Yang Shuqiu Winter Management Points
1. Increase the organic fertilizer in the late autumn and early winter. Ditch 50 to 100 cm from the base of the trunk of Yang, generally 20 to 30 cm wide, 20 to 30 cm deep and 100 cm long. After the ditch is opened, the farmyard manure is filled in the ditch, and the fertilizer amount is determined according to the age of the tree and the size of the tree body, and then the soil is covered. You can open each groove in the opposite direction.
2. Pruning the young trees should be lightly trimmed, with crowns left, competition branches, and care and maintenance. Small poplar trees should not be heavily pruned so as not to weaken the tree and inhibit growth. Usually 1 to 3 years old poplars make a small amount of plastic pruning and keep straight trunks. From 4 to 5 years old, poplars are pruned to 1/3 of the tree height, and after 6 years, they are pruned to 1/2 of the tree height. When the last branch is 6 to 8 meters above the ground, the pruning can be stopped, and no knots can be obtained. Poplar sprouting ability, often after the pruning will grow a large number of sprouting in the lower trunk, it should be promptly trimmed to avoid large consumption of nutrients. Poplars should be kept close to the trunk without pruning. Trimming rough branches should be done with a pruning saw. A shallow mouth should be sawed under the side branches and then sawed from above to prevent tearing of the bark when the side branches break. Saw mouth should be coated with "wounding anti-corrosion film" closed to reduce the loss of water and pests.
3. Cleaning up leaves and leaves is the wintering place for most leaf pests and leaf diseases. Therefore, timely cleaning of understory and roadside leaves, eradication of weeds, cleaning and concentrated burning, can kill insects and pathogens.
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