Sweet pepper lack of prevention and cure
Disease symptoms: Nitrogen deficiency: The leaf area is small and the flowering position is increased. The leaves appear thin and yellow, and the yellowing phenomenon is expanded from the lower leaf to the upper leaf. Phosphorus deficiency: Initial growth of plants was slow but there was no yellowing. Potassium deficiency: The leaves are dark green, with some necrotic symptoms on the leaf margins, browning between veins, and severe yellowing of the lower leaves. Calcium deficiency: Apical leaf growth is poor, leaf tip is yellow, and some leaves show raised ribs. Umbilical rot appeared on the fruit. Calcium deficiency: Mainly manifested in the chlorosis between the old leaves of the lower leaves is the main symptoms. Boron deficiency: The growth and development of the upper part of the plant ceased, and the petiole and veins became hard to break off, and the leaves were distorted or the buds fell off. Magnesium deficiency: chlorosis between leaves and veins, often with variegated spots on leaves, and leaf margins remain green.
Incidence of the law: lack of phosphorus: soil acidity, soil tight conditions, prone to phosphorus deficiency; long low temperature and long-term impact on the absorption of phosphorus, so the production of low temperature will be phosphorus deficiency. Potassium deficiency: low potassium content in the soil or lack of potassium or lime fertilizer, affect the absorption of potassium, potassium deficiency often occurs. Magnesium deficiency: The continued growth of magnesium in the eggplant on the sand is due to insufficient supply of magnesium in the soil, excessive application of potassium fertilizer in the production, low ground temperature or phosphorus deficiency may cause magnesium deficiency in eggplant.
Disease classification: malnutrition
Prevention measures: (1) Prevent nitrogen deficiency: Before planting, apply sufficient base fertilizer or chicken manure 5500kg. (2) Prevent phosphorus deficiency: Apply organic fertilizer at the same time before planting 667 to apply 25-35kg of phosphate fertilizer. (3) Prevent potassium deficiency: Apply 15-25 kg of potassium sulfate to the base fertilizer, spread it evenly on the surface of the soil, and evenly thicken it into the tillage layer. (4) Preventing iron deficiency: Adjusting the acid soil to neutrality, magnesium hydroxide or lime can be used to gradually adjust and improve the conditions of multiple fertilizers and more humidity. When the soil is too wet, watering is reduced and the water is drained immediately after the rain. (5) Prevent magnesium deficiency: Pay attention to the improvement of acidic or alkaline soil to neutral, increase organic fertilizer and pay attention to nitrogen, phosphorus and potassium. In emergency, spray 0.15% magnesium sulfate solution. (6) Prevent manganese deficiency: Apply appropriate amount of manganese oxide or manganese sulfate to the base fertilizer. In emergency, spray 0.2% manganese sulfate solution or 0.08% potassium permanganate solution.
General description: Symptoms of Nitrogen Deficiency: The leaf area is small, the flowering position is increased, the leaves appear thin and yellow, and the yellowing phenomenon is expanded from the lower position leaf to the upper position leaf. Phosphorus deficiency: Initial growth of plants was slow but there was no yellowing. Potassium deficiency: The leaves are dark green, with some necrotic symptoms on the leaf margins, browning between veins, and severe yellowing of the lower leaves. Calcium deficiency: Apical leaf growth is poor, leaf tip is yellow, and some leaves show raised ribs. Umbilical rot appeared on the fruit. Magnesium deficiency: Mainly manifested in the chlorosis between the old leaves of the lower leaves is the main symptoms. Boron deficiency: The growth and development of the upper part of the plant ceased, and the petiole and veins became hard to break off, and the leaves were distorted or the buds fell off. Magnesium deficiency: chlorosis between leaves and veins, often with variegated spots on leaves, and leaf margins remain green. Phenomenon deficiency Phosphorus: In the case of soil acidity and soil compaction, phosphorus deficiency disease is prone to occur; long-term hypothermia seriously affects the absorption of phosphorus, so low phosphorus production on the ground can also lead to phosphorus deficiency. Potassium deficiency: low potassium content in the soil or lack of potassium or lime fertilizer, affect the absorption of potassium, potassium deficiency often occurs. Magnesium deficiency: The continued growth of magnesium in the eggplant on the sand is due to insufficient supply of magnesium in the soil, excessive application of potassium fertilizer in the production, low ground temperature or phosphorus deficiency may cause magnesium deficiency in eggplant. Non-environmental Pollution Control Law (1) Prevent Nitrogen Deficiency: Apply 5500 kg base fertilizer or chicken manure before planting. (2) To prevent phosphorus deficiency: Apply 667 ? organic fertilizer before planting and apply 25-35 kg of phosphate fertilizer. (3) Prevent potassium deficiency: Apply 15-25 kg of potassium sulfate to the base fertilizer, spread it evenly on the surface of the soil, and evenly thicken it into the tillage layer. (4) Preventing iron deficiency: Adjusting the acid soil to neutrality, magnesium hydroxide or lime can be used to gradually adjust and improve the conditions of multiple fertilizers and more humidity. When the soil is too wet, watering is reduced and the water is drained immediately after the rain. (5) Prevent magnesium deficiency: Pay attention to the improvement of acidic or alkaline soil to neutral, increase organic fertilizer and pay attention to nitrogen, phosphorus and potassium. In emergency, spray 0.15% magnesium sulfate solution. (6) Prevent manganese deficiency: Apply appropriate amount of manganese oxide or manganese sulfate to the base fertilizer. In emergency, spray 0.2% manganese sulfate solution or 0.08% potassium permanganate solution.
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