1. Watering
Watering is one of the main lawn maintenance measures. For lawns, watering not only relieves “drought” and promotes nutrient decomposition and absorption, but also improves the tread and wear resistance of lawn plants, speeds up lawn recovery, promotes lawns to turn green early, delays yellowing, and prolongs greening and viewing. It also helps cold-type grass species survive the summer safely. The time and frequency of lawn irrigation should be flexibly controlled according to the location and time. In North China, when the soil temperature reaches 4-8°C, the roots of cold grass begin to grow, and then the leaves grow. When the temperature reaches 15°C, the growth is fastest, and when the temperature remains around 27°C, it turns dormant. The lawn needs a lot of water from the time it starts to turn green, from vigorous growth to dormancy in summer. Therefore, watering should be done 1-2 times a week at this time to keep the soil moist. For normal growing lawns, permeable water should be poured once every spring before germination and after autumn when the growth is about to stop. They are called spring water and frozen water respectively. This is very beneficial to the year-round growth and safe overwintering of leather lawns.
2. Fertilize
Although lawn plants are resistant to barrenness, fertilization is necessary to ensure that the lawn leaves are dark green and grow luxuriantly, to promote balanced growth, and to enhance the lawn’s resistance to weeds and trampling resistance. In addition to adding organic fertilizer when building a lawn, top dressing should be done 1-2 times during the growing season each year. Top dressing mostly uses chemical fertilizers, mainly nitrogen fertilizers. For example, urea is applied at about 2 kg per 667 square meters. It can be spread directly on the lawn and then watered, or it can be spread on the lawn before light rain.
3. Prune
Pruning, also known as cutting or rolling, is an important task to maintain the normal growth and graceful appearance of the lawn. It uses the strong regeneration ability of lawn plants to trim them at a certain height to promote the growth of the regenerated parts, thereby promoting tillering, increasing leaf density, and keeping the lawn low and tidy with a flat surface. The frequency and height of mowing are affected by factors such as management level, lawn type, grass species, temperature, and region. If the lawn has a high level of maintenance and proper watering and fertilization, it will need to be mowed more frequently, and vice versa. Coarse-leafed species need to be pruned more frequently than fine-leafed species. In the north, temperatures are low, lawns grow slowly, and lawns are mowed less often than in the south. The mowing height should be kept as low as possible, generally 4-6 cm for ornamental lawns and no more than 8 cm for ordinary lawns. After the mowing height of the lawn is determined, it should be pruned in time when the growth height of the lawn exceeds 1/3 of the mowing height. If there is not much residue after pruning, it can be left on the lawn and decomposed to increase the organic matter content of the soil. If too many stems and leaves are trimmed and left on the lawn, they will affect the appearance of the lawn and cause lawn diseases, so they should be removed.
4. Remove weeds
Weeds are the main enemy of lawn growth. Once they invade, they will affect the quality of the lawn, causing the lawn to lose its original uniform and neat appearance, which will hinder the viewing. In severe cases, it will affect the normal growth of the lawn, causing the lawn to die in pieces and become deserted. There are two methods of weeding: one is to remove weeds manually. Use a knife to dig up weeds in your lawn and remove all the roots. The second is to use chemical herbicides. When using it, the type of herbicide should be selected according to the type of grass, and the scope and dosage of herbicide should be strictly controlled.
5. Add soil
Due to man-made damage, the lawn is hollow and the grass roots are exposed, so it must be increased year by year to facilitate the regeneration of grass seeds. Add more soil every winter or early spring, and add soil to a thickness of about 0.5-1.0 cm each time. It should not be too thick, otherwise it will affect the growth of the buds. Adding soil can also be combined with the application of organic fertilizers. The first is to improve the soil and increase soil fertility; the second is to prevent water and soil erosion and increase the smoothness and beauty of the lawn.
6. Rolling
Combined with partial hollowing out, the lawn soil is frozen in winter, and the grass roots are often separated from the soil and exposed to the ground, and can easily die when exposed to the sun. Therefore, the lawn is usually rolled in early spring when the soil moisture is moderate before the soil has thawed to the point of germination. Lawn Rolling can not only combine the loose grass rhizomes with the underlying soil, but also improve the smoothness of the lawn. Pressing is often combined with adding soil. Partial hollowing can improve the permeability of the soil and help the lawn absorb water and fertilizer.
7. Prevention of serious illness and harm
⑴Disease
①The main symptom of rust is the production of reddish-brown powdery sores or stripes on stems and leaves, which later turn into dark brown. Generally, rust spores begin to spread in April, first appearing on the leaves, and then expanding to the entire plant in summer. In severe cases, the lawn can wither and die in large areas. The prevention and control method is to first avoid applying nitrogen fertilizer in summer, and the second is to use chemical methods to prevent and control it.
⑵Pests
① This insect causes serious damage to lawns. It eats grass roots and stems, interrupts the plant’s water supply, and causes the stems and leaves to turn yellow and die. Prevention and control methods include killing with black light, trapping with sweet and sour liquid, and spraying with 40% Lesbon 1000 times liquid. ② The pointed-headed locust chews leaves and tender stems. When the occurrence is severe, all the stems and leaves will be eaten. The damage is heaviest from June to August. The control method is to spray 0.5 kg of trichlorfon or dichlorvos per acre with 500 kg of water. You can also concentrate manpower to kill in the morning. ③ Small cutworms feed exclusively on young stems and leaves, preventing the lawn from growing normally. In severe cases, the plants may die in large pieces. The control method is to use 50% Dianon EC, 50 to 100 ml per mu, or 25% carbaryl wettable powder, 200 to 250 ml per mu.
Post time: Aug-13-2024