The method of peeling and coating regeneration of Eucommia ulmoides

1. Peeling cycle. Mastering the peeling cycle is of practical significance to improve the bark yield per unit time and economic benefits of Eucommia ulmoides. From the perspective of short-term benefits, the shorter the peeling cycle is, the greater the bark yield is, but the regenerated bark will become thinner and thinner, at the same time, the tree potential will be obviously weakened, and the bark life of trees will be relatively shortened. Therefore, considering the overall benefit, the peeling period of Eucommia ulmoides should be relatively long, and it is suitable to be once every three years.

2. Peeling time. Eucommia ulmoides can be peeled from April to September in the growing season, and the effect is the best from May to July. Peeling should be carried out after 4 p.m. on cloudy or sunny days with a temperature of 25-35 ℃ and a relative humidity of more than 80%. Be careful not to peel the skin on rainy days.

3. Prepare before peeling. In places with good water conservancy conditions, Eucommia ulmoides trees can be watered once a week before peeling; where they cannot be watered, it is best to peel them after a thorough rain. To choose vigorous growth, dense branches and leaves, diameter of more than 6 cm of middle-aged trees (more than 8 years old) as peeling objects. Before peeling, you should prepare a peeling knife (bud grafting knife or electrician knife), transparent film, and binding rope.

4. Peeling method. The peeling section is 10 cm below the first branch of the trunk to 10 cm above the ground. The method is that the tip of the knife is tilted downward 45 °and cut once 10 cm below the first branch of the trunk, and then the tip is tilted 45 °upward 10 cm from the ground. Then cut it longitudinally, reaching the depth of the phloem 3 to 4, be careful not to damage the xylem, then gently pick up the bark with the back of the knife and tear it to both sides with a knife until a 10 cm wide belt is left in the peeling section. The tree belt left behind is beneficial to nutrient transport. Note that in the whole process of peeling operation, hands and tools do not bruise and pollute the peeling surface.

5. Management after peeling. After ⑴ peeling, spray the "high-efficiency tree Zengpiling" solution with a concentration of 1/100000 in time, and then wrap it with plastic film. It is important to wrap the upper part to prevent rain and water, and the lower part should be slightly loose. 40 days after ⑵ peeling, the bandage was untied and the peeling surface was exposed. After unwrapping isolated wood and forest edge wood, you should pay attention to shading and sun exposure.

6. Simple processing of bark. The unfolded bark is relatively stacked together, flattened, compacted and covered with straw to make it sweat. After 1 week, the endothelium turned purple-brown and was taken out to dry.