Fertilizer Management Techniques for Open-tomatoes

The tomato planting area is large and the planting area is also very wide. The life of a tomato is divided into germination, seedling and fruiting.
The germination period starts from the germination of the seeds to the development of the cotyledons until the first true leaves are revealed.
The seedling stage reveals from the true leaves to the first inflorescence. This period is the parallel period of vegetative growth and reproductive growth. Under conditions of adequate light, good ventilation, and complete nutrition, age-appropriate seedlings can be cultivated.
Flowering results from the buds of the first inflorescence to fruit harvesting. It is divided into the beginning flowering period and the flowering period. The beginning of the fruiting period: from the bud emergence to the fruit set, the transition from vegetative growth to reproductive growth is the main stage; the flowering period is prosperous: from the first inflorescence to the fruit harvest, it is the main production period.
The absorption of nutrients in the early period of growth is small. From the beginning of the first inflorescence, the absorption of nutrients increases rapidly, and the absorption of nutrients during the full fruit period can account for 70-80% of the total absorption. The absorption of nitrogen, phosphorus and potassium in tomato showed a linear upward trend. The absorption of potassium was close to double that of nitrogen. The absorption of calcium was similar to that of nitrogen. Because the "tianji" brand phosphorus nitrate (potassium) fertilizer contained calcium, Prevent pedicle rot.
Fertilizing techniques for tomatoes are:
1, base fertilizer. To revitalize the cultivation of tomatoes in open field, basic fertilizer should be applied on the basis of applying organic fertilizer, and 35-40 kg of Phosphorus Nitrate fertilizer should be applied per acre.
2, top dressing.
(1) When the first ear is swollen, 20 kg of Phosphate Phosphate Fertilizer is applied in combination with watering Mushi.
(2) After the first ear was harvested, 20 kg of nitrite phosphate was applied as a fruit fertilizer by Mu.
(3) In the full fruit period, use 20% "Heaven ridge" phosphorus nitrate, 1% potassium dihydrogen phosphate, 0.1% zinc sulfate, and 0.25% boric acid mixture. Spray once every 7-10 days. Significantly increase production and vitamin C content.

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