Collection method of birch

Generally, the diameter of birch is above 1.6cm, and juice can be harvested every spring. From mid-March to mid-April, the flow rate is proportional to the diameter, and birch trees over 20 cm can collect 20 kg of juice a day and night. A juice harvesting period takes about ten days, and long-term juice flow may cause birch trees to die, so it is best to take juice from the sunny side. The United States, Canada and Czech Republic have all proved that normal juice harvesting has little effect on birch trees and can be used for 10-20 years. The annual juice yield of birch can reach 3 1- 150kg, and the juice yield per hectare is 20-60 tons.

Experience at home and abroad has proved that after 1-3 years, the diameter yield, wood structure, nutrient composition and plant type of Betula platyphylla have little influence, and the growth of Betula platyphylla only decreases by 20% after 4 years of continuous mining. Except for 3-5 days after germination, there is no obvious change in a certain place in central and southern China. Carpenter's hand drill is the simplest tool to get juice, and it is appropriate to drill holes at a height of 40-60 cm from the ground or between two trees, with the largest flow. Aperture 1- 1.5cm, depth about 6cm. Non-toxic and harmless food containers, such as conduits and plastic cans, which are larger than drilling holes, are used as juice receivers.