Comparison of three Propagation methods of four Seasons and Cinnamomum chinense

Four Seasons Osmanthus is one of the most suitable varieties of sweet-scented osmanthus to be viewed in potted plants. it has a strong oval crown, a short plant with a diversity of leafy green or green-yellow, lemon yellow or yellow-white flowers and a long flowering period. It can blossom in all seasons except severe cold and extreme heat, but autumn is the most popular. There are two cultivated types: big leaf cinnamon and sand leaf cinnamon.

Cuttings, high-altitude pressing and grafting can be used to propagate Cinnamomum chinense. However, cuttage propagation is the most commonly used in recent years.

Osmanthus fragrans: several main links should be mastered in sweet-scented osmanthus potted plants.

1. Cutting method

Before sprouting in spring, one-year-old full-grown branches are cut into 5 cm long cuttings, leaving only the upper two or three green leaves and then inserted in the river sand or frog bed (basin) for shade.

It is also possible to cut the green branches of the same year after the growth of new shoots stops in summer and cut them in the same way. If soaking the base of cuttings with noisy butyric acid solution for about 5 minutes, drying and then cutting, the survival rate can be improved and rooting can be greatly advanced.

Leaf insertion in four Seasons Osmanthus nursery

Watering the film and sunscreen or straw curtain after cutting is finished. It is found that when there are no water droplets in the film, the bed surface is dry and the topsoil is gray and white, the water should be sprayed and watered thoroughly, but not too much, otherwise it is easy to cause soil consolidation, breed bacteria and cause cuttings to rot. After insertion, lift the film to replenish water every 5 to 6 days, and spray 0.1% methyl topiramate or carbendazim. 2000 times carbendazim solution was sprayed once every 7 days to prevent cuttings from infecting bacteria and causing cortical rot. It is necessary to always maintain the permeability of the nursery to prevent the young roots of cuttings from rotting due to lack of oxygen; loosen the soil in time after rain to ensure that the soil is loose and ventilated, which is conducive to rooting, but be careful not to touch cuttings. 0.2% urea or potassium dihydrogen phosphate solution was sprayed every 10 days to promote cuttings root and shoot growth. Cut or ring peel the 2012 branches, then wrap them with opposite bamboo tubes, flowerpots, thick paper tubes or plastic films, and fill the gaps with rice chaff ash, moss, culture soil, perlite and other substances, often keep moist, but it is not easy to have too much moisture, and can be cut off from the mother plant after rooting. The inner diameter of the high-pressure bag made of plastic film is generally 4~5cm and the length is 8~10cm. The site of scratching and girdling is at the bottom of the node, where it is easy to root, and the width of the peeled phloem is 1~2cm.

2. High-altitude strip pressing method

Most of them are carried out before sprouting in spring, and can also be carried out during the summer growth period, and it also has a good effect in the plum rain season. According to the experiment, Chimonanthus chinensis took root in 40-50 days and rose took root in 20-30 days. In high pressure propagation, the rooting time is generally long, about 3-4 months. After cutting off the mother plant, it must be placed in a shady place and maintained for a period of time before it can be transplanted.

Note that the soil used for pressing must be loose, moist and rich in organic matter, and should be pressed with the strip. after pressing, the soil should always be moist, and the soil should not be dry and dry, otherwise it will affect the survival and rooting. In cold areas in winter, rice straw and cotton wool must be used to protect against the cold, so that the strips can not be frozen. The rootstocks used for grafting four seasons osmanthus are mainly privet, white wax, cloves, tassel and so on. The disadvantage of Ligustrum lucidum as rootstock is that the root system is too developed to be potted, and it blossoms late. The disadvantage of white wax as rootstock is that it has a short life span, and it is easy to shed leaves and blossom less in winter. When cloves are used as rootstocks, the trunk is thick and thin, and the tree is top-heavy. Tassel rootstock has good affinity, drought and cold resistance, strong adaptability, long life, and the age of the tree can be more than a hundred years. Therefore, the most suitable rootstock for grafting propagation of potted sweet-scented osmanthus is tassel.

III. Grafting techniques

1. Budding method

This method is especially suitable when the rootstock is thick and the rootstock and ear are not easy to leave the skin.

2. Grafting method

Branch grafting can be carried out in dormant period, but it is usually carried out in spring and autumn, and cutting and splitting methods are often used. According to the different parts of grafting, it can be divided into two types: soil grafting (resident grafting) and abdominal grafting.

3. Leaning connection method

The trunk of the rootstock was close to the branch of sweet-scented osmanthus which was suitable for grafting, and a smooth cutting surface of about 3 cm was cut at the suitable position of each, and the depth was about 1 × 3 of the diameter. The two sides are cut against each other, at least one side of the cambium is aligned, and the plastic film strip is used to bind and firm. This method is suitable for the peak growing season, usually from June to July. It can heal about 30 days after grafting, but it is best to separate from the mother after the buds are enriched.

The four Seasons are connected by cinnamon

IV. Management and maintenance

Potted osmanthus had better use sun-dried fish pond mud to crush into aggregates to make pot soil. When planting, it is best to apply some dried chicken manure as base fertilizer and pour enough water to fix the root.

In the management and maintenance, the stagnant water in the basin should be removed in time in the rainy season. Flowering season should not be more watering, otherwise it is easy to fall flowers. Usually should adhere to the "see dry see wet" principle, winter should properly control watering to keep moist. In addition to applying sufficient base fertilizer, topdressing should be applied regularly, and liquid fertilizer based on nitrogen fertilizer can be applied at ordinary times.

END

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