In everyone's mind, fir piles are very cost-effective and can be used in engineering construction, water conservancy construction, furniture manufacturing, greening support, etc. We can also use fir piles to protect large trees.

1. Support: Due to the large crown, high center of gravity, and small root system of large-scale trees, the tree itself cannot be fixed and is easily blown over by the wind or tilted. Even if the tree shakes, it is easy to cause the roots to shake, preventing the roots from taking root or causing them to tilt. Dew will cause the roots to rot. Therefore, after a large tree is planted, it must be supported. Large trees are generally supported with fir stakes, depending on the size and height of the tree. Use trigonal or 4-corner symmetrical supports, and use short bamboo poles at the bottom. The wooden stakes and supports are fixed so that they are not easy to slide in the wind. The bamboo poles and the tree support parts are tied firmly with hemp ropes. The support parts of the trees should be protected with brown bark or straw ropes so as not to damage the bark. After the support is completed, shake it vigorously. The tree body is solid and does not sway.

2. Prevention of diseases and insect pests: Adhere to the principle of giving priority to prevention and separating prevention and control, and conduct frequent inspections and preventive measures based on the characteristics of the tree species and the occurrence patterns of diseases and insect pests. Once the disease occurs, it is necessary to be targeted and prevent and treat it in a timely manner.

3. Fertilizer: Fertilizer is helpful to restore tree vigor. In the early stage of transplantation of large trees, the root system has low fertility absorption. It is advisable to use external fertilizer, usually once every half a month. Use quick-acting fertilizers such as urea, ammonium sulfate, and potassium dihydrogen phosphate. The fertilizer is prepared into a fertilizer solution with a concentration of 0.5% to 1%. Spray on the leaves in the morning and evening or on cloudy days. Spray again in case of rainfall. After the root system sprouts, you can stop fertilizing the soil. Apply thin fertilizer frequently to avoid damaging the roots. .

4. Antifreeze: The branches of newly planted large trees have late root germination, short annual growth cycle, and little accumulation of nutrients. Therefore, the tissue is not substantial and susceptible to low temperature damage. Antifreeze and heat preservation work should be done well. On the one hand, after autumn, It is necessary to control nitrogen fertilizer, apply more phosphorus fertilizer and potassium fertilizer, and gradually extend the lighting time and increase the lighting intensity to improve the lignification level of the tree and improve its own cold resistance. Secondly, before the cold wave comes in winter, the tree should be well insulated. Work. You can choose to cover it with soil, cover it on the ground, set up wind barriers, build plastic greenhouses and other methods for maintenance.