Large-leaved boxwood hedges are planted and maintained
Scientific planting
When planting, it is first necessary to open a planting trough according to the requirements, and the width of the planting trough should be greater than the design width of the hedge, which is convenient for planting operations. After the planting trough is opened, the bottom fertilizer should be applied in time, and the bottom fertilizer is preferably decomposed and fermented cow and horse manure. When selecting seedlings, we should pay attention to not introducing seedlings with diseases and insect pests, and plant seedlings on the outside first, and then plant seedlings in the middle, and the plant row spacing should be basically consistent. When planting more than 3 rows of hedges, the plants should be in the shape of a glyph cross, and the adjacent 3 seedlings should be equilateral triangles to facilitate the ventilation and light transmission of the hedges and the neat growth. When planting, the soil should be solidified tree by tree, and the planting height should be basically unified. In the planting process, some greening projects in order to achieve rapid results, often encrypt the planting amount of plants, although it can be effective quickly, but it causes hidden dangers for future maintenance and management, not only easy to disease and insect pests, but also prone to bare-legged rod phenomenon, reducing ornamental value, accelerating plant aging. After the hedge is planted, it should be pruned immediately, which can not only make the hedge uniform, but also effectively reduce the transpiration of the plant and improve the survival rate of the plant. After pruning, it is necessary to topple the water in time, it must be watered thoroughly, and the place where the pothole appears should be filled in time to prevent the root system of the plant from being exposed.
Water and fertilizer are appropriate
Water and fertilizer management is an important part of the maintenance of large-leaved boxwood hedges. The root system of large-leaved boxwood is relatively shallow, the roots are developed, and the drought and flood resistance are not strong. In daily maintenance, it is necessary to determine whether to water or water according to the precipitation situation, so that the soil remains in a most-dimensional state. In late autumn and early spring, it is necessary to water thoroughly through antifreeze and thaw water. After heavy summer rains, it is necessary to remove the accumulated water in time to prevent the water from rotting roots.
In the daily maintenance work, the author often finds that after the application of the bottom fertilizer when planting, few people fertilize the hedge, in comparison, due to the large density of hedge planting, more adequate fertilizer is needed. In addition to the application of the bottom fertilizer, nitrogen fertilizer should be applied once every year after pruning in late spring and early summer, and 1 phosphorus and potassium compound fertilizer should be applied after autumn.
Trim reasonably
Generally speaking, the whole type of hedge must be finely trimmed, and it can be said that the pruning of the hedge is the top priority of the maintenance work. The shape of the hedge generally has two types: regular and irregular. The regular style is common in rectangular or Great Wall battlement rows, irregular shapes with wavy shapes, etc. When pruning, pay attention to the top and inner and outer sides must be cut flat, and the cross-sectional form after pruning is the most reasonable trapezoidal, which can effectively prevent the lower branches and leaves of the hedge from being bald.
In the Lianyungang area, the overall pruning of large-leaved boxwood hedges generally has two time periods: one is late spring and early summer, and the other is around mid-autumn. Pruning during these two periods is beneficial for plant growth. If the spring is pruned prematurely, the new branches have not yet been lignified, it is not easy to germinate the branches under the shear, and it is a season of diseases and insect pests in the summer, such as large-scale pruning, which can easily lead to disease and insect harm and affect its growth. Pruning in late spring and early summer, during the peak growing season, wounds heal quickly, which can reduce the occurrence of pests and diseases. Autumn premature pruning too early, it is summer, prone to diseases and insect pests, too late pruning of the newly germinated branches can not be lignified before winter, susceptible to frost damage, pruning wounds before and after the Mid-Autumn Festival can heal in time, will not germinate too many branches, can ensure the safety of the plant overwintering.
Pest control
Large-leaved boxwood hedges are densely planted and prone to pests and diseases, so pest control is crucial. The prevention and control of diseases and insect pests should be grasped before planting, and first of all, we must pay attention to the quarantine of seedlings, do not introduce seedlings with diseases and insects, and especially resolutely put an end to some seedlings with strong contagiousness such as blight that are not easy to control. In the daily maintenance, in addition to strengthening the pruning of seedlings and making the plants ventilated and transparent, it is also necessary to strengthen the management of water and fertilizer, pay special attention to the application of phosphorus and potassium fertilizers, and enhance the disease resistance of plants. If there are fungal diseases such as powdery mildew, coal pollution disease, powdery mildew, etc., it is necessary to spray broad-spectrum antibacterial drugs in time for prevention and control. For plants with strong contagiousness such as standing blight, it is necessary to remove and burn in time, and spray disinfect the planting soil.
Coal pollution disease
powdery mildew
blight
The common insect pests of large-leaved boxwood are flat-spined moth, red spider, cotton aphid, Japanese turtle wax aphid, silk cotton wood Venus ruler moth, guard spear arrow-pointed shield worm, brown-edged green thorn moth, double-spotted all-day bull, etc., if it occurs, it can be targeted according to the hazard situation.
Rejuvenation method
After years of growth, the large-leaved boxwood hedge will appear bare-legged poles, and in order to overcome this phenomenon, the stubble must be re-sheared. After re-shearing, the plant can stay 15 to 20 cm tall, stimulating the germination of the lower branches. For hedges that do not have bare-legged poles but have aging branches and poor leaf growth, the method of thinning branches should be adopted to increase the permeability of hedges. For the planting of too dense hedges, if necessary, inter-seedlings should also be carried out, that is, according to the growth of hedges, excess and over-dense seedlings should be uprooted, and the inter-seedlings should be based on the principle of leaving weak and strong, many dense places, few or no gaps. In addition, the hedge is re-sheared and flattened, which must be carried out in the sunny weather in late spring and early summer, because summer is the growth period of the plant, and the shear of the plant heals quickly, which can restore the landscape effect in the shortest period.
Strengthening water and fertilizer management is an important measure to rejuvenate the aging large-leaved boxwood hedge. After the large-leaved boxwood hedge has been pruned, it is the peak growing season, and it is necessary to give sufficient water and fertilizer. Fertilization should adopt the principle of combining organic and inorganic fertilizer, root fertilization and leaf spraying. The period of fertilization and the type of fertilization should also be treated differently. According to the author's experience, nitrogen fertilizer should be the main in early summer, phosphorus and potassium fertilizer in early autumn, and decomposition circle fertilizer in late autumn.
Water the revitalised large-leaved boxwood hedges, and in the summer drought should be watered frequently and thoroughly. For some hedge plants with shallow roots and not drought tolerance, spraying should also be given in particularly dry weather. After watering, the soil should be loosened in time to preserve the soil. During the rainy season, especially on consecutive rainy days, drainage is also very important, if not drained in time, it is bound to lead to plants suffering from waterlogging and death.
Doing a good job in pest control is also an important link in the restoration of hedges. The large-leaved boxwood hedge should be sprayed with fungicide 1 time immediately after the stubble is flattened to prevent the wound from being infected by germs. In the subsequent growth period, diseases and insect pests should be controlled in accordance with the principle of "early treatment and cure". Fungicides should try to use a wide spectrum of antibacterial agents such as bacillus, carbendazim, etc., insecticide should be treated with medicine, such as more serious insect pests, but also should take a combination of spraying and root application methods to kill insects, pesticides should be used alternately, so as to avoid diseases and insects from drug resistance.