How to harvest and store Toona sinensis seeds? What are the methods of raising seedlings?

Toona sinensis is an important economic tree species, which is called "vegetable on the tree". Toona sinensis leaf thick bud tender, quality such as agate, rich flavor, rich nutrition, has a high edible value, welcomed by the market, planting value is very high. So how to harvest and store Toona sinensis seeds? What are the methods of raising seedlings? Next, let's have a look with the editor.

How to harvest and store the seeds of Toona sinensis?

Toona sinensis seeds generally began to mature in mid-September, it is best to choose 15 to 30 years of exuberant growth of the tree, see the capsule from green to yellowish brown, can be collected. After the collected fruits are dried for several days, the seeds are taken out and stored in a dry, ventilated and cool place.

What are the seedling raising methods of Toona sinensis?

1. Nursery site selection and land preparation

The nursery land should choose the place with fertile soil, good drainage and low groundwater level. Before soil preparation, apply more organic fertilizer, it is best to plough deeply before winter, and seedling beds can be made after soil preparation, and the seedling beds should be in the north-south direction. Border width 1.5 meters, ridge width 0.3 meters, ridge height 0.15 meters, border surface to be flat, the soil should be fine.

2. Soaking seeds to accelerate germination

The seed coat of Toona sinensis is hard and waxy on the surface. Direct broadcast is not easy to absorb water and difficult to sprout. For this reason, the seeds should be soaked and germinated before sowing to promote seed germination. First, remove the wax from the seed coat, then put the seeds in a jar (about 1/3 of the tank depth) and soak them in warm water (about 45-47 ℃) for one day and night. Remove the swollen seeds and drain them to dry, place them at room temperature to germinate. Rinse with clean water once a day. After 5-7 days, the seeds can be broken and exposed. At this time, the seeds can be sown below. The seeds treated with warm water can increase the germination rate in the field.

3. Sowing season

The sowing time of Toona sinensis seedlings should not be too early or too late. Premature, low ground temperature, delay the unearthed time of seedlings, vulnerable to late frost. Too late, shorten the seedling growth period, affect the seedling growth and Lignification degree. According to the experimental observation, it is more suitable to sow seeds in late March or early April in our city.

4. Sowing and covering soil

Before sowing, the seedling bed should be irrigated with water. After all the water has seeped, the treated seeds should be mixed with fine sand or fine broken vegetable garden soil 15-20 times heavier than the seed weight, and sowed evenly on the seedling border, with a row spacing of 25 cm. Use 2-3 kg of seeds per mu. Then it is covered with fine soil with a thickness of 0.5-1 cm.

5. Seedling stage management

After sowing, keep the seedbed temperature 20-25 ℃ and complete the seedlings about 7-10 days after sowing. At this time, the roots of Toona sinensis seedlings are few, so it is best to spray warm water of 15-20 ℃, keep the temperature at 20-24 ℃ during the day and 15 ℃ at night, and increase ventilation with the increase of air temperature. when the external minimum temperature is more than 10 ℃, the heat preservation cover can be removed and the seedlings can be refined in the open field. The seedlings with 2-3 leaves and 4-5 leaves should be fixed once, and the one-year-old seedlings should be fixed according to the row spacing of 20cm-30cm, and the seedlings should be retained at 150000-210000 / hm2. When the seedling height is about 10cm, it can be moved into the field nursery.

When transplanting, a ditch with a depth of about 5cm should be opened according to the row spacing, and water should be irrigated along the ditch, and the urea solution of 3g/kg should be sprayed in the evening every 10 days or so. The fast-growing period of one-year-old seedlings is from the middle of June to the middle of August. in this period, the management of fertilizer and water should be strengthened, which is mainly based on available nitrogen fertilizer, combined with certain phosphorus and potassium fertilizer, urea 150-225kg/hm2 and diammonium phosphate 150kg/hm2 are applied each time, and appropriate amount of potassium fertilizer is applied. After late August, we should apply more phosphorus and potassium fertilizer and less nitrogen fertilizer, and spray 3g/kg potassium dihydrogen phosphate solution every 10 days for a total of 3-4 times, so as to accelerate the Lignification of seedlings and form full terminal buds.

The above is the introduction of Toona sinensis, the sales range of Toona sinensis is relatively wide, most people like to eat, there is a certain drug value, planting is relatively simple. Friends who want to plant can master the above seedling raising methods.

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