Detailed Explanation of Key Points of High-Yield Fertilization Techniques for Asparagus
Asparagus, also known as shidiaobai, is a premium nutritious and health-promoting vegetable with extremely high edible and nutritional value. In cultivation and production, reasonable fertilization can increase asparagus yield and quality and boost returns. So how should asparagus be fertilized? Let's take a look together.
1. Nutrient Requirements Characteristics
The growth and development of asparagus require the absorption of relatively large amounts of nitrogen, phosphorus, and potassium from the soil, and sodium is also extremely important for it. According to research, for every 4000 of asparagus produced, 6.8 kg of nitrogen, 1.75 kg of phosphorus, and 5.94 kg of potassium are consumed. The period of greatest fertilizer demand for asparagus is the rapid growth stage, that is, the stem and leaf growth period. In the year of planting or the second year after planting, the fertilizer requirement is only one-third or one-half of the normal fertilizer requirement.
2. Fertilization at the Seedling Stage
When cultivating seedlings, the growing medium is the foundation for cultivating strong seedlings. The growing medium must be nutrient-rich and can be prepared by mixing fertile soil with decomposed pen manure and livestock and poultry manure in a certain proportion. After mixing, add 15-20 kg of dried chicken manure, 0.5-1 kg of superphosphate, and 5-10 kg of plant ash or 1-1.5 kg of compound fertilizer per cubic meter, so that the needs for seedling growth can be fully met.
3. Fertilization During the Growth Period
Asparagus prefers a loose, fertile soil environment, so before planting, the soil should be deeply plowed once. During plowing, apply 2000-3000 kg of decomposed organic fertilizer per mu, then harrow finely and level. Then, in the planting furrows or holes, apply 3000-4000 kg of decomposed organic fertilizer, 40 kg of nitrogen-phosphorus-potassium compound fertilizer, and 20-50 kg of cake fertilizer in layers. After planting, when the seedlings begin to sprout new branches, in order to promote their growth, sufficient water and nutrients must be supplied. Apply 8-10 kg of urea or 10-20 kg of nitrogen-phosphorus-potassium compound fertilizer per mu as a top dressing.
4. Fertilization at the Adult Stage
Fertilization of adult asparagus can be carried out in 3-4 applications. Before spring harvest, in combination with plowing or earthing up, open furrows between the rows and apply 20 kg each of compound fertilizer and urea per mu, or apply 1000-1500 kg of decomposed organic fertilizer. After harvest stops, the nutrients stored in the roots are consumed considerably, and nutrients for stems and leaves still need to be supplied, so fertilization during this period should account for about 70% of the annual fertilizer application, with 3000-4000 kg of organic fertilizer and 20 kg of compound fertilizer applied per mu. In the peak growth season in autumn, in order to ensure normal growth and accumulate more nutrients, around the beginning of autumn, apply 1000-2000 kg of organic fertilizer and 20 kg of compound fertilizer per mu.
The above is an introduction to asparagus fertilization techniques. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.