What are the key technologies for planting and post maintenance of garden seedlings?

Recently, with the continuous deepening of urban ecological construction, landscaping has become an important measure to enhance urban livability, beautify the urban environment, and improve ecological quality. As the core carrier of landscaping projects, the planting quality and later maintenance level of garden seedlings directly affect the shaping effect, survival rate, and long-term stability of the green landscape. Planting seedlings is the foundation, and later maintenance is the guarantee. The two complement each other and are indispensable. If the planting method is improper or the maintenance measures are not in place, it is easy to cause seedlings to wither and die, which not only affects the greening effect but also increases the project cost.
The planting and post maintenance of garden seedlings follow the core principles of "suitable land and trees, scientific planting, fine maintenance, and long-term management", which runs through the entire process of seedling selection, planting construction, and post management. The core goal is to improve the survival rate of seedlings, promote healthy growth of seedlings, and create a green landscape with clear layers and good growth. Industry experts say that there is no unified fixed model for the planting and maintenance of garden seedlings, and targeted technical measures need to be taken based on the variety of seedlings, growth habits, planting environment, and climate conditions to ensure that every link is scientifically standardized, in order to achieve the long-term effectiveness of green landscapes.

The key technology for planting garden seedlings lies in controlling the three core links of seedling selection, pre planting preparation, and planting construction. This is the foundation for ensuring the survival rate of seedlings, and the technical details of each link directly affect the later growth of seedlings.

The selection of seedlings is the primary prerequisite for planting work, and the core is "suitable for the land and trees", which means selecting seedlings with matching growth habits and strong adaptability based on the soil conditions, climate environment, lighting conditions, etc. of the planting area. Before construction, the soil in the planting area needs to be tested to determine indicators such as soil acidity, organic matter content, and permeability. Based on the requirements of green design, seedlings with strong growth, no pests and diseases, and intact root systems should be selected. For example, in areas with acidic soil, acid loving seedlings such as osmanthus, rhododendron, and camellia can be selected; On both sides of the well lit road, light loving seedlings such as paulownia, white wax, and Chinese locust can be selected; In low-lying areas prone to waterlogging, it is necessary to choose moisture tolerant seedlings such as weeping willows and water spruce. At the same time, the specifications of seedlings need to match the planting scene. For roadside trees, choose seedlings with straight trunks and neat crowns, and for flowering shrubs, choose seedlings with evenly branched branches and full flower buds to avoid blindly pursuing large-sized seedlings and reduce planting difficulty and mortality rate.

The preparation work before planting mainly includes seedling treatment and planting hole arrangement, which are important steps to improve the quality of planting. The treatment of seedlings should be carried out according to the type of seedlings. Bare rooted seedlings need to trim damaged roots and excessively long fibrous roots, preserve healthy roots, trim some branches and leaves to reduce water evaporation, and apply rooting agents to root wounds after pruning to promote root recovery; Nursery seedlings with soil balls need to be protected to prevent the soil balls from becoming loose or damaged. The diameter of the soil balls is generally 6-8 times the diameter of the seedlings. The soil balls should be wrapped securely with grass ropes and non-woven fabrics to prevent collision and damage during transportation. The arrangement of planting holes should follow the principle of "shallow planting with large holes", and the size of the planting holes should be determined according to the specifications of the seedlings. Generally, the planting holes are 30-50 centimeters larger than the soil ball of the seedlings, and the depth is 10-20 centimeters higher than the height of the soil ball. A 10-15 centimeter thick layer of decomposed organic fertilizer mixed with planting soil should be laid at the bottom of the planting holes to improve soil fertility and soil permeability. At the same time, debris such as gravel, weeds, and construction waste in the planting holes should be cleaned up to avoid affecting the growth of the seedlings' roots.

Planting construction is the core link of seedling planting, and the key lies in controlling the planting depth, root extension, and fixation. The planting depth should be moderate. For bare rooted seedlings, the planting depth should be level with the ground at the root and stem. For seedlings with soil balls, the planting depth should be level with the ground at the top of the soil ball or slightly higher by 5-10 centimeters to avoid planting too deep, which may cause the root system to lack oxygen and rot, or planting too shallow, which may cause the seedlings to collapse. When planting, place the seedlings in the center of the planting hole, adjust the posture of the seedlings to ensure that the trunk is vertical and the crown is stretched, and then backfill the planting soil layer by layer. During the backfilling process, gently compact to avoid soil voids and ensure that the roots are tightly integrated with the soil. For tall seedlings or areas with strong winds, support columns should be set up for fixation after planting. The support columns should be made of wood or steel pipes, and soft materials should be placed between them and the main trunk of the seedlings to prevent damage to the bark. The support angle should be reasonable to ensure the stability of the seedlings and avoid wind induced lodging. After planting, water the roots thoroughly in a timely manner. Watering should be slow and even to ensure that the water penetrates deep into the roots, promotes the combination of roots and soil, and reduces wilting of seedlings.

Compared to the planting process, post maintenance is the key to ensuring the healthy growth of seedlings and improving the green landscape effect. It runs through the entire growth cycle of seedlings after planting, mainly covering core technical points such as watering, fertilization, pruning, pest control, and daily management.

Watering and maintenance should follow the principle of "seeing dryness and wetness, watering thoroughly", and be flexibly adjusted according to the growth habits of seedlings, climatic conditions, and soil moisture. Newly planted seedlings have weak root systems and need to strengthen watering management. Watering should be done once a day for 1-2 weeks after planting to keep the soil moist. The frequency of watering should gradually decrease in the later stages to avoid root rot caused by soil water accumulation; Increase watering frequency during dry weather and timely drainage during rainy season to prevent seedling root rot. Watering time should be chosen in the early morning or evening, avoiding high temperatures at noon to reduce water evaporation. At the same time, avoid directly washing the roots and trunks of seedlings during watering to protect their growth.

Fertilization and maintenance should follow the principle of "thin fertilization, frequent application, and on-demand fertilization", and apply fertilizers reasonably according to the growth stage of seedlings and soil fertility to avoid blind fertilization causing fertilizer damage. Newly planted seedlings do not require fertilization within 1-2 months after planting. After the root system recovers and sprouting begins, apply mature organic fertilizer or thin compound fertilizer to supplement the nutrients needed for seedling growth; During the growth period, nitrogen fertilizer application can be appropriately increased to promote branch and leaf growth. During the flowering and fruiting periods, phosphorus and potassium fertilizer application can be increased to enhance flowering and fruiting effects; Apply mature organic fertilizer once in autumn to enhance the cold resistance of seedlings and reserve nutrients for the growth of the following year. When fertilizing, evenly spread the fertilizer around the root system of the seedlings to avoid direct contact with the roots. After fertilization, water it in a timely manner to promote the dissolution and absorption of the fertilizer.

The core of pruning and maintenance is to adjust the crown shape of seedlings, promote branch growth, reduce nutrient consumption, and enhance the ornamental and stress resistance of seedlings. Pruning should be carried out according to the variety and growth habits of seedlings. The key to pruning roadside trees is to keep the trunk straight and the crown shape neat, timely prune diseased and weak branches, excessively long branches, crossed branches, and drooping branches, and avoid overly dense branches affecting ventilation and light transmission; Pruning flowering shrubs should take into account the flowering effect. After flowering, timely pruning of residual flowers and dead branches should be carried out to promote the germination of new branches and prepare for flowering in the following year; Shaped seedlings need to be trimmed regularly to maintain their aesthetic appearance. The pruning time should be chosen during the dormant or growing period. Pruning tools should be disinfected in advance, and healing agents should be applied to the trimmed wounds in a timely manner to prevent the invasion of pests and diseases.

The prevention and control of pests and diseases should follow the principle of "prevention first, comprehensive prevention and control", with a focus on daily monitoring, timely detection of signs of pests and diseases, and prevention of their spread. In daily maintenance, regularly clean the fallen leaves and weeds around the seedlings to reduce the breeding environment for pests and diseases; Strengthen the management of seedling growth and enhance the ability of seedlings to resist diseases and pests. For common pests and diseases, a combination of physical control, biological control, and chemical control can be used. Physical control can be achieved through manual capture, light trapping, and other methods. Biological control can involve the use of natural enemies and biological pesticides, while chemical control requires the use of low toxicity and environmentally friendly pesticides. The dosage and timing of pesticides should be strictly controlled to avoid environmental pollution and pesticide damage to seedlings.

In addition, daily maintenance in the later stage also includes tasks such as loosening the soil and weeding, preventing cold and freezing, and replanting and planting. Loosening and weeding can improve soil permeability, reduce competition between weeds and seedlings for nutrients and water, and control the soil loosening depth at 5-10 centimeters to avoid damaging the roots of seedlings; Winter low temperature weather requires cold prevention measures, such as planting soil at the roots of seedlings and wrapping the trunks to prevent frostbite; For seedlings that wither or die after planting, timely replanting and replanting should be carried out, selecting seedlings of the same variety and specifications as the original seedlings to ensure the integrity of the green landscape.

The reporter learned that with the continuous development of the landscaping industry, seedling planting and post maintenance technologies are also constantly optimized. The application of new maintenance materials and intelligent management equipment has further improved maintenance efficiency and quality. Industry experts remind that planting and post maintenance of garden seedlings is a refined and long-term work that requires attention to every technical detail. Construction and maintenance units should strictly follow industry standards, develop scientific planting and maintenance plans based on actual situations, strengthen personnel professional training, and improve technical level. In the future, we will further promote the green and refined development of garden seedling planting and maintenance technology, and help create a more livable, beautiful, and ecological urban environment.