tomato planting in greenhouse
Different growth stages have different temperature requirements and responses. The suitable temperature for seed germination is 25°C to 30°C, with the lowest temperature being 12°C. The suitable daytime temperature during the seedling stage is 20℃--25℃, and the suitable night temperature is 10℃--15℃. The flowering period is sensitive to temperature. The suitable temperature during the day is 20℃--30℃, and the suitable temperature at night is 15℃--20℃. Too low (below 15℃) or too high (above 35℃) is not good for the growth of flower organs. normal development. During the fruiting period, the daytime temperature is 25℃--28℃, and the suitable night temperature is 16℃--20℃. When the temperature is low, the fruit growth rate is slow. When the daily temperature increases to 30℃-35℃, the fruit growth speed is faster, but the fruit growth rate is faster. There are few fruits, high night temperature is not conducive to nutrient accumulation, and the fruit development is stunted. High temperatures above 26--28 degrees Celsius can inhibit the formation of lycopene and other pigments and affect the normal color change of fruits. The optimal temperature for tomato root growth is 20-22 degrees Celsius.
Tomato growth and development requirements of water conditions
Tomato above ground stem and leaves luxuriant, strong transpiration, and the root system is developed, strong attraction ability, water demand is more, but do not need a lot of irrigation, especially in the seedling period and pre-flowering period, too much water will be seedling futile, will affect the results, and at the same time, pharmaceutical spraying, to enhance the ability of tomato resistance to disease, prevention of green blight, wilt disease occurs. Use 150-300 times of Cyanocarb + 300-500 times of Diliwang + 600 times of Wofensin to irrigate the roots 1-2 times. After the first inflorescence fruits expand and grow, branches and leaves grow rapidly, which need to increase water supply. The amount of watering during the fruiting period should be sufficient, should maintain the soil moisture content of 60% - 80% is appropriate, after controlling the amount of water, timely use of drugs, to protect the normal growth of the fruit. Spray 2-6 times with 150-300 times of cycloheximide + 600 times of Wofensin, or irrigate the roots at the same time; high incidence of disease at the same time compounded with 1000-1500 times of garlic oil or other chemicals. If the soil humidity is too large, poor drainage will affect the normal respiration of the root system, and in serious cases, the roots will rot and die. In addition to the fruiting period of the soil is dry and wet, especially after drought watering has occurred a lot of fruit cracking and induced navel rot disease (recommended treatment of navel rot disease program, after the onset of the disease with the green Kulik 90-150 times + garlic oil 1000-1500 times for spray + irrigation, even with 2-3 times, 2-3 days interval (spraying the need for 1 day spraying 1 time, spraying for 3 consecutive days) beautiful fruit An 300 times + Wofeng Su 600 times! Simultaneous spraying, spraying and irrigation to treat the disease. If the disease is serious, it can be compounded with other chemicals.
Tomatoes generally require a relative humidity of about 50%. If the air humidity is too high, not only will the tissues shrink normally, but they will also be susceptible to diseases. Medication should be used during this optimal period to prevent the occurrence of diseases.