The reason why tomatoes are not big is why:
I. Varieties: There is little difference in the size of each fruit in some varieties. These varieties are suitable for long-term harvesting, and the results can reach 17, 18 or even 20 fruits. Generally, these seeds are more expensive. Another common and popular variety, each fruit is smaller than the previous one, that is, the smaller the fruit is. This kind of variety is suitable for cultivation in a short harvest period. Generally, 3-4 sets of fruit are knotted. After that, the head must be steamed. Generally, 3-4 fruits are left per ear.
Second, the fertilizer: the lack of all kinds of essential elements of the plant will cause the fruit to become smaller, the lack of magnesium, manganese, boron may affect the size of the fruit. In addition, the improper application of fertilizers will also affect the size of the fruit. For example, if a large amount of ruminant feces is applied and no large amount of nitrogen is applied, the crop will be deficient in nitrogen. Excessive and frequent application of large amounts of diammonium causes phosphorus poisoning in crops and the fruit will become smaller. The correct application method of potassium fertilizer is to apply in several stages. If it is put in one time, the crop will be reduced, and the same amount will be divided into three times (the first time is less), and the yield increase is large. Excessive amounts of some elements, such as boron spray, can also make the fruit smaller.
Third, cultivation aspects: 1. No frame, plant lodging; 2. The latter type of species did not go head; 3. Water shortage; 4. Soil over stiff; 5. Auxin poisoning - this is the most common fruit in the greenhouse The reason for the smaller (one layer of flowers per point, the auxin accumulates a little, the fruit after three or four sets of fruit is affected), should be corrected once every three to four after gibberellin.
Tomatoes are not a big solution:
Before planting from greenhouse tomatoes to flowering, the plant growth was small, the demand for nitrogen fertilizer was low, and the nitrogen fertilizer applied in the soil could fully meet the needs of tomato plant growth. Therefore, it is not necessary to apply nitrogen fertilizer during this period.
From the greenhouse tomatoes into the flowering period, as the temperature rises, the growth rate of the plants increases, and the growth amount increases. At this time, it is necessary to start to apply nitrogen fertilizer to ensure the nutrient supply of the tomatoes. When the first spike flower is opened, about 20-25 kg of nitrogen fertilizer can be applied per acre, and the application of potassium fertilizer can be combined to promote the normal growth of the tomato. From the first panicle of the tomato to the fourth panicle of the tomato, the transpiration of the tomato is increased due to the gradual increase of the temperature, and the interval of the watering is gradually shortened, so the nitrogen fertilizer applied per time cannot be excessive. Reduce the loss of nitrogen fertilizer with water. It is also possible to apply water-soluble flushing fertilizer every time watering, and it is advisable to reduce the amount of application. In the fruiting period of tomato flowering in the greenhouse, the fruit is fertilized to enhance the pollen fertilization quality, and the cycle fruit set rate is strong, promoting fruit development, no deformity, no empty shell, no glutinous grains, good uniformity, improved quality, and continuous fruit and vegetable. High yield.
When the tomatoes enter the picking period, the demand for nitrogen is reduced. At this time, the amount of nitrogen fertilizer can be reduced to about 15 kg, so that the demand for nitrogen fertilizer can be satisfied by the tomato color change, but attention should be paid to increasing the application amount of potassium fertilizer.
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