Greenhouse tomato scientific fertilization to ensure high yield

Pay attention to organic fertilizer. The organic fertilizer contains all the nutrients and the fertilizer is slow and long.

Organic fertilizer is the energy of soil microbes and has the function of activating soil microbes. The increase of soil microbes can increase the utilization of soil nutrients and improve the disease resistance of crops. The carbon dioxide released by the organic fertilizer during the decomposition process becomes a raw material for photosynthesis, which can significantly increase the yield. At the same time, organic fertilizers also have the function of improving crop quality. To this end, organic fertilizer is the core of tomato fertilization technology. However, the organic fertilizer used must be fermented, otherwise it will easily generate harmful gases. Under normal circumstances, 4000-5000 kg of high-quality organic fertilizer is applied per mu. Microbial inoculant preparations can also be used under normal conditions. In general, the dosage per acre is 2-3 kg.

Balance the use of fertilizers.

Fertilizer has the characteristics of high nutrient content and fast fertilizer efficiency. Reasonable use can make up for the deficiency of certain nutrients supplied by organic fertilizer and soil. It has the same effect on improving yield and improving quality as organic fertilizer, as long as the use of chemical fertilizer is not balanced. Crops and the environment cause harm. The commonly used fertilizers for tomatoes are: urea, superphosphate, potassium sulfate, borax, zinc sulfate and ternary compound fertilizer. Among them, superphosphate is better used in acidic soil or old greenhouse. The large amount of organic fertilizer and the old greenhouse, the lower limit of the amount of fertilizer can be used; the amount of organic fertilizer is small and the new greenhouse can be used with a high limit of fertilizer.

Reasonably allocate the proportion of base fertilizer and top dressing.

According to the characteristics of fertilizer and the law of fertilizer requirement of tomato, the proportion of base fertilizer and top dressing is determined. Under normal circumstances, organic fertilizer, phosphate fertilizer, micro-fertilizer and 80% of potassium fertilizer, 30% of nitrogen fertilizer are mixed to make base fertilizer, and 2/3 of them are evenly spread on the surface, then turned underground, and the remaining 1/3 ridge When applied in the colonization line, the remaining 70% of the nitrogen fertilizer and 20% of the potash fertilizer were used as top dressings.

After the tomato enters the fruiting period, the root's ability to absorb fertilizer decreases, and foliar spray can be applied at this time.

The commonly used method is to spray 1% urea solution per acre plus 0.5% potassium dihydrogen phosphate solution plus 0.1% borax mixture 40-50 kg, once every 5-7 days, even spray 23 times, which is beneficial to delay aging , extend the harvest period.

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