How does the latest red leaf grow?

The propagation methods of Photinia chinensis are mainly tissue culture and cutting. Tissue culture has high requirements and cost for facilities and professional technology, which is not suitable for most nurseries and growers. Here, the editor introduces a set of cutting propagation technology which has the advantages of low cost, simple operation, high survival rate and can be produced in ordinary plastic greenhouse.

Cutting facilities and seedbed preparation

The use of single greenhouse cutting, to cover the greenhouse film, plus shading net. After the ground in the shed is leveled, a ground cutting nursery bed is established. The width of the seedbed is about 100 cm, with baffles 10 to 12 cm high. The bottom of the seedbed is covered with a layer of fine sand to facilitate drainage, and the cutting substrate can be made of vermiculite plus peat or clean yellow soil plus fine sand. Seedbeds and substrates should be disinfected with fungicides and pesticides to prevent diseases and insect pests.

Cutting time

The cutting time of Photinia chinensis is spring cutting in early March, summer cutting in early June and autumn cutting in early September.

Cutting of cuttings

Use semi-lignified twigs or woody annual branches, cut into a leaf and a bud, about 3 to 4 cm long, the incision should be smooth.

Cuttings treatment

After cuttings are cut, you should pay attention to moisturizing and insert as much as you can. Before cutting, the incision was treated with rooting agent to speed up rooting and improve the survival rate. The suitable cutting depth is 3 cm and the density is 400 plants per square meter. Immediately pour water after insertion, and spray the leaves with carbendazim and anthrax Fumei mixture.

Post-cutting management

The nursery bed should be checked frequently after cutting. the water content of the substrate should be kept at about 60%, the air humidity in the shed should be kept above 95%, and the temperature in the shed should be controlled below 38 ℃. If the temperature is too high, it should be cooled by spray. Shade from cuttage to rooting and sprouting.

After 15 days, some cuttings began to root, and the water content of the substrate should be reduced appropriately, which should be kept at about 40%. When more than 50% of the cuttings begin to take root, the film can be gradually opened for ventilation, and the shading and light transmittance is about 50%.

When all the panicle strips have roots and more than 50% of the leaves, gradually remove the shade net and film from the greenhouse, and begin to refine the seedlings. It can be combined with spraying foliar fertilizer or low concentration water-soluble chemical fertilizer to promote the healthy growth of cutting seedlings.