The growth cycle of cauliflower can be divided into the germination period, seedling stage, rosette stage, flower bulb growth stage, bolting stage, flowering stage and fruiting stage. In the cauliflower seedling stage, nitrogen is mainly concentrated in the leaves, and potassium is concentrated in the stems and petioles. 40 to 60 days after transplanting is the transition period from vegetative growth to reproductive growth of broccoli, at which time the growth rate of flower bulbs is accelerated, and the accumulation of nitrogen, phosphorus, and potassium is turned to flower bulbs. Cauliflower needs less nutrients at the seedling stage, and the nutrient content of the nutrient soil should be paid attention to when raising seedlings. High-quality farmhouse fertilizers should be used, and more nutrients are needed during vigorous growth and product formation. Organic fertilizers and phosphate fertilizers are generally used as basal fertilizers before broccoli sowing and planting. Available nitrogen and potassium fertilizers can be top-dressed in the middle of broccoli growth. First, apply base fertilizer Each mu of high quality farmyard fertilizer 3000 ~ 5000 kg, ammonium sulfate 20 ~ 30 kg, 35 ~ 40 kg of superphosphate, potassium and magnesium fertilizer 25 kg, borax 2 kg, potassium sulfate 15 ~ 25 kg. After mixing chemical fertilizers with farmyard fertilizers, 60% of the fertilizers are applied to the earthworms, and the remaining 40% are applied to the ditch or hole when transplanted. Second, soil dressing Cauliflower is top dressing 2 to 3 times from transplanting to harvesting. The first top dressing should be timely fertilized and watered when the diameter of the curd is 3 to 5 cm, and 15 kg of ammonium sulfate is applied per mu. 2 The second topdressing should be carried out at a time when the diameter of the flower bulb is 5 to 8 centimeters, followed by application of about 400 kilograms of decomposed dry manure or chicken manure and watering. When the diameter of the buds reaches 12-13 cm, the third fertilizer is applied. If there is too much rain, it should be applied in combination with potash fertilizer. Apply 15 kg of potassium sulfate or 45% of compound fertilizer 20-25 kg per mu. Third, foliar spray fertilizer Plants rely primarily on roots to absorb nutrients, and leaves and shoots can also directly absorb nutrients from solutions that are sprayed on their surfaces. During the flowering of broccoli, appropriate spraying of 0.3% potassium dihydrogen phosphate and 0.1% borax solution was sprayed for 7 to 10 days, and the spray was sprayed 3 times for a significant increase in yield. Or in the early stage of flowering, topdressing, earth-cultivation, weeding and stripping of yellow leaf, spraying the entire plant with 0.5% boric acid solution 1 or 2 times to improve the quality of the flower bulb; when 50% to 60% of the plants When the bulb is formed and reaches a diameter of 5 cm or more, it is sprayed once with a 0.5% urea solution and then sprayed once every 7 to 10 days. Fourth, pay attention to matters 1. Formulated fertilization. Mainly organic fertilizer, supplemented by chemical fertilizers and trace element fertilizers, vigorously strengthen formula fertilization. Top dressing should focus on nitrogen fertilizer for leaf fertilizer, phosphate fertilizer for fruit fertilizer, and potash fertilizer for root fertilizer. If only one fertilizer is used, the overall growth of broccoli will be adversely affected. 2. Scientific nitrogen application. When broccoli lacks nitrogen fertilizer, the stems and leaves of the plants are narrow and the color of the leaves is yellow, and the yield and quality are reduced. When the nitrogen fertilizer is sufficient, the plants grow lushly, the leaves are dark green and high in yield. However, over-application of nitrogen fertilizer can also lead to a dramatic increase in nitrate content in the vegetables, which is prone to pests and diseases. In addition, the last topdressing of broccoli with nitrogen fertilizer until the product is marketed must have a safe interval, and should be available on the eighth day after the last application of nitrogen fertilizer. 3. Prevent boron and magnesium deficiency. Cauliflower is sensitive to elements such as boron and magnesium. When it is deficient in boron, it causes the center of the flower stem to crack, and the flower ball appears brown with a bitter taste. In the absence of magnesium, the leaves curl and the growth is slow. Takoyaki Machine,Fish Grill,Electric Fish Grill,Gas Fish Grill Guangzhou New Power Catering Equipment Manufacturing Co.,Ltd , https://www.gznewpower.com