(I) Cultivation and management measures
The cold period is the result period and the best time to create economic benefits. However, due to the low outside temperature, resulting in slow fruit growth and severe cold damage, in order to increase the greenhouse temperature during the day as much as possible to improve the temperature within the shed, even if the temperature does not release the wind at 35 °C, this management measures called high temperature fruit.
1. As soon as the grass cover is covered and the cover is covered, the early exposure will make the greenhouse more light, and the early cover will prevent excessive heat loss and avoid the nighttime temperature being too low.
2. Wipe the film after unrolling the grasshopper to increase the light transmittance of the film and increase the amount of light entering the greenhouse.
3, high temperature fruit, generally do not release air during the day or less air, try to increase the temperature inside the greenhouse, more heat savings, to prevent the evening temperature is too low.
4, with high temperature fruit measures, carbon dioxide fertilization. Sunny day 9-12 am is the best fertilization time.
5, plant finishing and fruit harvesting.
6, appropriate watering, supplement the soil moisture, but the amount of water to be small. Note: Do not water before cloudy and cloudy days; water in the morning without watering in the morning; do not pour water in small water.
(B) Pest Control
Due to the low temperature, abnormal growth of fruits and abnormal plant performance are mostly caused by low temperatures, and not caused by pathogenic bacteria. This disease is called a non-invasive disease.
1, common non-invasive diseases
The sharp-nosed fruit formed by using too much hormone; the empty fruit formed by the low-temperature and dull sunshine, the multi-chambered chrysanthemum fruit, the cracked fruit, and the finger-shaped fruit; prone to rot and rot when the sunshine is insufficient, the humidity is low, the potassium is insufficient, etc. Corrosion and black tendon rot are two types. Black rot tends to appear in winter greenhouses, that is, vascular bundles turn brown. Under low temperature conditions, window opening effect is also prone to occur. Severe cracking exposes the placenta; calcium deficiency causes umbilical rot of the umbilical rot; low-temperature and low-light is also one of the reasons for the formation of poorly shaped fruit. The causes of black-strip disease are very complex. This disease is prone to occur in winter cultivation with low temperature and low light; soil moisture is large, groundwater level is high, and soil is prone to black rot when it is deprived of oxygen; too much fertilizer, especially excessive ammonia and Insufficient potassium can easily lead to black rot.
2, the solution
Raising greenhouse temperatures and light and improving the environmental conditions of tomato growth are fundamental solutions. Before the winter, the sheds must be repaired and the grasshopper must meet the quality requirements. The light transmission performance of the film and the non-dusting and anti-fog performance are good. When the grass cover is covered with a film and covered with grass, overlapping measures are required. The greenhouse temperature and light; can re-apply organic fertilizer, the appropriate use of package fertilizer, pay attention to nutritional balance; pouring small water without pouring water, avoid flood irrigation and other measures are conducive to the prevention of black tendon rot. In the management, pay attention to the basic principles of using high temperature fruits.
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