In early spring, if the winter grasses can be returned to green in advance, it will bring a new green to people, which will cause the entire city to exhale its vitality as soon as possible. After many years of practice, the author summed up the three measures that can make the lawn turn green: First, loose soil in early spring before the lawn returns to green. The loose soil can break the soil cement layer and cut off part of the root system, increase the permeability of the soil, and promote the regeneration and vigorous growth of turfgrass. The loose soil can be made of 20 cm long iron shovels, 1.5 to 25 cm deep into the soil, and can be used to drill 3 times. It can also be drilled with a hole puncher. The hole diameter is 1.5 cm, the hole depth is 35 cm, and the hole spacing is 25 to 35 cm. Second, fertilize fertilizer in the early spring, you can spread the fertilizer directly on the lawn. General use of instant nitrogen, phosphorus, potassium compound fertilizer, 4 kg per mu, or urea 5 kg per mu. Pay attention to even fertilization, avoid excessive application of fertilizer once. Third, the irrigation spring before germination combined irrigation fertilization once return to Qingshui. In recent years, winter drought in northern China is less and less snow. Irrigation can not only replenish soil moisture, dissolve fertilizer, but also promote root germination, return green earlier, and extend turf green time. When watering, it is necessary to pay attention to pouring well, to ensure that the water wet soil layer of 10 to 15 cm, avoid boiled water.
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