Due to factors such as temperature and humidity and improper management, tomatoes in greenhouses are prone to stiff fruit, empty ears and hollow fruit. In order to achieve high yield and high efficiency, in addition to cultivating strong seedlings, rational fertilization, and strengthening temperature and humidity management, some skills are needed. One is to remove the first flower of each flower, more flowers, early fruit thinning, and good fruit. The first flower should be removed in time. Each flower can be flowered with 6 to -8 flowers. When the tomato grows to the size of the pigeon egg, remove the deformed, fruit-breaking, diseased fruit and oversized fruit. -5 is appropriate. The second is to master the time spent and the amount of medication. If the flower is too early, it will form a stiff fruit. If it is too late, it will not be easy to set fruit or form a cracked fruit, which will affect the commerciality. The flower on each ear begins with the second flower (the first flower is removed), and each time basically 2-3 flowers are open the same day, and the flower is best at this time. Time is best when the flowers are just open in the morning. For the concentration of anthers, the concentration should be higher at low temperatures and slightly lower at high temperatures. Third, the fertilizer and water should be sufficient to meet the fruit enlargement, increase production and increase efficiency. When the size of tomato walnut is high, it needs to be fertile. At this time, the fertilizer must be sufficient. Otherwise, it will be easy to appear dead fruit, small fruit, hollow fruit, etc., affecting quality. On the basis of applying sufficient bio-organic fertilizer, the base fertilizer is applied with a quick-acting and long-acting full-nutrient balanced type compound fertilizer. According to the number of spikes of long fruit, determine the amount and type of fertilizer applied, focusing on the yield of topdressing. If a total of 6 spikes are left, the tops can be topdressed 3 times when the first, third and fifth ear fruits are expanded; if 4 ears are left together, the tops and 3s will be topdressed twice when the fruit is inflated; Appropriate increase of top dressing 1 time. The top dressing is mainly composed of potassium sulfate type quick-dissolving compound fertilizer. The formula is preferably medium nitrogen, low phosphorus and high potassium, and the dosage is 20-30 kg/mu per mu. In the late growth stage, when the ground temperature is low, it can be applied better with fertilizers containing humic acid or amino acids to buffer the effects of pure chemical fertilizers on the ground temperature and root system. At the same time, pay attention to the addition of root water in the middle of 60 days after planting. It is recommended to apply 10-15 kg of humic acid or amino acid liquid fertilizer per acre. The high-nitrogen fertilizer should be avoided in the topdressing, avoiding the drastic changes of the soil dry and wet, and at the same time spraying the imported nutrient-type foliar fertilizer to avoid the occurrence of deficiency of the plant. It is advisable to stop watering and fertilizing when the penultimate spike fruit begins to change color to facilitate coloring and expansion. The fourth is to pay attention to the late picking leaves can not be excessive. During the fruit coloring period, many vegetable farmers promoted fruit color change, increased light, and removed all the leaves in the lower part of the ear. Some people also removed the upper leaves, and too few leaves will seriously affect the photosynthetic accumulation of the leaves. Insufficient, resulting in the appearance of hollow fruit. Therefore, it is appropriate to snoring and picking leaves in the middle and late growth stages. Metallurgical Microscope Metallurgical Microscope,Laboratory Microscope,Upright Metallurgical Microscope,Upright Laboratory Microscope NINGBO VANCO INSTRUMENT CO.,LTD , https://www.vancoscope.com
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