Greening Seedling Transplant Care Management
The tending management of green seedling transplant includes loose soil weeding, drainage irrigation, top dressing, pruning and pest control. In different stages of cultivation, the focus of tending and management work is different. Now it is specifically introduced as follows. After the first transplant, the nursery management of nursery stocks was relatively small at the first transplant (including the second transplant of slow-growing trees). The goal of cultivation was mainly to promote the development and rapid growth of the root system of nursery stocks. The focus is on loose soil weeding and fertilizer management. First, loose soil weeding. As the canopy of the seedlings is not closed, the weeds grow quickly and form nutrient competition with the seedlings, which will inevitably affect the growth of the seedlings. Therefore, we must timely weed the weeds to remove the grasses in addition to early, small, and addition. With the exception of sampan, the weeds on the trails and open spaces should be diverted. After the rain and after irrigating, the topsoil should be loosened immediately and the depth should be 5~10cm. It is advisable to take care not to hurt the rhizomes of the seedlings. After the weeding, we must promptly repair the trails, recover the mud in the surface, and level it. Second, fertilizer and water management. The production of green seedlings is relatively efficient. From the point of view of the sales price of seedlings in recent years, seedlings with diameters below 8 cm have an average diameter of 1 cm at breast height of about 10 yuan. The seedlings with a good tree shape and a size of 8 to 10 cm are better. The price is higher. This shows that as long as the seedlings breast diameter as long as 1 cm, at least 10 yuan in value. Therefore, in the case of excellent soil texture in the nursery, the strengthening of fertilizer and water management and the promotion of robust growth of seedlings can effectively increase economic efficiency. Fertilizer should pay attention to the combination of basal fertilizer and topdressing fertilizer. Base fertilizer can be put into planting pits during transplanting, or it can be cast every autumn and winter season. Top dressing mainly uses compound fertilizer, and it is used for spreading or alms-paste in the growing season. Full-scale fertilizer is applied at least 3 times a year. Under conditional conditions, each time before the germination season and after the new leaves turn green, the fertilizer can be recovered once, and the seedlings grow faster. The last time the annual topdressing is completed one month before entering the autumn and winter seedlings to stop growing. So that seedlings can be timely lignified. Fertilization should be combined with irrigation so that the effect of fertilization can be exerted. Management of nursery stocks after the second transplant The seedlings in the second transplanting stage have basically reached the specification requirements for greening seedlings. The goal of cultivation is mainly to make the seedlings have dense roots and certain dry and crown-type pest-free robustness. Seedlings. Therefore, the focus of tending management work is on fertilizer and water management, pest control and pruning. First, pest and disease control. The prevention and control of pests and diseases must implement the principle of “prevention as the mainstay and comprehensive prevention and controlâ€, and seriously work hard to forecast and prevent pests and diseases so as to cultivate high-quality, healthy urban afforestation seedlings. 1 Do a good job of disinfecting soil and seedlings. Seeds can only be used after quarantine. 2 Strengthen field management, reduce the breeding conditions of pests and diseases, make seedlings grow robustly, and increase resistance. 3Appropriate close planting, proper sparse cutting, improvement of permeability conditions, and reduction of pests and diseases. 4 pests and diseases should be promptly controlled. Second, pruning. 1, the requirements of plastic trim. The pruning of urban afforestation seedlings is based on the natural tree shape, so that due to the tree shape, the crown/height ratio is appropriate, the main lateral branches are well-proportioned, the trunk is complete, and the crown is full. In the process of cultivation, the roadside tree seedlings require that the crown be complete, the trunk straight and straight and even without any scars, and the main lateral branches be distinct. The height of the branch points can be gradually moved upwards through the pruning until the specified dry height, which generally requires 2 to 2.5 meters. Seedling height requirements of 4.5 to 5 meters, crown / height ratio is generally 1/3 to 1/2, crown requirements more than 2.5 meters. Seedlings in the garden are set at a lower height than street trees, generally less than 2 meters, with full crown requirements, a crown/height ratio of 1/2 to 2/3, and a crown width of 2.5 meters or more, and can also be cultivated into multi-dry or curved trunks. type. Seedlings of conifers should be cultivated into full-crown or low-dry, and the main tip should be maintained. Generally not more trim. It is noteworthy that in the process of tree trunk cultivation, when the seedlings do not reach the predetermined specifications, the height of the branching points should not be pruned in one step, because too much pruning will weaken the tree vigor and affect growth. At the same time, the pruning is required to be carried out gradually when the tree vigor is prosperous. The wound will heal easily, and it will not be possible to leave a scar on the trunk due to the pruning. 2. The period of pruning. In general, the rest periods are mainly plastic, and the amount of pruning may be slightly heavier. The growth period is mainly to adjust the tree potential, and the amount of pruning should be light. For young seedlings, in addition to transplanting and trimming, no matter whether it is dormant or growing, try not to trim it to avoid weakening the tree vigor. . Pre-treatment of nursery stock before planting Green seedlings cultivated according to the above regulations can achieve the standard of high-quality seedlings, and are the standard seedlings for urban greening. However, after such seedlings are planted on site and planted, it takes a long time to recover to achieve the desired greening effect. If this recovery period is arranged at the nursery, the greening effect can be achieved immediately after seedlings are planted and planted. At present, this practice has been implemented in bagged and potted shrubs. In the case of large-scale tree-type green seedlings, in recent years, several nursery stocks maintenance sites in Nanhai and Huaxiu are doing this work. This is the future use of urban greening. The goal pursued by Miao. The basic approach is to raise the seedlings that meet the specification standards from the seedlings, carry out trunk trimmings, tree heights, crown widths, and root trimming as required, plant them into large containers, and cultivate them in the maintenance yard for three months to six months. When the seedlings survive and grow, the tree shape becomes the finished seedlings when they meet the requirements.