Strawberry must be applied after the fall

After the "Liuqiu" period, when the average daily temperature drops to about 20 °C, that is, from late August to late September, it is the most suitable period for greenhouse strawberry planting. Strawberry has a high planting density and a long production cycle. The requirements for Fertilizer and water are higher than that of ordinary fruit trees. The higher the yield, the greater the amount of fertilizer needed. Therefore, the application of foot and application of base fertilizer is the key to high quality and high yield of strawberry.

The soil testing formula fertilization technology is adopted. Before the planting, the soil fertility test was carried out to understand the fertility status of the soil, and according to the fertilizer characteristics of the strawberry, a reasonable balanced fertilization plan for the whole growth period of the strawberry was formulated, that is, the soil fertility formula was balanced fertilization, and the nitrogen, phosphorus and potassium three-factor fertilizers were rationally balanced. With the medium and trace element fertilizer, determine the ratio of base fertilizer and top dressing.

Based on organic fertilizers. The base fertilizer is mainly organic fertilizer, and is applied with appropriate fertilizer. From the point of view of the fertilizer absorption of strawberry, it is necessary to absorb a large amount of fertilizer in the later stage, especially phosphorus and potassium fertilizer. The decomposition process of organic fertilizer shows that a large amount of phosphorus and potassium are released in the later stage, which can meet the growth demand of strawberry. Apply 3000-3500 kg of fully decomposed organic fertilizer or 400-450 kg of commercial organic fertilizer per mu. At the same time, add 3-5 yuan compound fertilizer 15-20 kg or urea 5-6 kg, diammonium phosphate 15-20 kg, Potassium Sulfate 5-6 kg.

Supplemented with bio-organic fertilizer. In principle, strawberries should not be heavy, otherwise root diseases such as root rot, verticillium wilt and bacterial wilt are prone to occur. Therefore, the greenhouse must be disinfected by the soil to compensate for the loss of beneficial microorganisms in soil disinfection. The dosage is 100-150 kg per mu. Bio-organic fertilizer is rich in organic matter and a variety of beneficial microorganisms, which can improve soil structure and physical and chemical properties, and provide sufficient 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 difficult-to-decompose nutrients in the soil and enhance the availability and absorbability of soil nutrients. Beneficial microbiota can also produce a variety of vitamins and growth stimulating substances during the growth process, which can effectively promote root growth and development, enhance photosynthesis, and thus facilitate the accumulation of sugar and dry matter.

The application of the base fertilizer is carried out in combination with the soil tillage, and the depth should be about 20 cm to ensure uniform distribution of the fertilizer, and to remove hard soil, stones, weeds, broken film and other debris.

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