Cultivation techniques of Osmanthus fragrans

Osmanthus fragrans is an evergreen broad-leaved tree of osmanthus fragrans family. It has luxuriant branches and leaves all the year round, golden flowers, beautiful but not delicate flowers, fragrant flowers, delicate fragrance but not dew. It has the highest ornamental value among many osmanthus fragrans. Its color, fragrance and flower quantity are better than others in an all-round way. Therefore, it has become a competitive introduction cultivation in gardens all over China, especially for ornamental cultivation. Let's take a look at the cultivation techniques of osmanthus fragrans tree together.

Ecological Habits of Cinnamomum chinense

Jingui is suitable for subtropical climate, warm and humid, the lowest temperature is-13℃, the optimum growth temperature is 15~28℃, the annual average humidity is 75~85%, and the annual precipitation is about 1000 mm. Strong resistance, more like sunlight, but also able to withstand shade, in full light under its branches and leaves grow luxuriantly, flowering dense, in the shade growth branches and leaves sparse, few flowers. The soil requirements are not too strict, except alkaline soil and low-lying land or too heavy, poor drainage soil can generally grow, but the soil layer is deep, loose fertile, drainage good slightly acidic sandy loam is the most suitable. It has certain resistance to harmful gases such as chlorine, sulfur dioxide and hydrogen fluoride, and has strong ability to absorb dust. It is often used in urban and industrial areas.

Propagation Technique of Cinnamomum chinense

1, branch pressure propagation: usually at the end of March and early April, around the female parent, depending on the number of branches can be pressed, along the direction of natural extension of the branches, dig a deep, wide 20 cm small groove, and then press the branches into the groove, and fill the groove with fertilizer, and then irrigate the soil of the pressed branch into steamed bread shape.

2, high-altitude layering: usually in September to October, the hair bamboo tube 1 section broken into 2 pieces, filled with wet soil, set on the healthy branches of excellent osmanthus varieties, another support, often add water, keep the tube moist, more than 1 month later, can produce new roots. In the spring of the following year, it is transplanted and becomes an osmanthus tree, which can bloom in about 3 years.

3. Seed propagation: At the end of May and the beginning of June every year, pick the mature stone fruit on the osmanthus tree, remove the shell, dry it slightly, and store it with wet sand. In early spring of the following year, it is sown on a pre-arranged seedbed, and when the weather turns warm in March, it can germinate and take root. Generally, the seedling height of one year can reach 15 cm or so, and it can grow to 1 meter high in 2 to 3 years. At this time, it can be planted out of the nursery.

4. Grafting propagation: selecting one-year-old healthy lateral branches from plants about 20 years old, cutting two buds, grafting on privet rootstocks, wrapping them with plastic film strips, and germinating in the season. The osmanthus tree can flower after 4 years, but the trunk of osmanthus tree propagated by this method is not straight and is not suitable for use as a roadside greening tree.

5. Cuttage propagation: The cutting season is selected in February when the sap is about to flow, and the cuttings are sprayed with trichlorfon 800 to 1000 times solution one month before the cuttings to eliminate nematodes. Disinfect with lime water 10 to 15 days before insertion, and rinse the cutting bed with clean water 3 days before insertion. Compacting bed soil after planting, covering grass between rows, watering once, and setting up shade frame. When the new branches grow to more than 6 cm, they can be removed from the seedbed for cultivation.

Cultivation Techniques of Cinnamomum chinense

1. Soil preparation and fertilization: choose acid sandy loam with sufficient light, deep soil layer, rich humus, strong permeability and convenient irrigation as nursery land. In the autumn and winter of the last year of transplantation, the nursery land is fully cultivated once, and the holes are dug according to the specifications of plant row spacing of 1×1.5 meters and planting hole of 0.4×0.4× 0.4 meters. 2~3 kg of decomposed farm manure and 0.5 kg of phosphate fertilizer are applied to each hole as base fertilizer. Mix base fertilizer with surface loam and fill into holes. Fertilizer is easily absorbed by saplings after being eroded and fermented by winter snow and spring rain.

2. Timely transplanting: It is best to transplant Osmanthus sinensis when the sap has not yet flowed or just flowed, generally from early February to early March. When taking seedlings, try to keep more roots and hurt less roots. After taking seedlings, plant them as soon as possible. If seedlings need to be transferred from other places, pay attention to moisture to prevent dehydration of seedlings. After planting, the soil should be compacted and watered once, so that the roots of the seedlings are closely connected with the soil.

3. Water and fertilizer management: After golden osmanthus is transplanted, if heavy rain causes ponding in the nursery land, ditch drainage shall be dug. In case of drought, water should be watered to fight drought. In addition to applying sufficient base fertilizer, fertilizer should be applied three times a year, that is, 0.1~0.3 kg of quick-acting nitrogen fertilizer should be applied to each plant in late March to promote its growth and multiple tender shoots; 0.1~0.3 kg of quick-acting phosphorus and potassium fertilizer should be applied to each plant in July to improve its drought resistance; 2~3 kg of organic fertilizer (such as farm manure) should be applied to each plant in October to improve its cold resistance and prepare for winter.

4. Pruning and shaping: Jinguimeng shoots twice a year in spring and autumn. If it is not pruned and wiped in time, it is difficult to cultivate tall plants, and it is easy to form the phenomenon of dense upper branches and few lower branches. In addition to pruning due to tree potential, branch potential growth should be short, generally to thin branch-based, to timely wipe out the trunk base of the sprout, so as not to consume nutrients and disturb the tree shape.

5. Loosening and weeding: Golden laurel is cultivated once in spring and autumn in combination with fertilization to improve soil structure. The cold-resistance ability can be enhanced by building a hill before overwintering and painting the trunk white once. Weed 2~3 times a year to avoid weeds and seedlings compete for water, fertilizer and light.