How should asparagus seedlings be fertilized? A detailed explanation of scientific fertilization methods
How should asparagus seedlings be fertilized? Please explain the methods. During their development, asparagus seeds are inevitably affected by various pests and diseases. Now I will teach you the fertilization techniques for asparagus, and I hope they will be useful to all asparagus growers! When cultivating asparagus, use more organic fertilizer to make the soil loose and fertile, which is beneficial to the development of the underground stems and root system...
How should asparagus seedlings be fertilized? Please explain the methods
During their development, asparagus seeds are inevitably affected by various pests and diseases. Now I will teach you the fertilization techniques for asparagus, and I hope they will be useful to all asparagus growers!
When cultivating asparagus, use more organic fertilizer to make the soil loose and fertile, which is beneficial to the development of the underground stems and root system. The fertilizer amount should be determined by comprehensively considering factors such as the amount of plant growth, the fertility level of the soil, and the utilization rate. The amount of plant growth includes the yield of young spears, the weight of aboveground stems, and the growth of underground stems and fleshy roots. Based on an annual yield of 400 kg of young spears per mu, the uptake of the three major nutrients by asparagus is: nitrogen 6.96 kg, phosphorus 1.8 kg, and potassium 6.2 kg. When fertilizing, the utilization rate of nitrogen and potassium is about 50%, and that of phosphorus is 20%. In addition, 20% of the nutrients needed by the plants already exist in the soil, so the actual fertilizer application amount should be nitrogen 11.1 kg, phosphorus 7.2 kg, and potassium 9.9 kg. For those harvesting white asparagus, in the first year after seedling transplanting, between May and August, combine intertillage and loosening of the soil, and apply dilute human manure and urine 3-4 times around the plants to promote vigorous growth of the plant clumps. In the spring of the following year, open furrows on both sides of the plants at a distance of 30-40 cm from the plants, and apply 1500-2000 kg of compost, 25 kg of superphosphate, 1200 kg of human manure and urine, or 12 kg of urea per mu, mix well with the soil, and then cover with soil. Starting from the third year after transplanting, begin harvesting young spears. After harvesting the young spears, apply 2000-2500 kg of compost, 1200 kg of human manure and urine, 35 kg of superphosphate, and 15 kg of potassium chloride per mu in the middle of the furrow. In summer and autumn, after intertillage and loosening of the soil, apply dilute human manure and urine and potassium chloride 2-3 times near the plants. The focus of topdressing should be arranged in autumn when the plants grow vigorously.
For those harvesting green asparagus, the fertilization method in the first year after transplanting is the same as for white asparagus. From the second year onward, the focus of fertilization is in spring, followed by autumn. In the spring of the second year, before the young stems emerge, dig deep furrows in the middle of the furrow and apply compost, human manure and urine, superphosphate, and potassium chloride, etc. The application amount of various fertilizers is about 70% of the amount applied in one fertilization after the third-year harvest of white asparagus. In summer and autumn, apply dilute human manure and urine and potassium chloride 2-3 times near the plants. The fertilization amount in the spring of the third year is increased by 30% compared with the second year. After the fourth year, the fertilizer application amount should also be appropriately increased.
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