1, The characteristics of fertilizer requirements for spinach
Spinach requires sufficient nutrients such as nitrogen, phosphorus, and potassium during its growth process. Among them, nitrogen fertilizer has a significant impact on the growth of spinach and can promote the growth of leaves and plants. Phosphate fertilizer helps with root development and increases stress resistance. Potassium fertilizer can help improve the disease resistance and yield of spinach.
2, Fertilization management
Base fertilizer: Before sowing, apply organic fertilizer and an appropriate amount of compound fertilizer evenly to the soil as the base fertilizer. The application amount of base fertilizer should be determined based on soil fertility and target yield. Generally, 2000-3000 kilograms of organic fertilizer and 20-30 kilograms of compound fertilizer should be applied per mu.
Topdressing: According to the growth of spinach, apply nitrogen fertilizer appropriately during the growth period. In the early stages of growth, 5-10 kilograms of urea can be topically applied per acre; In the middle and later stages of growth, 15-20 kilograms of urea can be topically applied per acre. At the same time, pay attention to supplementing phosphorus and potassium fertilizers in an appropriate amount to improve the quality and yield of spinach.
Leaf fertilizer: In order to supplement the insufficient soil nutrients, an appropriate amount of leaf fertilizer can be sprayed. Foliar fertilizer can be directly sprayed on the surface of leaves to improve the nutrient level of plants through leaf absorption. But it is important to pay attention to the selection and use of foliar fertilizers to avoid causing damage to the plants.
3, Fertilizer dosage control
Control the amount of nitrogen fertilizer used: Excessive application of nitrogen fertilizer can cause problems such as yellowing of spinach leaves and elongation of plants, affecting yield and quality. Therefore, it is necessary to control the amount of nitrogen fertilizer appropriately and follow the principle of "small amount multiple times".
Balanced fertilization: In addition to large amounts of elements such as nitrogen, phosphorus, and potassium, spinach growth also requires an appropriate amount of trace elements such as iron, boron, calcium, etc. Therefore, when fertilizing, it is important to pay attention to the reasonable combination of trace element fertilizers to meet the needs of spinach growth.
Soil fertility monitoring: Regularly monitor the fertility of the soil, understand the content of various nutrients in the soil, adjust the fertilization plan based on the monitoring results, and achieve precise fertilization.
