If it is a greenhouse with many years of growing vegetables, due to years of organic fertilizer and fertilizer input, the soil is already very fertile, so base fertilizer should be applied less. The shorter the shed age, the higher the corresponding base fertilizer usage, and the general fertilizer dosage should not exceed 75 kg per mu. Top dressing should be applied top-dressing, according to the number of ears to determine the amount of fertilizer. Top-dressing fertilizers are mainly composed of high-nitrogen, low-phosphorus, and high-potassium sulfate-based compound fertilizers, and organic fertilizers such as fulvic acid are more effective.
Second, timely supplement of trace element fertilizer
Tomatoes have more demand for calcium, magnesium, boron, zinc, and iron, and vegetable farmers should make appropriate supplements. Addition from the end of application, topdressing and foliar spray fertilizer in three aspects, the amount of reference manual, with more useless.
Third, prevent three diseases
Timely control of three major diseases of tomato bacterial leaf spot, late blight and gray mold. The control of bacterial leaf spot was based on seed treatment. Streptomycin was used at the beginning of the disease to kill 3000 sprays. Prevention of late blight disease, anti-virus maggots, spraying before the onset of treatment, the use of metalaxyl Mn, zinc, Ke Lu, the world's higher spray. Prevention of gray mold is as follows: First, cleanup of corrupt materials during agricultural operations. The second is to control the use of Shijiale, Nongli Ling and other spray, pay attention to spray calcium when combined. The third is to add the medicine used to control Botrytis cinerea in the sneezing flowers, and to prevent it when it is appropriate.
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