Spinach planting techniques: how to fertilize spinach?

How to fertilize spinach? How many times does it take to fertilize spinach? Please introduce that spinach cultivation is divided into spring spinach, summer spinach, autumn spinach and overwintering spinach, and the fertilization methods for vegetables grown in different seasons are different. Detailed methods can be listed below: spinach fertilizer is divided into basal fertilizer and topdressing fertilizer. First, spring spinach is sown early, and soil preparation fertilizer can be applied last year. Every 667 square meters, 4000 kilograms of rotten organic fertilizer is applied, 20 centimeters deep, and rake flat to make the bed. When the soil is thawed in early spring, it can be sown at a depth of 7cm to 10cm. Compost and chemical fertilizer can be mixed and applied as base fertilizer. Every 667 square meters, 3000 kilograms of compost, 35 kilograms of superphosphate, 20 kilograms of ammonium sulfate, 10 kilograms of potassium sulfate, 20 kilograms of deep ploughing and 25 centimeters of rake shall be applied. Autumn spinach every 667 square meters of organic fertilizer 4000kg, calcium superphosphate 25kg 30kg, deep ploughing 20cm, to make high or flat beds. The overwintering spinach chooses the soil with deep soil layer, fertile soil, high humus content and good performance of fertilizer and water storage, and should apply more organic fertilizer than other seasons. 5000 kg of mature organic fertilizer, 25 kg of superphosphate and 20 cm of deep ploughing can be applied per 667m2, so that the soil fertilizer is fully mixed, the soil is loose, and the emergence of seedlings and root development are promoted. Second, topdressing spring spinach in the early growth stage, generally do not need to fertilize water, in order to facilitate the absorption of nutrients in the soil. In the middle and later stages of growth, the amount of fertilizer absorbed will be increased, and ammonium sulfate can be applied 15 kilograms per 667 square meters. Due to the short growth period of spring spinach, sufficient nitrogen fertilizer can make the leaves grow vigorously and delay the bolting period. Summer spinach was sown in high temperature season. After 2-3 true leaves appeared, quick-acting nitrogen fertilizer was applied twice, and ammonium sulfate was applied 10-15 kg per 667 square meters, and then watered in time after fertilization. Additional nitrogen fertilizer can also be sprayed with 0.3% urea foliar. After the autumn spinach seedlings are unearthed, when they grow to 4 or 5 true leaves, the available nitrogen fertilizer should be applied for 2 or 3 times by stages. Ammonium sulfate 20kg / 667 square meters or urea 10kg / 667 square meters was applied to promote leaf thickening and growth, increase yield and improve quality. Because of the longer growth period, overwintering spinach should be fertilized, which can be divided into three stages: pre-winter, overwintering and early spring. The growth period before winter is about 50 to 60 days, and fertilizer is applied once in combination with irrigation, 10 kilograms of ammonium sulfate is applied every 667 square meters. When pouring "frozen water", 1000-1500 kg of dilute dung water was applied. There is no need for topdressing during the period when overwintering stops growing. During the growth period of 30-40 days in early spring, when the spinach leaves turn green and the heart leaves begin to grow, they can be watered once. Spinach into the vigorous growth period, should be timely topdressing, combined with watering mu of ammonium sulfate 10-15 kg. Adequate supply of fertilizer and water in this period can delay bolting, increase yield and improve quality. Click to get more spinach planting techniques click to get more vegetable planting techniques