1. The base fertilizer is applied to the high-quality farmyard manure twice acre. 2. The production level is above 6500 kg/mu: nitrogen fertilizer (N) 18~20 kg/mu, phosphate fertilizer (P2O5) 8~10 kg/mu, potash fertilizer (K2O) 14~16 kg/mu. 3. The production level is 5500~6500 kg/mu: nitrogen fertilizer (N) 15~18 kg/mu, phosphate fertilizer (P2O5) 6~8 kg/mu, potash fertilizer (K2O) 12~14 kg/mu. 4. The production level is 4500~5500 kg/mu: nitrogen fertilizer (N) 13~15 kg/mu, phosphate fertilizer (P2O5) 4~6 kg/mu, potassium fertilizer (K2O) 8~10 kg/mu.
For the more serious plots of “dry heartburn†in previous years, pay attention to nitrogen and calcium supplementation, and spray 0.3%~0.5% calcium chloride (CaCl2) solution 2~3 times from the rosette stage to the late stage of the ball formation; When the soil pH of the vegetable garden is less than 5, 100-150 kg of quicklime is applied per acre; when the soil pH is <4.5, 150-200 kg of quicklime is applied per acre. For the boron-deficient plots, 0.5~1 kg/mu of borax may be applied, or 0.2%~0.3% of borax solution may be sprayed 2~3 times. At the same time, it can be sprayed with spraying 2~3 times of 0.5% potassium dihydrogen phosphate to increase the vegetable yield and commodity rate of cabbage. Nitrogen and potassium fertilizer 30%~40% base application, 60%~70% in the rosette stage and the initial stage of ball formation, and the phosphate fertilizer is used as the base fertilizer or hole application.
When growing high-yield crops, especially cabbages, proper fertilization is essential for ensuring healthy growth and maximum productivity. One of the key steps is the application of base fertilizer, typically using high-quality farmyard manure at a rate of two acres. This provides a solid foundation for nutrient availability throughout the growing season.
Depending on the desired yield level, the amount of nitrogen (N), phosphate (P2O5), and potash (K2O) should be adjusted accordingly. For fields aiming for yields above 6,500 kg per mu, it's recommended to apply approximately 18–20 kg of N, 8–10 kg of P2O5, and 14–16 kg of K2O. If the target is between 5,500–6,500 kg per mu, then 15–18 kg of N, 6–8 kg of P2O5, and 12–14 kg of K2O are appropriate. For lower yields, such as 4,500–5,500 kg per mu, the quantities decrease further to around 13–15 kg of N, 4–6 kg of P2O5, and 8–10 kg of K2O.
In cases where "dry heartburn" has been observed in previous seasons—often caused by a lack of nitrogen and calcium—it’s important to supplement these nutrients. A 0.3%–0.5% calcium chloride (CaCl2) solution can be sprayed 2–3 times during the rosette stage and later stages of head formation. Additionally, if the soil pH is below 5, applying 100–150 kg of quicklime per acre helps neutralize acidity. In more acidic conditions, with pH below 4.5, the lime application should increase to 150–200 kg per acre.
Boron deficiency is another common issue that can affect crop quality. To address this, 0.5–1 kg of borax per mu can be applied directly, or a 0.2%–0.3% borax solution can be sprayed 2–3 times. Alongside these measures, applying 0.5% potassium dihydrogen phosphate 2–3 times can significantly improve both yield and marketability of the cabbages.
Nitrogen and potassium fertilizers are best applied as 30%–40% base fertilizer, with the remaining 60%–70% applied during the rosette stage and early head formation. Phosphate fertilizer is often used as a base fertilizer or incorporated into the soil through hole application to ensure even distribution and better root absorption.
By following these guidelines, farmers can optimize their fertilizer use, reduce environmental impact, and achieve healthier, more productive crops. Proper planning and timely application of nutrients are crucial for sustainable agriculture and long-term soil health.
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