Early spring tomato after planting management
Early spring tomato planting date depends on greenhouse microclimate conditions. The index is 10 cm ground temperature should be stable at 8 DEG C, the minimum temperature at 0 DEG C (preferably to 6-7 DEG C), and stable in 5-7 days after planting. In order to timely early colonization, should be in the buckle canopy 15-20 days before colonization baked, usually in late March -4 months late colonization. After planting management is mainly temperature and humidity control and watering, fertilization and cultivation management.
Temperature and humidity control
After planting, require a higher temperature, accelerate the seedlings, as blossom sat fruit laid material foundation. So after planting 3-4 days without ventilation, shed maintain 25-30 DEG C, left and right air humidity up to 80%. After the seedlings to reduce the temperature in the shed, increase the amount of exercise during the day and night, 20-25 degrees, 13-15 degrees Celsius, but at night the temperature not too low, otherwise affect the normal development of the plant, the humidity is reduced to about 60%. During the stage of fruit enlargement, temperature can be properly increased, the temperature of 25-28 DEG C during the day, at night the temperature of 15-17 DEG C 45%-60%, air humidity, soil moisture 85%-95%. Maturity, canopy temperature slightly improve 2-3 DEG C, speed up the red ripe fruit. But hanging red line should not be after the high temperature, otherwise it will affect the lycopene formation, coloring and adverse effects on the quality of. In order to maintain the proper temperature when the minimum night temperature not lower than 15 DEG C, day and night ventilation.
Watering, fertilization and cultivation
Seedlings period already to cause the high humidity environment and prevent improper watering decreasing ground temperature, effect of seedlings occurs. Seedlings after pouring a seedling water, and with the water Topdressing Urea 5-10 kg per mu, Eli urge seedling. In seedlings after water to restrain the growth of seedlings, strictly control the watering, should wash scarification, to improve the soil temperature, keep soil moisture so as to achieve the proper control of stem and leaf leggy effect, promote the in vivo accumulation characteristics. When the root fruit length to Walnut size should end the hardening of seedling per mu, need Topdressing Urea 15 kg or 1000 kg of decomposed human excrement. The fruiting period of water and fertilizer must be adequate, and top dressing 1-2 times. Per mu Topdressing Urea 10 kg urea, potassium dihydrogen phosphate, or use of foliar fertilizer. Generally every 7 days pouring water. But fertilizer irrigation should be uniform, can not suddenly big suddenly small. Otherwise, easy to appear empty or navel fruit rot disease.