Tomato fertilization precautions

In order to make tomatoes grow healthily, fertilization is a very important link, so how can we do it well?

Tomato fertilization introduction:

In tomato production, tomatoes should be fertilized in a formula. The production of 100 kg of tomatoes requires 0.4 kg of nitrogen, 0.45 kg of phosphorus, and 0.44 kg of potassium. Based on an output of 5,000 kg per mu, 2,000 kg of high-quality organic fertilizer, 15 kg of ammonium sulfate, 50 kg of superphosphate, and 15 kg of potassium sulfate should be applied to the seedlings as base fertilizer before transplanting. When the first bunch of fruits swells to the size of eggs, the first topdressing should be carried out, and 18 kg of ammonium sulfate, 15 kg of superphosphate, and 16 kg of potassium sulfate should be applied to the seedlings. When the third and fourth bunches of fruits swell to the size of eggs, "fruit fertilizer" should be applied in stages and in a timely manner. At this time, the fertilizer demand is large, and the amount of fertilizer applied should be appropriately increased. 29 kg of ammonium sulfate, 18 kg of superphosphate, and 20 kg of potassium sulfate should be applied per mu each time.

The following principles should be followed during the planting process:

1. Based on soil fertility conditions and comprehensive consideration of environmental nutrient supply, appropriately reduce the amount of nitrogen and phosphorus fertilizers used.

2. In old vegetable sheds, pay attention to applying more compost containing more straw, and less poultry manure such as chicken manure and duck manure. This can restore soil fertility, replenish carbon dioxide in the shed, and is also beneficial for desalination and alleviating obstacles to continuous cropping.

3. In early spring, the temperature is low and the supply of soil nutrients is slow, so topdressing should be carried out in the early stage. After May, reduce the use of nitrogen fertilizer and increase the use of potassium fertilizer. In early autumn, the temperature is high and the soil has a strong ability to supply organic nutrients, so control is the main focus and do not apply topdressing.

4. It is recommended that fertilization should be closely combined with reasonable irrigation. It is recommended to use sub-film furrow irrigation, drip irrigation, etc. The irrigation area per mu should not exceed 30 square meters each time, and the sandy soil should not exceed 22 square meters.

5. For tomatoes that grow over the winter, you can use the summer break to plant sweet corn, implement reasonable crop rotation, and overcome the obstacles of continuous cropping.