Nowadays, there is a wide variety of fertilizers in the agricultural material market, which makes farmers unable to understand the use of fertilizers. They blindly listened to the recommendation of agricultural resources dealers, resulting in salinization of well-tolerated land. In order not to let the vegetable farmers blindly use fertilizer, here to introduce what fertilizer is needed for tomatoes, how to apply some reasonable.
First, pay attention to organic fertilizer
Organic manure contains all nutrients and has a slow and long-lasting fertilizer effect. Organic manure is the energy source of soil microorganisms and has the function of activating soil microorganisms. The increase of soil microorganisms can increase the utilization of soil nutrients and increase the disease resistance of crops. Paying attention to this organic fertilizer is the core of tomato fertilization technology. However, the applied organic fertilizer must be fermented, otherwise it is easy to produce harmful gases. Under normal circumstances, 5000 kg of high-quality organic fertilizer is applied per acre. Microorganism inoculation can also be used if conditional, generally 2-3 kg per mu.
Second, balanced application of chemical fertilizers
Fertilizer has the characteristics of high nutrient content and rapid fertilizer efficiency. Reasonable application can make up for the shortage of organic fertilizer and certain nutrient elements in the soil. Balanced application of chemical fertilizer will not cause harm to crops and the environment. Fertilizers commonly used in tomato varieties are: urea, superphosphate, potassium sulfate, borax, zinc sulfate and ternary compound fertilizer, of which superphosphate in the acidic soil or the use of old greenhouses is better.
Third, the rational allocation of base fertilizer, top dressing ratio
Under normal circumstances, organic fertilizer, phosphate fertilizer, trace fertilizer, 80% potassium fertilizer, and 30% nitrogen fertilizer are used as base fertilizers, and 2/3 of them are evenly spread on the surface, then turned underground, and the remaining 1â„3 of the ridge is When applied in the planting line, the remaining 70% of nitrogen fertilizer and 20% of potash fertilizer were used as top dressing.
Fourth, foliar spray fertilizer
After the tomato enters the full fruit period, the ability of sucking up the roots is reduced. At this time, foliar spraying can be performed. The commonly used method is to spray 1% urea, 0.5% potassium dihydrogen phosphate and 0.1% borax in a mixed solution of 50 kg per acre, spraying once every 5-7 days, and spraying 2-3 times, which is beneficial to delaying plant senescence. Extended harvest period.
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