from soaking in the grass and affecting its warmth. Fourth, high-temperature germination and temperature management In order to promote the top bud to speed up the sprout, after planting all day heating, so that the room temperature maintained at 25 °C ~ 30 °C. When the apical buds move properly after cooling, the temperature is maintained at 23°C～25°C during the day and 12°C～15°C at night. The temperature difference between day and night is not lower than 10°C to prevent the stems and leaves from growing too fast and the leaves are thin and light in color. , tasteless, quality decline. V. Making full use of greenhouse facilities The annual harvest time of greenhouse plants will be two or three. The harvest season of greenhouse citrons is mainly in winter, that is, from January to mid-June. At this time, the stalks of sassafras are excavated and planted at 6000-8000 plants per acre. After animaging, the anvils are cut at an angle of 10-15 cm from the ground in order to promote the germination of the buds under the excision, and to strengthen the management after warm weather. It moved into the greenhouse and continued its leaf collection. In general production, the leaf collection period is often extended to the end of April, resulting in depletion of nutrients within the stem. If the seedlings are removed from the greenhouse in early March and the base fertilizer is applied in time, you can catch a pile of early-maturing vegetables such as cucumbers, tomatoes, peppers, and beans.
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