Planting method of Chinese toon tree in greenhouse

Toona sinensis in the greenhouse should soak the soil thoroughly after planting, and then cover with paper quilt or grass to keep warm, the temperature in the greenhouse should be controlled at about 25-30 ℃ in the daytime and 13-17 ℃ at night, the fertilization during the growth period is mainly potassium fertilizer, and in the later stage, according to the growth situation of the tree type, topping and branching should be done in time, and when the local temperature is more than 18 ℃ after Grain Rain, the greenhouse film can be removed to allow it to grow naturally.

First, adjust the temperature

1. The general greenhouse temperature is about 25 ℃, and the buds can grow 3-4cm higher within 1 day, while when the temperature is below 15 ℃, it can only grow high 1cm. When the greenhouse temperature exceeds 35 ℃, it will affect the coloring and quality of Toona sinensis buds. About 15 days after plastic film buckling is the slow seedling stage.

2. The greenhouse temperature needs to be controlled at about 30 ℃ during the daytime. After 30 days of natural light and temperature accumulation, after budding, the temperature should be controlled at 25-30 ℃ in daytime, 13-17 ℃ at night, and 18-25 ℃ at budding. It can be covered with grass and paper quilts according to the situation.

Second, adjust humidity

1. For the seedlings planted in the greenhouse, the water absorption capacity of the roots is relatively poor, so it is necessary to maintain high air humidity and soil moisture in the early stage, soak the soil thoroughly after planting, and irrigate small water according to the soil dry humidity in the later stage. The air humidity should be kept above 85%.

2. On sunny days, water should be sprayed on the seedlings to avoid dehydration and dryness. 70% of the air humidity is suitable after germination. High humidity not only causes sprouting slowly, but also the fragrance is not so strong, so it is necessary to release air and dehumidify in time.

Third, adjust the light

Toona sinensis trees like light, planting should try to choose no drip film, during the day will be opened grass, paper, and often clean up debris on the film, is conducive to increase light, if the light is too strong, can be properly covered with grass for shading.

Fourth, topping to promote branching

When picking the buds of the second crop of Toona sinensis, the top should be removed at the same time, and the top should be topped from the ground 40cm. After setting the stem, 15% paclobutrazol solution should be sprayed, and the suitable concentration is 200-500ppm, which is beneficial to the rapid growth of branches and dwarfing planting. In the later stage, topping and branching can be carried out in time according to the growth of the tree type, so as to promote the crown to have more branches and produce more Chinese toon buds, so as to achieve high quality and high yield.

V. Water and fertilizer management

Toona sinensis belongs to fast-growing woody vegetables, and the water demand during the planting period is small, mainly by applying potash fertilizer, per 300m2 greenhouse, the base fertilizer can be applied about 5000 jin of fully mature high-quality farm fertilizer, 150,300jin of plant ash or 6-12jin of potassium dihydrogen phosphate and 6-12jin of diammonium carbonate. After each picking, according to the soil fertility, the growth of Toona sinensis, leaf color, appropriate amount of watering, topdressing.

Sixth, set the light-insulated thin film bag

1. When the ground temperature of Grain Rain is above 18 ℃, the greenhouse film can be removed to let the Toona sinensis seedlings grow naturally. Although the Toona sinensis seedlings grow rapidly in the later stage, they are prone to aging, so it is necessary to prepare black and red 2-layer and 2-color polyethylene film bags in advance.

2. When the buds of Toona sinensis grow to 5cm, you can put on a light-insulating film bag, which can not only increase the yield, but also ensure that the buds of Toona sinensis are not aging. When the buds of Toona sinensis grow to 15cm, they should be picked together with the bag, and then take off the bag for sale. This kind of film bag can be used many times.

7. Sprouting and packaging

40-60 days after plastic film buckling, when Toona sinensis buds grow to 15cm, if the coloring is good, they can be picked in the morning or evening. Generally, the quality and color of the first stubble buds are better, they can be picked when growing to 12-15cm, and 2 stubble buds can be picked when they reach 20cm, which is beneficial to sprouting lateral buds, hidden buds and increasing yield.

During this period, it can be picked every 10 days, and after picking, watering and topdressing are carried out according to the growth situation, which is conducive to promoting the growth of Toon buds on the market before and after the Spring Festival. after picking, the buds should be sorted and bundled, usually 50-100 grams, and then sealed in a plastic bag to avoid water loss.