Seedling raising technique of Cinnamomum camphora

Cinnamomum camphor for camphor evergreen trees, produced in southern and southwestern provinces of our country, Vietnam, Korea, Japan also have distribution, all plants have camphor aroma, chlorine, sulfur dioxide, ozone and fluorine and other harmful gases have resistance, can extract camphor and extract camphor oil, wood is a good material for manufacturing furniture, let's take a look at camphor tree seedling technology!

The growth habit of camphor tree

Cinnamomum camphor tree more like light, slightly shade, like warm and humid climate, cold resistance is not strong, suitable for growth in sandy loam, more water and humidity, but when transplanting to pay attention to maintain soil humidity, waterlogging easily lead to rot root hypoxia and death, but not resistant to drought, barren and saline soil. Taproot developed, deep-rooted, wind-resistant. Strong germination and pruning resistance. It grows at a moderate speed, and its tree is huge like an umbrella, which can shade and avoid cold.

Cuttage propagation of Cinnamomum chinense

1. Cutting selection: Cinnamomum camphor tree with cut sprouts or robust Cinnamomum camphor root sprouts and 2-year-old seedlings from the ground 20~60 cm of the current year branches, cutting seedling survival rate can reach 70~90%, in the cutting before cutting should be ring peeling or girdling softening treatment.

2. Cutting treatment: After cutting back, cut it into cuttings about 4~5 cm long, leave 1 leaf on the upper part, and remove half of the larger leaves. Inclined planting on the bed, the depth is half of the ear, the cutting bed is a soil bed, the bed surface is paved with about 5 cm of good permeability subsoil, the shade degree on the seedbed is 90%, general management is carried out after planting, and water is sprayed once at 11~12 o 'clock every day.

3, cuttage time: camphor tree cuttage in the temperature of 24~26℃, humidity above 80% for good. From the growth and development situation, February to April is the initial period of flowering, germination and shoot taking and leaf changing period. The new leaves are young and tender, so it is difficult to select strips and is not suitable for cuttage. May to October is the rapid growth period of new shoots, easy to take the current year branches, cutting is the best, November to December is not suitable for low temperature.

4, cuttage management: Cinnamomum camphor tree healing rooting stage cutting bed temperature is generally controlled at 15~28℃, relative humidity is maintained at 80~90%, spray once a week 0.2% borax solution or 3% Bordeaux solution, promote healing rooting and prevent pests and diseases. Cover nylon film at the early stage after insertion, and remove it when healing tissue is produced. According to the cutting season, the time of turning the bed is 10~15 days, and the number of times is 2~3 times. When turning over the bed, the cuttings with roots as long as 3~4 cm were found, and then transferred to nutrient bags for seedling cultivation.

Seed and seedling raising of Cinnamomum chinense

1. Seed collection. Cinnamomum camphor tree fruit mature when self-shedding, there are birds pecking, every year from October to December will have mature seeds harvested, and then mixed sand storage, early March can germinate sowing. 7200~8000 seeds per kilogram, germination rate 70~80%, sowing rate 10~ 15kg per mu.

2, soil preparation and fertilization: in early winter for the first time, before sowing for the second time, and apply enough base fertilizer, base fertilizer generally with decomposed manure 1500~2000 kg per mu or 50 kg of carbon amine, 50 kg of phosphorus fertilizer, vegetable cake 150 kg, and then build a high bed, generally bed height 35~50 cm, bed width 1.2 meters.

3. Germination and sowing: camphor tree needs germination before sowing, which can be soaked in warm water at 50℃. When the warm water cools, it can be changed to 50℃ water for repeated soaking for 3~4 times, which can make the seeds germinate 10~15 days earlier. The row spacing of drilling is about 20 cm, and the sowing amount per mu is 10~15 kg. After sowing, it is covered with straw or plastic film to keep the surface soil of the seedbed moist so as to facilitate seed germination.

4, tending management: seedlings unearthed should be removed in time straw or plastic film, to grow a few true leaves seedlings can start thinning, seedling height of about 10 cm can be fixed seedlings. Camphora leaves about 20,000 seedlings per mu. After July, we should strengthen fertilizer and water management and loosen soil and weed frequently. Stop topdressing and irrigation at the end of autumn. Topdressing is generally 2~3 times, the first two times available urea 7~10 jin, the last time available urea 10 kg, phosphorus fertilizer 7.5 kg.

5. Timely transplanting: the transplanting time is suitable from the middle and late March to the middle and early April, and the transplanting density is about 1500 plants per mu. After transplanting, cut off the stem about 10 cm from the ground. When the bud grows to about 10 cm, set the main stem, cut off the redundant branch bud, and leave a relatively thick branch. 2000 kg manure applied to bed surface in winter. This 3-year-old seedlings DBH can reach 3 cm above.