The best time to prune poplars is in late winter and early spring. In winter, besides pruning, we should also pay attention to cleaning the trunk, and cut off the branches sprouting due to improper pruning and the dead leaves damaged by pests and diseases in time. Poplar is suggested to be pruned once a year, usually in early spring, to remove its lateral branches and weak buds, so as to promote the better growth of new branches and new buds. When trimming, you can't cut it too hard, just cut it gently.

According to the explanation of the word "Yang" in Shuo Wen Jie Zi, poplar grows rapidly and is the earliest tree that can form a sunshade function, so the right half of the traditional Chinese character of "Yang" is taken from the traditional Chinese character of "Yang". There is also a saying that poplars grow rapidly, tall and straight, and their crowns are tall, hence the name "Yang". The word "Yang" has the same pronunciation as the word "Yang", and "Poplar" means "Poplar", which means a tree with a high crown.

Poplar trees in the first year need light cutting, not heavy cutting.

Pruning is generally carried out in spring, and only the weak buds and lateral branches that germinate need to be pruned, which can promote the germination of new branches and the better growth of new buds. Management must be strengthened after pruning to ensure good ventilation. It is best to apply wound healing agent or plant ash to the wound to promote wound healing as soon as possible. In addition, pruning poplar trees should be carried out in sunny days, and too much humidity can easily lead to wound decay.

Scissors should be sharp. Do not rust. Gestures should be quick, accurate and firm. Uneven wounds are easy to get sick. Don't cut it on sunny days. Don't cut in hot weather. Don't cut when it rains heavily. Otherwise, it is easy to get sick. Whether it's plants or you. Don't cut branches that are too tender. You should also pay attention to skills and plant habits when cutting.

The purpose of shaping is to cut off the competitive side branches that affect the growth of the top main tip, prevent secondary branches and ensure the overwhelming advantage of the central main branch; At the same time, it is necessary to cut off the thicker competitive side branches below 8 meters on the trunk to ensure that the trunk is straight. Plastic surgery should start after the first year of growth. With the growth of trees, the competing branches with thicker middle and lower crowns should be pruned until the trunk is below 8 meters, which is usually completed within 1-3 and 4 years.

Problems needing attention in poplar breeding

1. Soil: Sandy flower soil with rich nutrients and good air permeability can be selected. Before planting, some fertilizers can be mixed into the flower soil to promote plant growth.

2. Watering: This kind of plants has strong drought resistance and can be watered four times a year. Water can be poured once before germination in March, and once again when the plants grow branches and leaves; The temperature is high in hot weather, so water it. After the hot weather, water can be supplied before winter.

3. Degree: The growth momentum of this kind of plants is very good, and the change of four seasons of 1 basically does not affect its growth.

4. Fertilization: At the beginning of plant growth, some fertilizers can be mixed in the soil before planting to promote plant growth, and some fertilizers can be applied after July to promote plant growth.