The yield per mu of tomatoes grown in greenhouses generally depends on factors such as their own management level, cultivation methods, cultivar varieties, etc. The average yield per mu of self-capped open-air cultivation is 3000-4000 kilograms. , Infinite growth greenhouse cultivation generally has a yield of 100,000-12,000 kilograms per mu. When growing tomatoes in a greenhouse, the amount of nitrogen and phosphorus fertilizers should be appropriately reduced based on soil fertility conditions and comprehensive consideration of environmental nutrient supply.

1. How many kilograms of tomatoes are produced per mu in greenhouses?

1. The yield per mu of tomatoes grown in greenhouses generally depends on factors such as their own management level, cultivation methods, and cultivated varieties. Self-capping open-air cultivation generally yields 3,000-4,000 kilograms per mu, and self-capping greenhouse cultivation generally yields 5,000-7,000 kilograms per mu. The general yield per mu of unlimited-growth open-air cultivation is 4,000-6,000 kilograms, and the general yield per mu of unlimited-growth greenhouse cultivation is 100,000-12,000 kilograms.

2. When planting tomatoes in greenhouses, we should consider the fertility conditions of the soil, comprehensively consider the supply of environmental nutrients, and appropriately reduce the amount of nitrogen and phosphorus fertilizers. The temperature in early spring is low and the supply of soil nutrients is slow. Topdressing in the early stage must keep up, in May. In the future, reduce nitrogen fertilizer and increase the use of potassium fertilizer. In old vegetable sheds, pay attention to applying more compost containing more straw and less duck manure, chicken manure and other poultry manure. This can restore soil fertility and replenish carbon dioxide in the shed. For tomatoes that survive the winter and have long stubble, sweet corn can be planted during summer leisure to achieve a reasonable crop rotation and overcome the obstacles of continuous cropping.

2. Water management for planting tomatoes

1. After planting, watering should be controlled during the seedling-slowing period and after the seedling-slowing period until the first spike of flowers. Do not water lightly before flowering to prevent flower drop and prevent vigorous growth. Water less during drought to promote flowering, fruit setting and prevent flower drop.

2. From the first inflorescence to the third inflorescence, watering should be strictly controlled to promote the root system to develop deeper into the soil. Unless the growing points wilt at noon, watering can only be done along the ditch. Little water. If there is too much water during this period, it will easily cause the plants to grow taller and leggy, cause flowers to drop, and make it difficult to set fruits.

3. After the third inflorescence blooms, the first ear of fruit enters the expansion stage. At this time, watering begins. Watering should be done under the film, and the amount of water should be sufficient. Sufficient water can ensure the normal growth of stems and leaves, promote the development of fruits, and promote fruit enlargement.

4. In the cold season, when the light is weak and the temperature is low, fruit growth and plant growth are slow, so watering must be properly controlled. In the warming phase after mid-February, the temperature gradually rises, the growth of fruits and plants accelerates, and the water demand gradually increases. Choose to water in the morning on a sunny day, and gradually increase the frequency of watering. Water once every 15-20 days in spring. , master the principle of "watering the fruits but not the flowers" to prevent the fruit setting rate from being reduced.