Requirements for Fertilizer Application of Six Special Vegetables

1. Green cauliflower. In fertilizer nutrients, nitrogen and phosphorus are most needed in the whole growth period, especially in the bulbous expansion stage, and potassium fertilizer is required after flower bud differentiation. Among the trace elements, boron and molybdenum are most needed. The production of 1000kg of green cauliflower requires 2.5kg of pure nitrogen, 1.2kg of phosphorus pentoxide and 2.9kg of potassium oxide. Before planting, apply organic fertilizer 2500kg per 667 square meters, bio-organic compound fertilizer 100kg, urea 50kg, superphosphate 20 ~ 25kg, potassium sulfate 30kg. In the rosette period, the first topdressing was performed, applying 4 kg of pure nitrogen per 667 square meters, and 6 kg of potassium oxide. The second time the rosette was top dressing, 2.5 kg of pure nitrogen was applied per 667 square meters, and 4 kg of potassium oxide. In the initial stage of bulb formation, 0.2% to 0.5% borax can be sprayed from the roots. 2. Cherry tomatoes. In addition to nitrogen, phosphorus and potassium fertilizers, pay attention to calcium and boron fertilizers. The production of 1000kg cherry tomatoes requires 3.85kg of pure nitrogen, 1.15kg of phosphorus pentoxide and 4.44kg of potassium oxide. Before planting, 5000 kg of organic fertilizer per 667 square meters, 200 kg of bio-organic compound fertilizer, 50 kg of urea, 30-50 kg of superphosphate, 40 kg of potassium sulfate, 100 kg of calcium fertilizer, and 1.5 kg of borax. Generally, when the first panicle begins to enlarge, the first topdressing can be performed with 5 kg of pure nitrogen per 667 square meters and 6 kg of potassium oxide. The second topdressing is to be harvested in the first ear, and when the second ear is enlarged, 5kg of pure nitrogen is applied per 667 square meters and potassium oxide is 6-7kg. The third dressing is harvested in the second ear, and when the third ear is swollen, 4 kg of pure nitrogen is applied per 667 square meters and potassium oxide is 5-6 kg. 3. Colorful peppers. The growth of Capsicum annuum requires sufficient nutrient conditions. The production of 1000kg of colorful pepper requires 4.2kg of pure nitrogen, 1.2kg of phosphorus pentoxide, and 6.5kg of potassium oxide. At the same time, it also needs an appropriate amount of calcium fertilizer. Before planting, apply organic fertilizer 4500kg per 667 square meters, bio-organic compound fertilizer 150kg, urea 50kg, superphosphate 25kg, potassium sulfate 50kg, calcium fertilizer 100kg. When the seedlings are over and the first ear grows to the size of the walnut, the first topdressing is performed, applying 5 kg of pure nitrogen per 667 square meters, and 6 kg of potassium oxide. When entering the first ear fruit (Jian pepper) is about to be harvested, the second layer of fruit (for pepper) and the third layer of fruit continue to expand and the third layer of fruit is falling for fruit setting, it is the peak period of requirement fertilizer and should be reused. The top-dressing fertilizer applied 6kg pure nitrogen per 667m2 and potassium oxide 7-8kg. The third topdressing was performed about two weeks later and the amount of fertilizer was the same as the second. After 15 to 20 days, the fourth topdressing was performed with the same amount of fertilizer applied for the first time. 4. No thorn cucumber. The thorny cucumber was hi-fertilized and the organic nitrogen fertilizer was applied at the same time as the application of NPK fertilizer. Increasing molybdenum fertilizer can increase vitamin content in fruits and reduce nitrate and nitrite content. The production of 1000kg barbed cucumber requires 2.6kg of pure nitrogen, 1.4kg of phosphorus pentoxide, and 3.5kg of potassium oxide, of which the required amount of fertilizer accounts for more than 80% of the total fertilizer requirement. Before the planting, 5000 kg of organic fertilizer was applied per 667 square meters, 250 kg of biological organic compound fertilizer, 60 kg of urea, 30-40 kg of superphosphate, and 50 kg of potassium sulfate. In the early stage of fruiting, the topdressing fertilizer was applied for 1 to 3 kg per 667 square meters of pure nitrogen and 4 to 6 kg of potassium oxide. In the early stage of the harvest, the first time, the topdressing fertilizer was applied to 3 to 4 kg of pure nitrogen per 667 square meters and 5 to 6 kg of potassium oxide. In the middle of the melon period, the 3rd top-dressing fertilizer was applied, and 3 to 4 kg of nitrogen was applied per 667 square meters, and potassium oxide was 5 to 6 kg. Spray 0.02% to 0.05% ammonium molybdate at full fruit stage. 5. Dutch beans. During the seedling stage, nitrogen fertilizer was applied to supplement the phosphorus and potassium fertilizers during the growth period, and molybdenum and manganese fertilizers were added. The production of 1,000 kg of Dutch beans requires 2.4 kg of pure nitrogen, 0.8 kg of phosphorus pentoxide and 5.7 kg of potassium oxide. Before sowing, apply organic fertilizer 2500kg per 667 square meters, bio-organic compound fertilizer 100kg, urea 20kg, superphosphate 25 ~ 30kg, potassium sulfate 40kg, manganese sulfate 0.5 ~ 1kg. Into the extension of the cranberry period, the first topdressing, application of pure nitrogen 3kg per 667 square meters, potassium oxide 4 ~ 6kg. During the flowering and seedling stage, the second topdressing was performed, applying 2 to 2.5 kg of pure nitrogen per 667 square meters, and 3.5 kg of potassium oxide. Spraying 0.02% to 0.05% ammonium molybdate during flowering. 6. American celery. In addition to nitrogen, phosphorus and potassium, celery's demand for boron is greater. Applying zinc fertilizer can reduce nitrate and nitrite content in fresh vegetables. The production of 1000kg of celery requires 2.0kg of pure nitrogen, 0.93kg of phosphorus pentoxide and 3.9kg of potassium oxide. Before planting, apply 4,000 to 5000 kg of organic fertilizer per 667 square meters, 150 kg of bio-organic compound fertilizer, 40 kg of urea, 25 to 35 kg of superphosphate, 40 kg of potassium sulfate, and 1 to 1.5 kg of zinc sulfate. The plants entered a vigorous growth period and the first topdressing was performed, applying 3 kg of pure nitrogen per 667 square meters, and 5 to 6 kg of potassium oxide. After entering the second top dressing in two weeks, pure nitrogen was applied to 2 to 2.5 kg per 667 square meters, and potassium oxide was 4 to 5 kg. Strong growth phase can be sprayed with 0.2% to 0.5% borax.

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