What skills do you need to master in temperature management of Toona sinensis cultivated in greenhouse?

The fragrant tender leaves are eaten by vegetables, which have good taste and high nutritional value. Therefore, in recent years, not only the mayor/market supply is insufficient, but also the planting range is expanded. So what are the efficient cultivation techniques of Toona sinensis? How do open air, greenhouse and soilless culture work respectively?

Incense is a fast-growing broad-leaved tree species, with the leeward facing the sun, good drainage, flat terrain, convenient transportation, deep and humid soil layer and fertile soil. Fine loam or fertile land should be chosen, and places with more underground pests should not be used as nurseries.

Choose dominant woody tree species with age 15~30 years, round stem, large crown, shiny leaves, rich aroma, vigorous growth and no pests and diseases.

After the fruit is harvested, bask in the sun, grind until the petals crack, and take out the seeds, but don't expose them to the sun. Otherwise, the germination ability of seeds will decrease.

After the seeds are dried in the shade, they are put into envelopes and stored in a well-ventilated room. Generally, they can be stored for 5~6 months.

First, rub the membrane wings of seeds with hands, soak them in warm water at 40 ~ 50℃ for 4~5 hours, then wash them with warm water once, then wrap the seeds with cotton and germinate at about 25℃.

In the process of accelerating germination, the seeds are washed with 25-30% warm water every day to remove harmful substances secreted by the seeds, and 30-40% of the seeds can be planted after germination.

Sow in March-April every year. High beds should be made for field seedling, with bed width 1.0 ~ 1.5m, height 15 ~ 30cm and walkway width of 40 ~ 60cm. The bed behind the locomotive is covered with yellow soil or burnt soil with a thickness of about 3 cm.

Toona sinensis is relatively moisture-resistant, so you can choose Luffa forest with deep, moist and fertile soil layer, and the soil pH is 5.5~8.0.

Remove weeds, shrubs, cutting residues and then burn them. The place with gentle slope can be completely reclaimed to the depth of 15~20 cm.

The planting density should be based on the purpose of planting trees, with buds as the main species, proper close planting, plant spacing of 2 meters and 2 meters, and blood size of 60 cm, 60 cm and 30 cm. The base fertilizers are mainly phosphate fertilizer, organic fertilizer and compound fertilizer, and the topsoil and soil are backfilled before planting.

Germinate in the dormant period before germination in early spring, and seep water 2~3 days before germination to keep the soil moist.

Pay attention to the use of seedling tools during germination to keep the root system intact. Grade the saplings so that they can be planted together.

Naked seedlings should be planted with yellow mud roots. When planting, correct the seedlings and press the soil carefully with both hands.

In the seedling growth period, we should apply it thinly and frequently, and give priority to organic fertilizer.

Fertilizers (such as ammonium sulfate, urea, etc. ) should be appropriately increased in the fast-growing period.

In the future, it is necessary to control the supply of water and fertilizer, apply phosphorus and potassium fertilizer to improve the lignification degree of seedlings, improve the stress resistance of seedlings, and do a good job in cold prevention and overwintering. If properly managed, annual field seedlings can reach 70 cm high and underground roads can reach 0.8 cm. It is observed that the temperature in the shed is about 25℃, and the buds can grow about 3 ~ 4 cm within 24 hours. In 15, the length is only 1 cm. The warehouse temperature over 35 will affect the color and quality of buds. 10 ~ 15 days is a panacea behind the scenes. If you try to raise the temperature, the warehouse temperature can reach about 30 during the day. During the cumulative germination of natural light temperature 1 month, the daytime temperature is 25 ~ 30, the nighttime temperature is 13 ~ 17, and the germination temperature is 18 ~ 25. According to the situation, cover with grass and paper to raise the temperature or keep warm.

temperature regulation

The root system of seedlings planted on warm film has weak absorption capacity, so it is necessary to maintain high soil humidity and air humidity at the beginning, water them after planting, and then give small water according to the situation. The relative humidity of the air should be kept above 85%, and the seedlings should be sprayed with water on sunny days to prevent the water from drying up. After germination, the relative humidity of air should be 70%. If the humidity is too high, not only the germination will be slow, but also the aroma will be greatly reduced. Therefore, it is necessary to blow air in time to expel moisture.

Adjust lighting

Toona sinensis night light tries not to use mucous membrane. During the day, take off the grass and paper quilt in time, often clean up the debris on the film and increase the light. If the light is too strong, you can cover the grass curtain properly.

After removing the sesame oil from the second tree, remove the upper part at the same time (hit the roof 40 cm above the ground). Spraying 200-500 ppm 15% paclobutrazol solution after thinning, adjusting normal advantages, promoting the rapid growth of eggplant and reaching dwarfing culture. After that, according to the development of the tree type, topping and pruning are carried out in time to ensure the multi-branch germination and high yield of the crown and ensure high yield and high quality.

Xiang is a fast-growing woody vegetable, which requires less water and more potassium fertilizer. Every 300 square meters of hot film, the base fertilizer needs to be about 2500 kilograms of mature and high-quality farmyard manure, 75- 150 kilograms of pasture or 3-6 kilograms of potassium dihydrogen phosphate and 3-6 kilograms of carbon dioxide. After each picking, according to the soil fertility, the growth and leaf color of Toona sinensis, appropriate autumn rain and water are given.

After Grain Rain, if the ground temperature is above 18, the film can be uncovered to let the seedlings grow naturally. After that, the saplings develop rapidly, but they are easy to age, so two layers of black and red polyethylene film bags should be prepared in advance. When the buds of Toona sinensis grow to 5 cm, they can be covered with diaphragm film bags. This can not only improve the yield, but also ensure that the seedlings will not age. When the bud grows to 15cm, it will be picked together with the bag and sold in the bag. This kind of film bag can be used many times.