After the beginning of autumn, when the average daily temperature drops to about 20°C, that is, from late August to late September, it is the most suitable time for strawberry planting in the greenhouse. Strawberry planting density, long production cycle, the requirements of fertilizer and water higher than the average fruit tree, the higher the yield, the greater the amount of fertilizer required, so the full application of base fertilizer is the key to high quality and high yield strawberry. Use soil testing and formula fertilization technology. Before the planting, the soil test was performed to determine the soil fertility status, and based on the characteristics of the fertilizer needed for strawberry, a balanced balanced fertilization program was developed for the whole growing period of the strawberry. This means that the soil-balanced fertilization formula and the balanced application of nitrogen, phosphorus and potassium are three factors. , With the trace element fertilizer, determine the proportion of base fertilizer and top dressing. Mainly organic fertilizers. The base fertilizer is mainly organic fertilizers, with appropriate quantitative fertilizer. From the point of view of strawberry's fat absorption law, it is necessary to absorb a large amount of fertilizer in the later period, especially phosphorus and potassium fertilizers. The decomposition process of organic fertilizer shows that just after the release of large amounts of phosphorus and potassium, it can meet the growth needs of strawberries. Each mu of fully cooked organic fertilizer 3000-3500 kg or commodity organic fertilizer 400-450 kg. Simultaneously add 15-20 kg of ternary compound fertilizer or 5-6 kg of urea, 15-20 kg of diammonium phosphate and 5-6 kg of potassium sulfate. Supplemented by bio-organic fertilizer. In principle, strawberries should not be re-rooted, otherwise root diseases such as root rot, verticillium wilt, and bacterial wilt can easily occur. Therefore, soil must be disinfected in the greenhouse. To compensate for the loss of beneficial microorganisms in soil disinfection, the application of bio-organic fertilizer should be applied when applying base fertilizer. The dosage is 100-150 kilograms per mu. Bio-organic fertilizer is rich in organic matter and various beneficial microorganisms. It can not only improve soil structure and physical and chemical properties, but also provide enough nutrients for crop growth. It contains a variety of beneficial micro-organisms that can be metabolized to produce various enzymes and organic acids. , It can promote the decomposition of nutrients that are difficult to decompose in soil and enhance the effectiveness and easy absorption of soil nutrients. The beneficial micro-organisms can also produce a variety of vitamins and growth stimulants during the growth process, which can effectively promote root growth and development and enhance photosynthesis, thereby facilitating the accumulation of sugar and dry matter. The application of base fertilizer is carried out in combination with soil plowing. The depth should be controlled at about 20 cm to ensure that the fertilizer is evenly distributed, and debris such as hard clay blocks, stones, weeds, and shredded films are removed.
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