Soil testing and formula fertilization technology for greenhouse vegetables (2)
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1. Cabbage Fertilization Technology The production of 1000 kg of cabbage requires 1.6 kg of pure nitrogen, 0.8 kg of phosphorus pentoxide, and 1.8 kg of potassium oxide. 0.5 to 10,000 kg of cabbage per mu requires 8 to 16 kg of pure nitrogen, 4 to 8 kg of phosphorus pentoxide, and 9 to 18 kg of potassium oxide. Before the sowing of cabbage, 5,000 kg of organic fertilizer and 25 to 50 kg of phosphate fertilizer were applied. Cabbage enters the rosette stage for the first top dressing, applying 3-6 kg of pure nitrogen and 3-6 kg of potassium oxide. The second top dressing is carried out at the beginning of the ball or the top of the heart. The pure nitrogen is 3-6 kg and the potassium oxide is 3-6 kg. In the middle of the ball or the center of the heart, the third top dressing is applied, and the pure nitrogen is 2 to 4 kg, and the potassium oxide is 3 to 6 kg.
2. Cabbage fertilization technology produces 1000 kg of cabbage, which requires 2.0 kg of pure nitrogen, 0.72 kg of phosphorus pentoxide, 2.2 kg of potassium oxide, 3,000 to 5,000 kg of cabbage, and 6 to 10 kg of pure nitrogen and 2.2 to 3.6 kg of phosphorus pentoxide. Potassium oxide 6.6 ~ 11 kg. Before planting cabbage, 2,500 kg of organic fertilizer and 20 to 25 kg of phosphate fertilizer were applied. Cabbage enters the rosette stage for the first top dressing, applying 36 kg of pure nitrogen and 3.3-5.5 kg of potassium oxide. Enter the cabbage period, carry out the second top dressing, apply 3 to 6 kg of pure nitrogen and 3.3 to 5.5 kg of potassium oxide.
3. Tomato Fertilization Technology The production of 1000 kg of tomatoes requires 3.86 kg of pure chlorine, 1.15 kg of phosphorus pentoxide, and 4.44 kg of potassium oxide. The yield of 4,000-5,000 kilograms of tomatoes per mu requires 15.4 to 19.3 kg of pure nitrogen, 4.6 to 5.8 kg of phosphorus pentoxide, and 17.8 to 22.2 kg of potassium oxide.
Before planting tomatoes, apply 5,000 kg of organic fertilizer and 30-50 kg of phosphate fertilizer. Generally, when the first ear fruit begins to expand to the size of table tennis, the first top dressing can be carried out, and the pure nitrogen is 5-6 kg, and the potassium oxide is 6-7 kg. The second top dressing is in the first time when the ear is about to be harvested. When the second ear is swollen to the size of the table tennis, the pure nitrogen is 5-7 kg and the potassium oxide is 6-8 kg. The third top dressing is about to be harvested in the second ear, and when the third ear is swollen to the size of the table tennis, the pure nitrogen is 5-6 kg and the potassium oxide is 6-7 kg.
4. Sweet pepper fertilization technology The production of 1000 kg of sweet pepper requires 5.2 kg of pure nitrogen, 1.1 kg of phosphorus pentoxide and 6.5 kg of potassium oxide. The yield of sweet pepper is 4000-5000 kg, and the phosphate fertilizer is 30-40 kg. When the seedlings are over and the first ear is grown to the size of the walnut, the first top dressing is carried out, and the pure nitrogen is 5-6 kg and the potassium oxide is 6-8 kg. When entering the first ear fruit (men pepper) is about to be harvested, the second layer of fruit (for pepper) and the third layer of fruit (four mothers) continue to expand and the third layer of fruit is falling, the peak of fertilizer demand The second top dressing should be applied again, applying 6-7 kg of pure nitrogen and 7-8 kg of potassium oxide. The third top dressing was carried out about half a month later, and the amount of fertilizer applied was the same as the second time. After 15 to 20 days, the fourth top dressing was carried out, and the amount of fertilizer applied was the same as the first time.
5. Fertilization technology of eggplant The production of 1000 kg of eggplant requires 3.2 kg of pure nitrogen, 0.94 kg of phosphorus pentoxide and 4.5 kg of potassium oxide. The yield of eggplant is 4000-5000 kg per mu, and it requires pure hydrogen 12.8 kg to 16 kg, phosphorus pentoxide 3.8-4.7 kg, and potassium oxide 18-22.5 kg. Before the planting of the eggplant, the organic fertilizer is 5000 kg and the phosphate fertilizer is 25-35 kg. When the “door eggplant†reaches the “eye-opening period†(called “blinking eye†when the ovary expands to expose the flower bud after fertilization), the fruit begins to grow rapidly. At this time, the first top dressing is applied, and the pure nitrogen is applied for 4 to 5 kg. Potassium 6 to 7 kg. When the "toxin" fruit is inflated, the "four-mother bucket" begins to develop, which is the peak of eggplant fertilizer. After the second top dressing, the application of pure nitrogen is 5-6 kg and the potassium oxide is 6-8 kg. Half a month after the second top dressing, the third top dressing was carried out, and the amount of fertilizer applied was the same as the first time.