For spinach to be fertilized in autumn and winter, the emphasis is on the type, time and amount of fertilization. Good fertilization management will make it safer to survive the winter in winter and ensure a bumper harvest. Applying enough base fertilizer to overwinter spinach has a longer growth period. To prevent defertilization, base fertilizer must be sufficient. Generally, organic fertilizer and all the phosphorus and potassium fertilizers that should be applied are used as the base fertilizer to be applied in the whole layer, and then the ground is prepared for the border. Appropriate control of nitrogen fertilizer before overwintering. The management standard for fertilizer and water before overwintering is to ensure that spinach grows 4 to 5 true leaves before overwintering, because 4 to 5 true leaves of spinach have the highest cold resistance, too large or too small All are susceptible to freezing damage. Therefore, if the sowing date is appropriate and the accumulation of fertilizer is sufficient, the application of nitrogen fertilizer should be appropriately controlled before overwintering to prevent the seedlings from growing dry matter and reducing sugar accumulation and suffering freezing damage. If the planting is too late or the soil is insufficient, you can consider applying nitrogen fertilizer to promote the growth of seedlings to ensure that the spinach can survive the winter at a suitable seedling age. Strengthen fertilizer and water management after returning to green The key to fertilizer and water management of spinach after returning to green is to seize the opportunity of top dressing. Spinach top dressing is carried out with irrigation. After turning green, top dressing will lower the soil temperature and affect the slowing down of seedlings and growth; top dressing too late will delay the growth of spinach. For overwintering spinach, it is generally more appropriate to topdress it twice in mid-March, late March and early April, because the outside air temperature and soil temperature both rise steadily at this time. Top dressing after overwintering should be done before spinach bolting and flowering, which can prolong the bolting and flowering time of spinach, which is beneficial to improve the yield and quality of spinach. Be cautious when using ammonium nitrogen fertilizer. Spinach is sensitive to ammonium nitrogen fertilizer. The production season of overwintering spinach coincides with the junction of autumn and winter and winter and spring. At this time, the soil temperature is low and the digestion of the soil is weak. Use ammonium nitrogen fertilizer sparingly. , Use nitrate nitrogen fertilizer appropriately. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Shaanxi Hongbaiyi Biotech Co., Ltd. , https://www.sxhongbaiyi.com