The quality of autumn asparagus management directly affects the level of asparagus production in the spring of next year. During the period from the summer to the equinox, the temperature during the day is relatively high and the temperature at night is relatively low. The photosynthetic efficiency of the asparagus is high, which is the period for the growth of the asparagus's autumn stems, and is also the period for the storage of asparagus roots and buds. Rational application of fertilizers and watering during this period is the key to the high yield of asparagus in the spring of next year.
1. The field of bamboo shoots planted in the year was filled with 2000-4000 kg of fully-fertilized organic fertilizer per acre in early September. Nitrogen, phosphorus, potassium three-element compound fertilizer 30-50 kg, or 40 kg of special fertilizer for asparagus. Combine the grass, fill the planting ditch and water in time to promote the growth of autumn stems.
2. After the harvest of greenfield asparagus from the second year of life is stopped, timely removal of diseases, yellow, dry, and old stems will have a great benefit on the growth of the fall stems. White asparagus is generally allowed to grow naturally after harvesting in late June. This practice has a great influence on the increase in the output of asparagus in the coming year. White asparagus should be well managed in the autumn, and it should do the same as the autumn management of green asparagus to clear the sick, old, dry and yellow stems. Whether it is white asparagus or green asparagus, 6-9 roots of 1-1.2 cm diameter female stems should be left in the fall, and they should be topped and controlled at a height of 1.3-1.5 meters. Pay attention to piling and pulling ropes to prevent the mother stem from lodging.
More than two years old in the field, the general fertilizer for fall is 3,000-5,000 kilograms of organic fertilizer per acre, nitrogen, phosphorus, potassium ternary fertilizer more than 50 kilograms or 50 kilograms of asparagus fertilizer.
During the fertilization process, attention should be paid to the ratio of nitrogen, phosphorus and potassium, and timely cultivating after the fertilizer is applied. Every year in the end of August in early September, asparagus will have a second peak of disease and insect pests. In the fall of the mother stalk during the autumn, spray 70% mancozeb 800-1000 times per acre, add 20% killing D, 1.8% abamectin 2000-3000 times, spray once every 10 days , Even spraying twice, can prevent asparagus stem blight, brown spot and other diseases, as well as cabbage caterpillar, negative mud insects and other pests. In early September, seedlings will be nursed in time. When they grow to more than 3 stems and the growth period reaches 60 days or more, they will be planted before or during the next spring. As long as management is in place next year, it can reasonably harvest summer bamboo shoots.
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