First, facilities and seedbed preparation. Monolithic greenhouse cuttings are used to cover the film of greenhouses and shade nets. A ground cutting seedbed was established after the ground was leveled in the shed. The seedbed width can be about 100 cm, and a baffle of 10-12 cm high is installed around. The bottom of the seedbed is covered with a layer of fine sand for drainage. The cutting matrix can be made of vermiculite and peat, or a clean yellow heartland with fine sand. Seedbeds and substrates should be sterilized with fungicides and insecticides to prevent pests and diseases.
Second, cuttings. It can be inserted in spring in early March, summer in early June or autumn in early September. The length of cuttings is controlled at 4-6 cm, leaving 1-2 healthy leaves. If the leaves are too long, they should be cut at about 4 cm. Cuttings before cuttings were treated with rooting agents. The cutting depth was 3 cm and the density per square meter was 400. Immediately after plugging in, water was irrigated and the leaves were sprayed with carbendazim and anthrax mixed solution.
Third, post-insertion management
1. Shade the roots from the cuttings until they germinate, keeping the shading rate above 75%. After the red leaf heather cutting, the foliar dressing is often carried out, which can be combined with spraying and preventing diseases simultaneously. From the formation of callus to the growth of young roots, the nitrogen fertilizer solution with a concentration of 5010-6 can be sprayed; the nitrogen fertilizer concentration can be increased to 10010-6 to 15010-6 before the root system is mass-formed and before transplanting.
2. After pestle cutting, pest control should be strengthened. The end of the cutting process should be sprayed with 800 times the carbendazim and thiophanate-methyl, sprayed once every 5-7 days, after the rain must be sprayed fungicide in a timely manner. Photinia fraseri is mainly prone to anthracnose in the cutting stage, and it needs periodical control. The main control agents are anthraquinone fume, mancozeb, and chlorothalonil. Insect pests are mainly harmful to larvae of aphids and moths. The main control agents are imidacloprid and beta-cypermethrin.
After 3, 15 days, some of the cuttings began to grow roots, and the moisture content of the substrate should be appropriately reduced, generally about 40%. When more than 50% of the cuttings begin to grow roots, the film can be gradually ventilated, and the shade can be reduced to about 50%. When all the roots of the cuttings are rooted and more than 50% of the leaves are turned, the shading nets and films of the greenhouse are gradually removed, and sufficient lighting is given to start the cultivation of the seedlings.
Fourth, hardening seedlings and conservation. After the seedlings have taken root, generally the roots grow to more than 3 cm, and they can be moved to the Yameng district to consolidate the seedlings. Seedlings on the roots, the medium with 80% peat + 20% perlite, peat generally have to add lime to adjust the pH, while adding calcium. Seedlings on the seedlings generally have to be followed, with the seed, with watering. Seedlings are prone to frost damage, so it is best to spend the winter in the greenhouse, or to reduce the supply of water, without fertilization. It is best to spend the summer in the shade in the high summer temperatures. Water management should pay attention to see dry see wet. Fertilizer management is generally mixed with 4 kg of slow-release fertilizer per cubic meter of medium. The pots are then periodically poured with nitrogen-soluble water-soluble fertilizer 700-1000 times, depending on the growth of seedlings.
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