The strawberry is hi-fertilizer and requires a large amount of fertilizer. It needs to absorb a large amount of nutrients from the soil each year. It is estimated that 750 kg of fruit will be harvested per acre of land, requiring 10 kg of pure nitrogen, 2.5 kg of phosphorus, and 10 kg of potassium.
First, top dressing promote premature hair: Under the premise of applying organic fertilizer, after the soil is thawed, the first topdressing of the strawberry before budding, topdressing 10 kg of urea or 15 kg of compound fertilizer per mu. Dissolve the fertilizer in water and use it to avoid injury. In mid-April, we entered the flowering period and top-dressed again with phosphorus and potash fertilizers. After applying 10 kg of compound fertilizer per acre, 0.2% potassium dihydrogen phosphate was sprayed on the leaves for 2-3 times. The interval was 10 Days or so. In combination with fertilization, a small shallow water is used before budding, and then a small amount of water is poured again during the fruit expansion period. It cannot be flooded with water, and shallow cultivators are used after watering.
Second, sparse buds: buds on the first inflorescence of strawberry fruit is good, the fruit is large, mature early, late flowers often can not form a fruit with a commercial value and become invalid flowers, wasting nutrients. Therefore, after flowering, the late weak buds should be removed in time, and 10-15 plants per plant should be reserved to reduce the consumption of nutrients, so that the nutrients can supply the buds that are opened first. In addition, the strawberry plants are dwarf, and the fruits easily fall to the ground, causing pollution and rot. After flowering, hay or wheat straw can be used to spread around the plants so that the fruits do not come into contact with the ground. After the fruit is harvested, the grass can be removed.
3. Prevention of pests and diseases: In early spring, if ground-covered tigers, golden needle beetles, or crickets are found in the ground, they can use 200 grams of crystals of dichlorfon 200 grams or 50% of phoxim emulsion 200-300 grams per acre. Kg watering roots. Or use 50 grams of 90% crystal trichlorfon, mix 1-2.5 kilograms of water with 2.5-3 kilograms of sauteed wheat bran, or stir in 10 kilograms of chopped fresh grass for spreading insecticide. Control of gray mold, can be used 50% nellikon wettable powder 800 times liquid or 50% quick-inking WP 1000 times spray; control brown spot, available 20% agricultural anti-120 water 200 times or 50% Thiophanate 500-1000-fold spray. Control of powdery mildew can be controlled with 1.25% of Myclobutanil EC 2000 times or 20% Triadimefon 1000 times. The most fundamental measure for the prevention and treatment of viral diseases is the use of virus-free seedlings to cultivate and control the transmission of aphids. At the same time, they can be sprayed with a 1.5% solution of Lingzhi 1000 times solution or a 83-times booster solution at the early stage of disease. Cockroach can be sprayed with 50% anti-inferior WP 2000 times solution or 10% imidacloprid wettable powder 1500-2000 solution.
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