After the tomatoes are planted in the greenhouse, the level of income depends mainly on whether or not the management is scientific and meticulous. Only by creating the most suitable environmental conditions for the tomatoes can high yields and benefits be achieved.
One, sunny days to ventilate
Sunny day, after seeing the light in the greenhouse, uncover the grasshoppers, clean the shed film, increase the light transmittance of the film, and open the top seam when the temperature rises to about 30°C. The temperature of the vents will decrease by 5°C after ventilation. 8°C is appropriate. In the afternoon, it should be closed at 22°C and closed before sunset. The minimum temperature in the morning can not be lower than 12°C.
Second, deal with cloudy snow days
Cloudy weather early exposing early cover grass is not ventilated. When the snow is snowed, the snow will be properly exposed at noon, and attention must be paid to the snow during the day. The weather must be covered at night, and the film must be kept cold at night. Continual overcast, sunny days after snow, shade must be shaded, not ventilated, so that the temperature of the shed slowly rises, heating too much, can easily cause wilting plants. Yin and snow days, prone to diseases, to spray the disease, spray 25 grams of urea in each barrel, 20 grams of potassium dihydrogen phosphate, for tomatoes to add nutrients. When the temperature in the cloudy snow canopy is too low, it can be heated in the shed to raise the temperature and prevent freezing.
Third, strengthen fertilizer and water management
When the first panicle walnut is large, the first top-dressing watering is performed, and the 15- to 20-kg compound fertilizer per mu is recovered. After the second and third panicles, etc., each panicle grows to the size of the walnut. Once fat, each vine recovers 10-15 kilograms of urea and 8-12 kilograms of potassium sulfate. Generally, it is top-dressed with water. Watering must be done on a sunny day. At noon, opening the tuyere for ventilation and dehumidification can effectively prevent the occurrence of diseases. Low-temperature dark irrigation under the film, the amount of water to be less, to prevent too much water caused by excessive temperature drop, affecting the normal growth of tomatoes.
Fourth, reasonable pruning
The tomato in the greenhouse is generally single-stalked and pruned, leaving only one main stalk, and all side branches are completely removed. The side branch should be selected for sunny mornings, which will help wound healing. When the first ear is green (when the fruit grows to the maximum and the top of the fruit turns from green to white), the old leaves under the first ear are removed, and when the second ear is green, the old leaves under the second ear are removed. By analogy, this will facilitate ventilation and light transmission, reduce nutrient depletion and prevent the spread of diseases. When the fifth stalk of the main stalk is cultivated after the fall, it leaves 2 to 3 leaves topping at the top of the ear. After the winter sorghum cultivation of the main stalk knot to 6 to 7 ear fruit, leave 2 to 3 leaves above the ear topping, and set aside the side branch on the stalk. When the fruit on the main culm is harvested, if each tomato produces collaterals, leave a robust collateral at the base and cut the old branch above it. If a strain does not produce collaterals, the tomato is toppled and two collaterals are left on the plant next to it. One collateral is lifted with the plant's sling, and the other branch is planted with no collaterals. Slings hang to grow. The second pod can end up with 5-6 layers of fruit.
Fifth, keep flowers
In winter, when the temperature is low and the light is weak, the tomatoes are not easy to set fruit, so the flowers should be preserved. In the case of 3 to 4 blossoms in one inflorescence, spraying with a concentration of 25 to 50 mg/kg of anti-dropping agent (tomato spirit), it is advisable to add 1000 times of 50% sucrose to control ash when spraying. mildew.
Six, thinning and fruit thinning
Tomato cultivation also involves thinning and fruit thinning, because the result of one spike is too much, the fruit size is different, and the commodity is poor. Large-fruited varieties have 3 to 4 fruit per panicle, and medium-fruited varieties have 5 to 6 fruit per panicle, and the first and second layers can be appropriately left to prevent falling. Stay fruit is generally "the head to the tail to stay in the middle", that is, the first fruit does not stay behind the small fruit, malformed fruit does not stay, so that the size of the same fruit, good merchandise.
Seventh, to strengthen the prevention of pests and diseases
The key to prevention and control of pests and diseases is prevention. The main goal is to eliminate the disease by destroying and destroying the former rickets, and to create a clean and clean cultivation environment by sterilizing greenhouse sheds in high temperature. Take the sunny watering under the membrane and watering in time to control the humidity and humidity. Air humidity and other agricultural measures and the use of pesticides to prevent, generally continuous yin, rain, snow and vegetables after the weather is easy to disease, so look at the weather forecast, in the rain, snow, snow before the onset of prevention. When it is found that pests and diseases have occurred, they should remove the diseased leaves and fruit in time and use drugs for prevention and treatment in time.
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