Asparagus sowing and management after sowing

First, sowing time is to make use of the longest growing season, sowing as early as possible in spring. The sowing time should be 18 ℃ 20 min after the frost period. The higher the ground temperature, even up to 32 ℃, the faster the sprouting. Sowing too late in the growing season can lead to smaller mother plants. Therefore, if sowing too late in the growing season, try to use various methods to promote the rapid and uninterrupted growth of the plant. 2. The best asparagus mother plant can be obtained when the distance between seedlings and nursery bed is 5ml and 7cm. If the distance is too small, the yield of asparagus mother plant will be reduced, and if it is too large, the land will be wasted. The seeds are sown in soil holes about 2 cm deep, and can not be used if there are perennial weeds or if the annual weed concentration is too high. The finer the soil is, the more favorable it is to cultivate the mother plant of asparagus, because it is easy to be ploughed and transplanted. The structure of the nursery bed mostly depends on the individual grower and the instruments used. The distance between the center of the seedbed is 75 cm, and a row of seeds are sown on each seedbed. This type of seedbed is suitable for close planting, thus providing the maximum number of plants per mu. This kind of seedbed can be irrigated in furrow, and it is easy to dig when the mother plant is mature or when it enters the dormant period. Third, the soil used to cultivate the mother plant of asparagus by fertilization and irrigation should be fertile and have good material conditions. The additional fertilizers include nitrogen, phosphorus, potassium and some insufficient nutrients in the soil. The amount of nitrogen, phosphorus and potassium fertilizer per hectare before sowing is 20kg / hm2, which is used for the growth of seedlings in the first month. After that, the maximum growth rate of seedlings could be ensured by applying 40ml 50kg nitrogen fertilizer per hectare per month. Irrigation methods vary from person to person, and water consumption is determined by soil type and structure. Frequent and rapid irrigation can keep the soil moist, but it should not be too wet during the whole growing season of asparagus mother plant. It is generally required that irrigation after fertilization is beneficial to plant absorption and utilization of nutrients. Asparagus is very salt-tolerant after maturity, and the salt tolerance of asparagus seedlings is slightly poor, so the accumulation of salt should be reduced in the early stage of seedling growth.