I. Fertilization
The succulent roots can grow better when cultivated in a suitable soil, with a correct shape, a smooth outer skin, a beautiful color and good quality. Therefore, the requirements for land preparation are deep ploughing, soil drying, leveling, meticulous, and even fertilization. only in this way can the effective nutrients and beneficial microorganisms be increased in the soil, and water and fertilizer can be stored, which is beneficial to the absorption of nutrients and water by the roots. Fertilization is mainly based on base fertilizers and generally does not require topdressing. Organic fertilizer and compound fertilizer can be applied at one time. Generally, about 2,000 kg of fermented compost per acre is used as seed fertilizer. Generally, flat loquat is used for cultivation. Loquat can be made smaller, which is easy to manage. You can also use small high ridge cultivation, but do not raise the ridge too high, about 10 cm is appropriate.
Second, sowing
Before sowing, immerse for 200 hours in the stock solution of Aspergillus spp. For 3 hours to increase the germination rate of the seeds. In addition, attention must be paid to the quality inspection of the seeds. The freshness of the carrot seeds not only affects the germination but also the yield and quality. It is recommended to choose new seeds that have been harvested in the past 1-2 years. For seeds stored under high temperature and humidity conditions, the root tip of the radicle is easily damaged, the germination rate is low after sowing, and the emergence is slow. The size of carrot seeds also has a certain effect on growth and yield. For seeds with a heavier 1000-grain weight, the cotyledons are large, the true leaves appear early and grow fast, and they can maintain a strong growth momentum until harvest, which has a significant increase in yield. When sowing in the open field, water the bottom water before sowing, and cover the soil with 2-3 cm after sowing to prevent the soil from compacting and water evaporation.
Field management
1. Watering: It can be combined with irrigation, such as gold bacteria, which is beneficial to the rapid growth of carrots and improves the yield and quality of straight roots. Watering should be light, so as not to straighten the roots, especially those with straight roots exposed to the soil. Ten to fifteen days after sowing, the straight roots swell and quickly swell, especially with more watering. 2-3 days before harvesting, properly control moisture, especially for long varieties. Too much moisture and straight roots are easy to crack. If the soil is too dry, the diameter roots are thick and hard, and the flavor is strong, and the quality is significantly reduced. Using hydroponics and sand culture methods, due to balanced fertilizer and water supply, good growth and high yield, straight root fertilizer is tender and crisp.
2. Thin seedlings and fixed seedlings: 3-4 days after sowing, the seeds germinate and unearth. After the emergence of 1-2 true leaves, the thin seedlings are divided into 2-3 times, and the weak, crowded and diseased seedlings are removed. After each seedling should be watered once.
3. Topdressing: Carrots grow quickly. In addition to applying sufficient base fertilizer, topdressing fertilizer must be applied 2-3 times as appropriate. For the first time in 2-3 leaves, the concentration of fertilizer should be diluted, 50 kg of water plus 100 g of urea; to 4-5 leaves, the straight roots quickly expand, at this time in addition to 100 g of urea in 50 kg of water, add 50 grams of potassium chloride, fully dissolved and applied. The nursery bed uses 70% mature soil per side, 30% nutritious soil such as gold bacteria compost, 10 kg of mineral fertilizer, and watered enough to directly soak the soaked seeds.
4. Pest control: spray 500 times with dilute solution of gold bacteria (both front and back of the leaves) or spray 500 times with anti-insect liquid of gold bacteria, spray every 7-10 days, When large-scale insect pests occur, it is necessary to cooperate with natural enemy control to control insects with insects, the effect is better.