First, 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 inoculation preparations can also be used under conditions, and in general, the dosage per acre is 2-3 kg.
Second, the balanced use of fertilizer
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.
3. Proportion of rational distribution of base fertilizer and topdressing
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.
Fourth, scientifically spraying foliar spray fertilizer
After the tomatoes in the greenhouse enter the fruiting period, the ability of the roots to absorb fertilizers decreases. At this time, foliar spray fertilizer can be applied. The commonly used method is to spray 1% urea solution per acre plus 0.5% potassium dihydrogen phosphate solution and 0.1. The 40% borax mixture is 40-50 kg, once every 5-7 days, and even sprayed 2-3 times, which is beneficial to delaying aging and prolonging the harvesting period.
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