If immediately after the planting of tomato seedlings the main emphasis was placed on the development of the root system and the containment of the active growth of the plant (fattening), then with the advent of the first green fruits, the strategy of feeding tomatoes changes dramatically.
Today, an experienced tomato grower, Yuri Kuzminykh, will tell you that of the nutrients you definitely need tomatoes at each of these stages.
As you remember, at the first stage we tried to provide the plant with a large amount of phosphorus for the growth of the root system, and nitrogen was added as a fertilizer only in a small dosage (the ratio of nitrogen to phosphorus can be approximately set as 1: 4). We did everything correctly - it was necessary to prevent the tomato from growing tops strongly, and quickly form a good root system and set up the plant for early fruiting.
How to feed tomatoes during and after flowering
From the beginning of flowering and until the formation of 3-4 brushes, a new phase of development of tomato plants begins. Now all efforts should be directed to the development of a powerful vegetative mass, because when the fruits begin to actively form, their need for nutrients will significantly reduce the availability of food for the growth and development of the plant itself.
The more the vegetative mass develops, the more fruit clusters will start and the greater will be the harvest. Tomato begins a very difficult stage, and without our help the plant will be difficult. New green fruits are growing all the time, flower brushes are forming that should tie new fruits.
And all this needs as much power as possible. Now as a top dressing you need a large amount of humus. And yet - abundant watering, which we artificially restrained in the first phase for the full development of the roots.
Together with the saturation of the soil moisture should increase and the introduction of nitrogen. Phosphorus is the same and potassium will need about half as much as nitrogen.
Do not forget about boron. Look - flower brushes appear on the plant, as it should be, on time, the flowers bloom, pollen is poured out on the pistil stigma, and then ... Then, with a lack of boron, nothing happens - the pollen does not mature, and the flower turns out to be sterile, fade, dry and just fall off. I think everyone watched this picture. So do not forget about this important element.
And, of course, it is from this moment that calcium is also actively included in the nutrition of tomatoes. In the tissues of the plant, it participates in a variety of processes, and also contributes to the prevention of vertex rot. It is better to give calcium to tomatoes on a leaf, although it is possible even at the root, but it is possible - alternating these two methods, since this element reluctantly rises up the stalk.
Of course, you will need a plant and a whole range of trace elements, and add boldly - it will choose what it needs.
I want to pay special attention to molybdenum. It is used in small quantities, goes well in conjunction with boron (they are included in the composition of complex fertilizers). The fact is that in the presence of molybdenum nitrogen absorption occurs many times more actively.
Remember about plant protection. I will definitely add useful bacteria and supplements to them (for example, I use Fitosporin, HB-101, Stimix and other similar preparations). Let better useful microflora live on the leaves, than stray pathogens.
Fertilizers for the formation of tasty and beautiful fruits
I have already mentioned that the development of a plant is like an intrauterine development of an infant. The point is that the formation of new organs and systems goes week after week. At the same time, any infection can lead to a development failure, which will affect the overall health of the body in the future.
In tomato, something similar can be observed when a certain number of cells characteristic of the variety are formed at the time of tying. Then these cells begin to grow and stretch, fill with juice - as a result we get a tasty and juicy tomato.
All this occurs during normal development, but disturbances at any stage of the formation of the fetus can lead to a change in the quality of tomatoes.
Here there are three important stages in the formation of the fetus, and in each certain nutrients play a crucial role.
1. The formation of the ovary and the laying of fetal cells. At this stage, boron is important, which contributes to the germination of pollen, the establishment of seeds, as well as the even distribution of calcium in the fruit. As a rule, all violations of the structure of the ovary occur at a later period (after the formation of the third hand). Natural features are to blame for this: heat, heavy rains, sharp fluctuations in temperature.
2. Growth and stretching of fetal cells. Here, boron and calcium contribute to the even distribution of water and nutrients between the cells of the fetus. Calcium helps to form stronger cell walls.
3. Filling cells. At this point, there is an outflow of food from the leaves into the fruit. The accumulated food is moved to the place of ripening seeds (fruit).
At this stage, potassium, magnesium, boron and phosphorus contribute to improving the transport of plastic substances from the leaves to the fruit, increasing their sugar content and dry matter. The more sugar and nutrients accumulate in the fruit, the more weight, juicier the taste, brighter the color of the fruit, better keeping quality and transportability, less accumulation of nitrates.
Of course, all these processes take place in the usual (automatic) mode. And if the weather conditions are normal, the fruits calmly form. All failures begin when the natural conditions change, and at these moments we must help the tomato to feed it properly and in time.
- boron is better to “deliver” to a plant on a leaf (fertilizer such as Mag-Bor and others like it);
- Calcium, which rises poorly up the stems - also on the leaf (for example, calcium nitrate);
- phosphorus in complex fertilizers - on the sheet, but can also be in the form of superphosphate at the root.
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