Toon is a perennial woody vegetable, with sprouts (leaves) serving as a portion. In recent years, the use of solar greenhouse cultivation technology, can be listed in the winter, the economic benefits are very significant. I. Seedlings (a) Variety selection As the common cultivars for the greenhouse, there are green oysters, green oysters and red oysters. The former germinated early and yielded high, but the quality of the product was not as good as that of red peony. (b) sowing preparation camphor in 3 and the end of April sowing, germination before sowing. According to the spacing of 30-35 cm, measures are taken, 2-25 kg per mu, after sowing, 2 cm of cover soil, and covered with film on the bed surface. When the seedlings reached 6-8 true leaves, the soil was transplanted in the evening and the spacing was 50 cm. 25 centimeters, 5,000 forests per mu, watered after transplanting, and shaded with straws. After removing the seedlings, remove the straw curtain and pay attention to ventilation. (3) Seedling management Seedlings in the seedling stage are growing slowly at the initial stage. Management is mainly based on loose soil and weeding, followed by a small amount of nitrogen fertilizer to promote seedling growth. From early June to early July, topdressing nitrogen fertilizers, apply 10-15 kg urea per acre. In the middle of July, when the growth of seedlings exceeds 60 cm, the top buds of the seedlings are sprayed with 50PPm multi-effects to dwarf the pesticide, and after 15 days, they are sprayed once again; the top buds can also be wiped when the plants are up to 1 meter in height, which promotes the side-effects. The formation of dwarf plants. After mid-August, stop watering to prevent leggy. In order to increase the degree of hydration of seedlings, 3 å½ potassium dihydrogen phosphate solution can be sprayed. In late October, the seedlings of the citron were brought out before the arrival of Yanshuang. Later, the lateral roots were maintained at 30 cm or more and the height of the seedlings was graded and then planted. Doing with the seedlings, with the planting, seedlings do not overnight. The site of the planting was chosen near the outside of the northern wall of the greenhouse and the shade of the soil was damp. Dig a ditch 1.5 to 1.5 meters deep and 0.35 to 0.45 meters deep (east-west direction). The length of the ditch depends on the number of seedlings. The mud is first dipped in the ditch, then the seedlings are planted obliquely, and the water is poured after the spurs are planted, and a single curtain or corn stalk is placed on the seedlings. Generally, after 10-15 days, all the leaves fall off. Dormant period completed. Second, cultivation and management (a) Before planting, prepare to deep-sweep the soil, apply enough basic fertilizer, and make a file of 15 meters wide and 4.5 meters long. Seedlings were disinfected with potassium permanganate solution before entering the room. (ii) Planting of annual fragrant seedlings with a height of 50 to 60 cm and a stem diameter of about 1 cm. In the mid-November, after the scented ash leaves were planted, seedlings were planted. The size of seedlings was seeded in the south, planted seedlings in the south, planted seedlings in the north, and the density was controlled at about 100 plants per square meter. After the plants were planted, they were poured once. (3) Temperature and light control Greenhouse cultivation of Citron, after planting to Long Festival, no watering, no fertilization, mainly controlling indoor temperature and light. The suitable temperature should be controlled at 20-25°C during the day and above 10T at night, and the daily average temperature should be above 15°C. Germination occurs from 16 to 20 days, and the temperature is controlled above 20°C after germination. The water droplets on the film must be cleared in time to increase the light, so that the temperature of the room will rise faster. Citrons generally require a relative humidity of 60% to 70%. Humidity is too high, germination is slow, and the aroma is greatly reduced. One of the dehumidification measures is to open the ventilation hole at noon to allow the indoor air to circulate and promote the evaporation of water. The second is to control the watering, keep the ground loose, reduce the evaporation of soil moisture, and thus reduce the indoor air humidity. (D) Harvest When the citron bud grows to 12-15 cm, the first harvest can be carried out, all the buds will be taken off, and the growth of the lateral buds will be promoted. After that, they are harvested according to this method. It is generally harvested every 7-10 days, until about the end of March, about 60 days. The urea should be sprayed once after harvesting. After the shoots are harvested, the seedlings are removed from the greenhouse and cultivated in the open field. After falling leaves in winter, the seedlings are cultivated in the room for cultivation. Third, disease control Torreya grandis disease occurs mainly at the seedling stage, common diseases have blight and fall disease. Prevention measures; (l) Seed disinfection, seed soaking in warm water of 55-60°C for 15 minutes; (2) Disinfection of nursery beds, using 25% carbendazim per acre for 3 to 4 kg, mixing and drying for about 200 kg for 24 hours. After spreading evenly, plunge into the soil and make a bed. China Agricultural Network Editor