Pruning: Bonsai trees are still growing. If they are allowed to grow naturally without restraint, it will inevitably affect the shape of the tree and lose its artistic value. Therefore, it is necessary to prune in time, with long-term pruning and short-term pruning, and with dense pruning, to maintain the graceful posture and appropriate proportions of the tree.

Topping: In order to inhibit the high growth of bonsai trees and promote the development of flat side branches, the tender tips of bonsai trees can be removed.

Pick buds: When a bonsai tree grows many adventitious buds at its base or trunk, the buds should be picked at any time to avoid the formation of forked branches and affect the appearance of the tree.

Leaf picking: For foliage tree bonsai, the viewing period is often the germination period of new leaves. For example, the new leaves of the tree, pomegranate, etc. are red. By picking the leaves, the trees can grow new leaves several times a year. The leaves are bright and pleasing to the eye, which improves its ornamental effect.

Pruning: Bonsai trees often produce many new branches. In order to maintain their beautiful appearance, regular pruning techniques are required. The pruning method should be determined according to the shape of the tree. If it has a cloud-like shape, prune the branches into a flat shape. Generally, dead branches, parallel branches, cross branches, etc. that are harmful to the appearance should be cut off in time.

1. Watering

Watering is one of the most important and frequent measures for stump bonsai management. The tree stump is planted in a pot, whether it is a deep pot or a shallow pot. The soil is always limited, and the water it contains is also limited. If the water is not replenished for a long time, the tree stump will wither due to lack of water, so it should be done in time. Observe and water according to the dryness and wetness of the soil to maintain soil moisture. Of course, do not overwater. If you overwater and the pot soil is too wet for a long time, it will easily cause root hypoxia and rot. At the same time, the amount of watering depends on the specific tree species, seasonal changes, and the weather. Generally speaking, in summer or during drought, it is best to water once in the morning and evening. In spring and autumn, water once a day or every other day. When the tree stumps sprout in spring, you can also water once in the morning and evening depending on the situation. During the rainy season or rainy days, there is no need to water, and attention should be paid to drainage. Sandy soil can be watered more, clay soil should be watered less. Watering can be done by spraying water on the leaves or watering at the roots. Generally, the two are combined. Spray water on the leaves first, and then water the roots thoroughly. Be careful not to water "half-way", causing the surface of the basin to be wet and the inside of the basin to be dry, and the leaves will be wet. Do not spray water on the surface too much, as it may cause the branches and leaves to grow excessively.

2. Fertilization

The soil in the pot of stump bonsai is limited, so the nutrients are also limited. Pay attention to the supplement of fertilizer. Because of the artistic characteristics of stump bonsai, which is small but large, it should not be fertilized too much or too frequently. It is necessary to master the fertilization content and type, and grasp the fertilization season. The three elements of nutrients for plant growth are nitrogen, phosphorus and potassium fertilizer. Nitrogen fertilizer can promote the growth of branches and leaves of tree stumps; phosphate fertilizer can promote the formation of flowers and fruits; potassium fertilizer can promote the growth of stems and roots, so the selection of fertilizers should be based on the type of tree stump and its growth pattern. And sure.

If you want the stump to have lush branches and leaves, you can apply more nitrogen fertilizer; if you want the stump to have more flowers and fruits, you can increase the phosphorus fertilizer content; if you want the stump to have strong and developed roots, you can apply more potassium fertilizer. Fertilization methods are generally divided into slow-acting fertilization and quick-acting fertilization. Slow-acting fertilization generally involves crushing and decomposing organic fertilizer and mixing it into the soil in a certain proportion. When changing the soil, it is mixed into the pot and allowed to slowly provide nutrients; quick-acting fertilization is made by diluting organic fertilizer or chemical fertilizer. Fertilize according to the seasonal growth needs of the tree stumps, but be careful not to make it too dense. This type of fertilization is not suitable for newly planted tree stumps. Fertilizing on rainy days will cause the fertilizer efficiency to be lost and the effect will be poor.

3. Prevention and control of diseases and insect pests

Diseases on branches: manifested in branch phloem and cambium rot, stem rot and ulcers on branches, branch surface rot, dry If the branches are rotten and spots appear on the branches, Bordeaux liquid should usually be sprayed, followed by lime-sulfur mixture, and the rotten parts should be scraped off.

Foliar diseases: Foliar diseases usually show symptoms such as yellow-brown or black spots, leaf curling, wilting, and early defoliation. They may be yellowing, leaf spot, sooty disease, and powdery mildew. wait. For leaf spot disease, the diseased leaves can be removed and sprayed with Bordeaux mixture; for yellowing disease, 0.1 to 0.2 ferrous sulfate solution can be sprayed on the leaves; for powdery mildew, Baume 0.3 to 0.5 degree sulfur mixture can be sprayed.

Root diseases: The roots of stump bonsai are aging and prone to root rot or root nodule caused by various bacteria and fungi. Pay attention to the disinfection of the pot soil and the control of watering amount.

Scale insect management: There are many types of scale insect damage. It is a pest that sucks sap from tree stumps. After the stumps are damaged by it, it is easy to cause sooty disease, poor growth, yellowing of branches and leaves, early defoliation and other phenomena. The prevention and control method is to use manual brushing to kill, you can use 40% dimethoate EC solution 1000-150O times, or use 80% dichlorvos 1000-1500 times solution to spray it.

Red spider mite management: Red spider mites damage leaves by sucking their juice. After insect damage, the leaves will turn gray and cause yellowing and falling off. The prevention and control method is to spray with 1500-2000 times solution of 40% Dimethoate emulsion or 1000 times solution of 50% glialthion wettable powder

Aphid management: There are many kinds of aphids and the damage is widespread. The damaged tree stumps usually have leaves. Curling and drooping. In severe cases, the leaves become black, dry and fall off. Prevention and control methods: Generally spray with 40% Dimethoate 2000-300O times aqueous solution once a week. Or spray it with 2.5% 800-1200 aqueous solution of Rotana.