Calcium and magnesium are essential nutrients for plant growth and development. When applying a large amount of nitrogen, phosphorus, and potassium fertilizers in strawberry fields, calcium and magnesium fertilizers should be reasonably applied, otherwise the plants are prone to deficiency of the disease. Calcium Deficiency Symptoms: The leaf tips of new leaves of strawberry plants with calcium deficiency are browned and dry, with incomplete leaf margins, manifested as leaf scorch disease; the budding stage is prone to the phenomenon that the leaflets do not return to normal after unfolding; some will appear small Fruit disease, loose skin. Magnesium Deficiency Symptoms: Dark brown spots appear between the veins of the old leaves of strawberry plants, and some of the spots develop into necrotic spots. To prevent and treat calcium and magnesium deficiency in strawberries, we must take targeted measures and rationally apply fertilizer according to the cause of the disease. Control the amount of fertilizer: For soils with low calcium and magnesium content, strictly control the amount of nitrogen and potassium fertilizers, and apply them in small amounts in order to prevent the excessive concentration of salt in the soil surface and the accumulation of nutrients in the roots to inhibit the absorption of calcium and magnesium by the plants. Timely irrigation: When the soil is too dry, horse water should be timely fed to keep the soil moist and increase plant absorption of calcium. Foliar spraying: The absorption of calcium and magnesium in roots due to high soil nutrient concentration can be generally adopted in the first flowering period and early fruiting period. The calcium fertilizer can be used 0.3-0.5% calcium chloride aqueous solution or 1% calcium nitrate tetrahydrate aqueous solution, spraying once every 7 days or so, spraying 2-3 times; magnesium fertilizer can be used 1-2% magnesium sulfate solution, every other Spray it once every 7 days or so and spray it 3-5 times. Gisfer calcium and magnesium fertilizers: acid soil can be applied lime to improve the acidity, generally 50-75 kg per mu, depending on the degree of soil acidity. The basic magnesium fertilizer is magnesium sulfate or potassium magnesium fertilizer. The former is generally used in an amount of 2-4 kg and the latter is 4-8 kg.
Stick Crab Frozen,Crab Stick Frozen Food,Frozen Food Crab Stick,Frozen Imitation Crab Sticks
Zhejiang Zhoufu Food Co., Ltd. , https://www.zhoufu-food.com