2. Humidity regulation: The roots of seedlings planted in greenhouse have poor water absorption capacity, so it is necessary to maintain high air humidity and soil humidity in the early stage, drench the soil after planting, and water according to the dry humidity of the soil in the later stage to keep the air humidity above 85%. Spray water on the seedlings on sunny days to avoid dehydration and dryness. After germination, the air humidity should be 70%. The humidity is too high, not only germination is slow, but also the fragrance is not so strong. So let the air out in time.
3. Adjust the light: Toona sinensis likes light. When planting, try to choose a drip-free film. Uncover the grass and paper during the day, and often clean up the debris on the film, which is beneficial to increase the light. If the light is too strong, cover the grass properly for shading.
4. Topping to promote branching: when picking the second crop of Toona sinensis buds, the top should be removed at the same time, and the top can be topped from 40cm above the ground. After the top is dried, the solution of 15% paclobutrazol should be sprayed, and the suitable concentration is 200-500ppm, which is beneficial to promote the rapid growth of branches and realize dwarf planting. In the later stage, topping and soil cultivation can be carried out in time according to the growth of trees.
5. Water and fertilizer management: Toona sinensis is a fast-growing woody vegetable. It doesn't need much water during planting and is mainly applied with potassium fertilizer. Every 300 square meters of greenhouse can be applied with about 5000 kilograms of base fertilizer, 150-300 kilograms of plant ash, 6- 12 kilograms of potassium dihydrogen phosphate and 6- 12 kilograms of diammonium carbonate.
6. Cover with a light-tight film bag: When the ground temperature in Grain Rain is above 65438 08℃, the film can be peeled off to let the Toona sinensis seedlings grow naturally. Although Toona sinensis seedlings develop rapidly in the later stage, they are easy to age, so it is necessary to prepare black and red 2-layer and 2-color polyethylene film bags in advance. When the buds of Toona sinensis grow to 5cm, they can be covered with light-shielding film bags, which can not only improve the yield, but also ensure the buds of Toona sinensis not to age. When the buds of Toona sinensis grow to 15cm, they should be picked together and then unpacked for sale. This film bag can be used many times.
7. Picking buds and packaging: When the buds of Toona sinensis grow to 15cm 40-60 days after the film is buckled, they can be picked in the morning and evening if the color is good. Generally, the quality and color of the first crop bud are good, and it can be picked when it grows to 12- 15cm, and the second crop bud can be picked when it grows to 20cm. You can pick 1 time every 10 days. After picking, according to the growth situation, watering and topdressing is beneficial to promote the growth of Toona sinensis buds. After picking, the Chinese toon buds listed around the Spring Festival should be sorted and tied. General 1 bale is 50-100g, and then it is packed in plastic bags and sealed to avoid water loss.