Planting and Management of Cold season Lawn

Cold-season grass is suitable for growing in most areas north of the Yangtze River, which is cold-wet, cold-dry and semi-dry. It grows best at 15-25 ℃ and can withstand low temperature and cool climate. The common species are precocious grass, ryegrass, fescue, shearing glume and so on. At present, the cold-season lawns planted in most areas are mixed grasses of these genera.

Cold-season lawns can be planted in three seasons a year, and spring is the best. Grass species should be selected according to soil quality when planting. The grass species of precocious grass and ryegrass have higher requirements for soil quality, water and fertilizer, so they are not suitable to be planted in areas with poor soil quality and no sprinkler irrigation. Tall fescue species have strong drought resistance and stress resistance, and can be planted in areas with barren soil and poor water and fertilizer. The suitable dosage of grass seed is 4-5 kg / mu. When sowing, the seeds should be uniform, 1-2 seeds per square centimeter, and the grass curtain should be covered after sowing to prevent water evaporation. Generally, it can germinate in 10-15 days, and remove the grass curtain after germination.

First, water and fertilizer management. The cold-season lawn has strict requirements for moisture. Water management should "see wet and dry, dry and wet alternately". Specifically, watering should be thoroughly watered so that the water seeps into the root layer, and when the water evaporates and dries out, it is poured again for the second time, so as to avoid pouring many times a day and the interval is short. On rainy days in summer, drainage should be carried out in time to prevent stagnant water. The requirement of fertilizer for cold-season lawn is not very strict, so the amount of fertilizer and the times of fertilization can be controlled according to soil fertility and seedling condition, usually in autumn and spring. Compound fertilizer is applied in autumn, nitrogen, phosphorus and potassium are comprehensive, and nitrogen fertilizer is applied in spring, mainly urea. Summer fertilization should be particularly careful, must be based on the seedling situation, thin seedlings should also be less applied, to prevent excessive nitrogen fertilizer, resulting in overgrowth of plants, the occurrence of diseases. After fertilization, should be sprinkler irrigation or choose to apply fertilizer in rainy days, beware of burning leaves.

Second, pruning. Cold-season lawn grows faster, generally 15-20 days should be pruned, summer should appropriately reduce the number of pruning, and increase stubble height, preferably in 10-12 cm pruning, stubble height in 6-8 cm. But the interval is too long, when the grass grows to more than 20 centimeters, cut off more than 1 inch at a time, it will affect the grass growth and lead to alopecia areata. In addition, lawn remediation should be carried out frequently, such as weeding frequently, removing old yellow leaves and rotten leaves, so as to increase grassland permeability.

Third, prevention and control. The main pests of cold-season lawn are mole cricket, grub, ants, earthworms and other ground pests, such as armyworm, locust, aphid, wheat bug, meadow borer and so on. Underground pests can be controlled by chemical mixing, poison bait, spraying and other methods. Aboveground pest control can be sprayed with 1000-1500 times of omethoate EC or 5000 times of 5% rifampicin EC.