There are many key points of cultivation techniques for high and stable yield of Toona sinensis in greenhouse. Do you think it's weird?

Toona sinensis is also called Toona sinensis bud tree. Toona sinensis is eaten with fresh buds. Toona sinensis is rich in protein, vitamins, iron, phosphorus, calcium and other nutrients, and has the functions of nourishing hair, regulating blood and invigorating stomach. Toona sinensis is favored by consumers in the market, so many growers are tempted. In addition to open planting, greenhouse planting has gradually increased. So how do you grow in a greenhouse? Can we achieve a stable harvest? Let me talk about my personal views on this issue, hoping to provide you with some useful reference information.

Sowing in time (1): Choose sandy soil with flat terrain, sufficient sunlight, good drainage and fertile fields as the nursery ground, combine soil preparation and fertilization, spread evenly and turn thoroughly. Trenching shall be carried out at the boundary about 1 m wide, with the row spacing of 30 cm, the width of 5-7 cm and the depth of 5 cm. Sow the seeds with accelerated germination evenly and cover them with 2 cm thick soil.

(2): Emerge about one week after sowing. When 4~6 real leaves grow in the soil, they will be thinned. When the plant height is about 50 cm, the seedlings will be dwarfed. Spraying 1.5% paclobutrazol 200~400 times every half month for three times in a row can control overgrowth, promote dwarfing of seedlings and increase material accumulation. At the same time, it can be combined with coring to increase the number of branches.

(3): Low temperature treatment. Generally, before the arrival of the local first frost, when most of the fallen leaves and nutrients return to the trees, the seedlings will be picked. After watering the seedlings, the seedlings grow, then dig into the heels in the shade, cover the roots with soil and water, and cover them with firewood. At the low temperature of 65438 0℃ ~ 5℃, Toona sinensis seedlings were moved into greenhouse after 30 days of natural dormancy.

Second soil preparation and field planting (1): 2000~3000 kg of soil miscellaneous fertilizer and 25 kg of NPK compound fertilizer are applied to every 667 square meters, and after fertilization, deep ploughing and fine soil preparation are carried out to make a flat border with a width of 1.5 ~ 2 meters. One week before planting, close the shed and divide the seedlings. Large seedlings are cultivated in the north of the greenhouse, and small seedlings are cultivated in the south of the greenhouse.

(2): Trenches with a depth of 25 cm are made in the border with a row spacing of 20 cm, and the direction of the trenches is perpendicular to the border surface. Put the seedlings at intervals of 5 cm, and stand the seedlings one by one in the ditch. The roots can overlap, but they should be stretched. Planting 1~2-year-old single-stem seedlings 100~ 120, with 80~90 perennial seedlings per square meter.

Post-planting management (1): temperature and light regulation. 65,438+00 ~ 65,438+05 days after the film is buckled, the daily temperature is maintained at 20℃~25℃, the night temperature is 65,438+02℃ ~ i4℃, and the maximum temperature in day or night cannot exceed 2℃ specified by the above temperature. Toona sinensis should keep good light during the whole growth period, and should be properly shaded after spring to improve its quality.

(2): Fertilizer and water management. When planting, water should be poured enough, and water should be sprayed on the branches during bud stage. After the terminal buds germinate, topdressing outside the roots is carried out once every half month, and 0.2% urea or potassium dihydrogen phosphate is alternately sprayed. Top dressing should be applied after each harvest, and urea 15 kg and appropriate amount of plant ash can be applied per mu each time.

(3): harvesting. Under normal management conditions, it takes about 40 days from sowing to germination, and 7~ 12 days from germination to harvest. Therefore, in order to make the output of Toona sinensis peak in the Spring Festival, it is necessary to ensure that there is a growth period of 60~70 days after the film is buckled. When the buds of Toona sinensis grow to more than 15 cm, they should be harvested in time. Bud picking should be done in the morning and evening or under shady conditions to prevent the buds of Toona sinensis from wilting. The terminal bud can be broken as a whole to stimulate the germination of lateral buds.