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Greenhouse tomato scientific fertilization high yield
Scientific application of fertilizers is the key to achieving high quality and high yield in greenhouses. 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. The carbon dioxide released by organic fertilizer during the decomposition process becomes a raw material for photosynthesis and can significantly increase production. At the same time, organic fertilizer also has the function of improving crop quality. Paying attention to this organic fertilizer is the core of tomato fertilization technology. However, the organic fertilizer used must be fermented, otherwise it is easy to produce harmful gases. In general, 4000-5000 kg of high-quality organic fertilizer is applied per acre. Microorganisms can also be used as conditions for inoculation. Generally, the dosage per acre is 2-3 kg. Balance the use of chemical fertilizers. Fertilizer has the characteristics of high nutrient content and rapid fertilizer effect. Reasonable use can make up for the deficiency of organic fertilizer and certain nutrient elements in soil, and has the same effect on increasing production and improving quality as organic fertilizer. It is not necessary to use chemical fertilizers in a balanced manner. Crops and the environment cause damage. Tomato commonly used fertilizer varieties are: urea, superphosphate, potassium sulfate, borax, zinc sulfate and ternary compound fertilizer. Among them, the use of superphosphate in acidic soils or old greenhouses is better. In the old and large greenhouses where the amount of organic fertilizer is large, the lower limit of the amount of fertilizer can be used; the upper limit of the amount of fertilizer can be used for organic fertilizers with a small amount and new greenhouses. Reasonably distribute base fertilizer and top dressing ratio. According to the characteristics of fertilizers and tomato fertilizer requirements, determine the proportion of basal and top dressing. 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 potassium fertilizer were used as topdressing. After the tomato enters the full fruit period, the ability of sucking fertilizer in the roots is reduced. At this time, foliar fertilizer application can be performed. The commonly used method is to spray 1% urea solution and 0.5% potassium dihydrogen phosphate solution plus 0.1% per acre each time. Borax mixture 40-50 kilograms, once in 5-7 days, and spray 2 or 3 times, will help delay aging and extend the harvest period.