Strawberry topdressing promotes early onset
Strawberry is fertilized and requires a large amount of nutrients. It needs to absorb a large amount of nutrients from the soil every year. According to estimates, 750 kg of fruit per acre of land requires 10 kg of pure nitrogen, 2.5 kg of phosphorus and 10 kg of potassium.
Topdressing promotes early hair. Under the premise of applying organic fertilizer, after the soil is thawed, the first top dressing is carried out before the germination of the strawberry, and 10 kg of urea or 15 kg of compound fertilizer is applied per mu. Dissolve the fertilizer in water and use it to avoid root damage. In mid-April, the flowering season was followed by topdressing once, with phosphorus and potassium as the mainstay, 10 kg of compound fertilizer per mu was applied. During the flowering period, foliar spraying was carried out with 0.2% potassium dihydrogen phosphate for 2 to 3 times, with an interval of 10 Around day. In combination with fertilization, shallow water is used once before the bud, and then a small water is poured in the fruit expansion period. It is not possible to flood the water, and then shallow cultivating after watering.
Thinning flowers and buds. The flowers on the strawberry inflorescences have good results. The fruits are large and mature early. The late blooms often cannot form fruits with commercial value and become invalid flowers, which wastes nutrients. Therefore, after the bud, the weak flower buds should be removed in time, and 10 to 15 seeds should be reserved for each plant to reduce nutrient consumption and concentrate the nutrients to supply the first flower buds. In addition, the strawberry plants are short and the fruit is easy to hang down to the ground, causing pollution and rot. After flowering, hay or wheat straw can be used to spread around the plant so that the fruit does not come into contact with the ground. The grass can be removed after the fruit picking.
Control pests and diseases. In the early spring, when the ground tigers, golden worms, cockroaches, etc. are found to be harmful to strawberries, they can use 90% crystal trichlorfon 200 g or 50% phoxim emulsion 200-300 g per acre, and water the roots with water 1 to 1.5 kg. Or use 50% crystal trichlorfon 50 grams, mix 1 to 1.5 kg of water with 2.5 to 3 kg of sauteed wheat bran, or mix 10 kg of chopped fresh grass for spreading insecticide. For the control of gray mold, it can be sprayed with 50% Nongli Ling WP 800 times or 50% keiling WP 1000 times. For brown spot prevention, 20% agricultural anti-120 water 200 times liquid or 50% can be used. Methyl thiophanate 500 ~ 1000 times liquid spray. To prevent and control powdery mildew, it can be controlled by 1.25% nitrile emulsifiable concentrate 2000 times liquid or 20% powder rusting wettable powder 1000 times liquid. The most fundamental measure for the prevention and treatment of viral diseases is to use the virus-free seedlings to cultivate and control the aphids that are transmitted and poisoned. At the same time, they can be sprayed with 1.5% phytopathogenic emulsion 1000 times solution or 83 anti-agent 100 times solution at the beginning of the disease. The cockroach can be sprayed with 50% anti-Pu Wei WP 2000 times solution or 10% imidacloprid WP 1500-2000 times solution.
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