1, Toona sinensis likes warmth, and the bigger the Toona sinensis seedlings, the stronger the cold resistance. Therefore, generally speaking, choosing big seedlings will produce more Toona sinensis buds. Toona sinensis is suitable for cultivation in areas where the average temperature is 8~ 10 degrees. Toona sinensis seedlings cultivated by separate seedlings can pick buds earlier than Toona sinensis seedlings grown from seeds.
2. Toona sinensis is suitable for transplanting. Toona sinensis has a dormant period, and autumn leaves automatically enter a dormant state. Generally, the dormancy is completed around New Year's Day, and the real dormancy time of Toona sinensis is generally around three weeks. The transplanting of Toona sinensis seedlings was arranged after New Year's Day in spring and before Toona sinensis sprouted, and the survival rate was the highest. A small amount of Toona sinensis buds can be picked in April of that year.
3. Planting density of Toona sinensis, Toona sinensis seedlings, mainly picking buds, can be transplanted after Toona sinensis dormancy and before germination. Toona sinensis seedlings are planted in the open field, with about 280 to 300 plants per mu, and the buds of Toona sinensis planted in the open field germinate relatively late. The economic benefit of planting Toona sinensis seedlings in greenhouse in off-season is much better than that in open field, and the planting density per mu is higher, generally about 500~520 plants per mu.
4. Toona sinensis seedling method, (1) direct seeding, 3~4 kilograms of high-quality seeds should be prepared in advance per mu of land, and loose and fertile field soil with pH value of 5 ~ 8 should be selected, especially loose and fertile sandy loam with rich organic matter. Select high-quality Toona sinensis seeds, soak them in warm water at 40℃, rub off the wing membrane of the seeds, take out chaff seeds, wash the remaining seeds with clear water, and then put them in a dark environment at 25~30℃ to accelerate germination. About 60% of the seeds can be planted after the white radicle appears.
(2) Sowing: The general row spacing is 20 cm, and the sowing width is 7-8 cm, covered with fine wet soil with a thickness of 1.5 cm, covered with plastic film, and kept moist and heated. After about 5-7 days, the seedlings of Toona sinensis came out. In order to reduce the damage of Toona sinensis buds caused by uncovering plastic film, plastic film can be uncovered when Toona sinensis buds emerge about 30%, and intertillage weeding can be carried out. Seedling raising in that year can be planted after New Year's Day, and a small amount of Toona sinensis buds can be picked in the next year.
(3) Propagation by ramets, and the method of seedling raising by ramets can be adopted for those with less planting. Toona sinensis root system has strong germination ability. After cutting off part of the root system around the crown of the adult plant and watering it, it will germinate again from the broken root system to form a new plant, or it can be watered immediately after taking out the seedlings in the original position to promote the roots remaining in the soil to continue to germinate into new plants. Then it can be managed routinely, and can be transplanted and planted after entering the dormant period.