In mid-July, in mid-August, asparagus has the highest demand for water and fertilizer, and more than half of the annual amount of asparagus fertilizer should be top-dressed at this stage. Application of nitrogen, phosphorus, potassium compound fertilizer and plant electronic fertilizer. In the second half of August, we will also chase a fall fat. Apply compound fertilizer and urea.
During the growth of asparagus, don't pour the “headwater†so as not to harm the roots and cause the death of the plants. Watering fertilizer after topdressing helps to quickly develop fertilizer efficiency and promote plant growth. Pour autumn water in late August and early September to prevent water shortages and cause premature plant failure. After the wintering water is mastered and frozen, it can be sprayed with general tree protection to prevent freezing and reduce the damage to plants.
The biggest disease of asparagus is stem blight. It is necessary to master the principle of prevention and disease prevention. In prevention and control, when stems grow to more than about 30 cm, a fungicide is sprayed every 7-8 days and a new high-fat film is sprayed at the same time. High-toxic pesticides can be transformed into poisoning. Poisoning pesticides are low-toxicity and low-toxicity pesticides are micro-neutral. poison. The control of pesticides is volatile and elegant, preventing rain erosion, reducing the dosage per acre by half, and improving control effectiveness. Foliar fertilizer can also be added to increase efficiency.
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