Detailed key points for spring management of asparagus; do these well to promote high yield
Asparagus is a common vegetable in spring. Generally, it can only be eaten once a year, and its nutrition is much higher than that of ordinary vegetables. It can also improve immunity and prevent high blood pressure and heart disease, making it very popular on the market. As the temperature gradually rises, the dormancy of asparagus begins to end, and it is also the best period for sowing asparagus. So how should asparagus be managed in spring? Let's take a look together.
1. Thoroughly clean the garden
After the spring thaw, asparagus begins to sprout, but the underground sources of diseases and pests also begin to awaken. Thoroughly cleaning the garden in spring is a key measure to prevent asparagus stem blight and root rot. In any field where stem blight and root rot occurred last year, the diseased asparagus must be removed completely and burned in a centralized manner or buried deep. It should not be crushed and returned to the field, so as to avoid the pathogens causing damage again. During harvest, pay attention to the depth of the asparagus to avoid damaging the root crown of the asparagus, which is unfavorable to the growth of asparagus.
2. Watering and ridging
For most plots that have not been irrigated in winter and have poor soil moisture, watering must be done in time so as to ensure the quality of ridging, which is beneficial to later yield and quality. Timely ridging is also an important measure to ensure the quality of asparagus. It is generally carried out half a month before harvest, when the temperature of the about 10 cm surface soil reaches above 10 degrees. If done too early, the soil temperature rises slowly, resulting in a slower speed of spear emergence. The best time for ridging is in mid-March, and the height is generally about 30 cm, which can be increased or decreased according to the actual situation.
3. Apply sprouting-promoting fertilizer
To ensure the yield and quality of asparagus, sprouting-promoting fertilizer must be applied in time. It should be applied before closing the ridges, and must be applied close to the ridges. It should not be broadcast before closing the ridges, as this will not only waste fertilizer but also cause the root crown to rise faster. Fertilization is mainly nitrogen fertilizer. Generally, apply 8-10 kg of nitrogen fertilizer, 4-5 kg of phosphate fertilizer, and 4-5 kg of potassium fertilizer per mu. A compound fertilizer containing 15% each of nitrogen, phosphorus, and potassium can also be used, applying 35 kg per mu, and then supplementing with 8-10 kg of urea.
4. Pest and disease control
The main diseases are stem blight and root rot, which are the two most common diseases throughout the entire growth period of asparagus. Field management should be strengthened, the permeability between plants should be increased, drainage should be done in time after rain, diseased plants should be removed in time when disease occurs, and pesticides should be sprayed comprehensively for control to prevent the spread of the disease. The main insect pest is the wood borer moth, which generally begins to appear in March and has its outbreak period in May. Physical or chemical methods can be used to trap and kill adult moths. Using the pesticide phoxim after dilution for root irrigation has a relatively good effect.
The above is an introduction to the key points for spring management of asparagus. I hope it can help you. If you want to learn more related knowledge, please follow us.