A detailed explanation of the latest key fertilization points for off-season vegetables

When growing vegetables off-season, it is not only necessary to have good hardware such as greenhouses and solar greenhouses; fertilization techniques are also very important. There is still a slight difference between fertilization methods for off-season vegetables and seasonal fertilization. Below, let's take a look with the editor at the key fertilization points for off-season vegetables.

1. Determine the economically optimal fertilizer rate

Determining the economically optimal fertilizer rate is premised on meeting the needs of the vegetables and is calculated according to the market yield level and soil fertility level. For example, when soil nutrients can meet the needs of the vegetables, in order to ensure fertilizer supply intensity, the fertilizer rate can be calculated at 20%-40% of the vegetable yield. When fertilizing, chlorine-based fertilizers are generally not chosen, and volatile nitrogen fertilizers should not be used. Nitrate nitrogen should be controlled as much as possible. For vegetables with a short growing period or those harvested for roots, stems, and leaves, 12%-13% of the nitrogen fertilizer, all of the phosphorus, potassium, and trace fertilizers can be used as base fertilizer, and nitrogen fertilizer can be used as topdressing and applied in split applications during the peak growing season.

2. Apply organic fertilizer heavily

Choose thoroughly decomposed high-quality organic fertilizer and apply it as base fertilizer one month before covering the greenhouse. The usual application rate is 1-1.5 times that of open fields. At the same time, carry out deep plowing year by year, thicken the plow layer, and improve soil structure. In order to prevent ammonia gas and nitrous acid gas poisoning, organic fertilizer must be thoroughly decomposed when applied, especially chicken manure. Farmyard manure must strictly not be piled inside the greenhouse for a long time. Organic fertilizer can be used together with inorganic fertilizer, or part of the inorganic fertilizer can be set aside for foliar spraying, which is more economical and cost-effective.

3. Solve salt damage

For plots where salt damage has already occurred, it can be solved by planting salt-tolerant vegetables such as cabbage, spinach, pumpkin, celery, and cauliflower, or by using high-quality organic fertilizer. In addition, changing the soil to remove salt or flooding the field with water is also very effective.

  The above is an introduction to the key fertilization points for off-season vegetables. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.