According to the survey, the direct cause of “hollow fruit†in autumn and winter is because the temperature of water poured in greenhouses has dropped. Under low temperature conditions, the roots of tomatoes are cold-shrink and roots have to live down, and the water absorption is poor. In this case, the young fruit is inflated. In the case of short-term water supply short-term, it is easy to emerge in the local fruit less meat scene. Therefore, the temperature of tomato watering in greenhouses in late autumn and winter must be increased by 10°C or more. Temporary storage of water can be used in the corner of the greenhouse to facilitate warming.
Strengthen light management During the middle and late stages of growth, appropriate snoring and picking of leaves should be carried out to enhance light and ventilation. It is usually the result that after the fruit on the branch is picked, the side branches below it are to be promptly knocked out to ensure the nutrient supply of the fruit setting branches, and the entire leaves below the result branches are removed. The leaves on the ear cannot be removed to ensure that the upper layer of fruit develops well. If there is not enough light, artificial lighting can be compensated.
Strengthen temperature management At this time, the temperature during the day is controlled at about 25-30°C, and the temperature at night is between 15-20°C to prevent the seedlings from growing. Tomatoes are sensitive to temperature during flowering, especially 5 days before flowering and 3 days after flowering. Less than 15°C or higher than 30°C is not conducive to flowering and pollination. In the result period, the temperature is controlled at about 25°C during the day and about 15°C at night.
Reasonable water management is mainly controlled by water under the premise of ensuring normal growth. Before flowering, the water maintains the degree of moderate humidity, soil moisture content of 65% -75%, the soil should be maintained in the result period of moist, soil water content between 75% -85%. Usually when the tomato grows to the size of the walnut, it will start to water and fertilize, and it will be able to apply organic fertilizer or compound fertilizer with the water. Later, depending on the growing condition of the plants and the meteorological conditions, picking a tomato and pouring a fertilizer.
Rational fertilization should make up for a large number of elements. Nitrogen, phosphorus, and potassium fertilizers should be dominated by nitrogen and potassium, and the vegetative and reproductive growth of plants should be well coordinated. Basal fertilizer is usually applied at a rate of 4,000 kg per hectare of compost heap fertilizer, 40 kg of compound fertilizer, and 30 kg of superphosphate. Top dressing should be applied thinly before fruit setting, re-applied after fruiting, and top-dressing.
When the flowering results of hormones are reasonably applied, the pollination and fertilization abilities should be increased as much as possible to form seeds, and artificial pollination can be carried out conditionally. On the day of flowering or 1-2 days before and after flowering, depending on temperature conditions, 15-20 mg/kg of anti-dropping agent is usually applied to avoid fruit drop.
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