It is also known as Cliff Papaya, and it is a well-known oil-producing tree species in northern China, often referred to as Northern Camellia. This tree is highly valued for its high seed oil content, which can range from 56.3% to 70%, surpassing that of soybeans. The oil produced is of excellent quality, with a pleasant fragrance and rich nutritional value, making it an ideal edible oil. In addition, the seeds contain about 26.7% protein, further enhancing their nutritional profile.
Beyond its oil, the fruit shell has medicinal properties and is used in the treatment of hypertension. The oil residue can be processed into organic fertilizers, adding to its economic value. Its wood is hard, dense, and resistant to decay, making it suitable for furniture, utensils, and even tea production. The tree also features beautiful white flowers, long blooming periods, and a sweet fragrance, making it an excellent ornamental plant for gardens and a valuable nectar source for bees.
Due to its deep root system, adaptability, and ability to thrive in various soil conditions, this tree is ideal for mountainous areas and plays a crucial role in soil and water conservation. Once planted, it begins bearing fruit within three years and can continue producing for over a century, making it a vital woody oil crop in northern China. Locals often refer to it as a "tough and resilient tree," one that is difficult to destroy or damage.
**Nursery Technology:**
1. **Seed Collection:** In mid to early August, when the fruits begin to split, collect the seeds. Remove any debris, dry them thoroughly, and store them in a moisture-proof container.
2. **Germination:** In early April of the following year, use a rapid germination method. Soak the seeds in warm water (45°C) for seven days, then let them cool naturally. After three days, place them in a basket covered with straw and keep them in a greenhouse at 20–25°C. Water twice daily to maintain humidity. As the seeds start to crack, they can be sown in order.
3. **Sowing:** Prepare the bed by raking it deeply, then sow seeds in furrows 3–4 cm deep, spaced 15–20 cm apart. Cover with a mix of nutrient soil (1 part compost to 2 parts soil), about 2–3 cm thick, and gently level the surface.
4. **Management:** After emergence, ensure proper irrigation and drainage to prevent rot. Avoid over-drying, which can hinder sprouting. Apply nitrogen fertilizer monthly from June to July, and spray liquid compound fertilizer once a month. Keep the soil clean and free from pathogens. Seedlings can be transplanted the same year or cultivated for 1–2 years before being moved to the field.
5. **Grafting:** To improve yield and promote early fruiting, grafting is necessary. Use seedlings with a stem diameter of more than 1 cm as rootstocks. Collect scions in March, store them in wet sand, and perform cleft grafting in late April when the bark starts to separate. Make the graft 10–20 cm above the ground. After about two weeks, the buds will sprout. Trim the top of the rootstock just above the new shoot, and when the grafted branch reaches 15 cm, secure it in windy areas and remove any competing shoots.
**Planting Technology:**
This tree has strong adaptability and can be planted using various methods. When establishing an orchard, choose loose, fertile, well-drained sandy loam soil. Plant spacing should be 2x2 meters, 2x3 meters, or 3x3 meters, depending on the site. In mountainous regions, plant more densely, while in fertile plains, space them farther apart. Plant after the spring thaw, ensuring roots are spread out and the planting depth is shallow. Water thoroughly after planting and cover the base with soil to protect the young trees.
Apply nitrogen fertilizer before bud break, phosphorus and potassium fertilizers in June, and a final application in autumn. Combine watering with fertilization for best results. Avoid excessive watering to prevent root rot. With proper care, the tree thrives and becomes a valuable resource for both agriculture and the environment.
Lead Xray Blanket 0.5Mmpb,Dental Xray Shielding Blanket,Lead Lined Xray Protection Blanket,Lead Blankets For Patient
Longkou Kangxie Medical Instrument Co., Ltd , https://www.kangxiemedical.com