Planting peanuts, pay attention to the application of potassium and calcium
Jiangyin Suofei Electronic Technology Co.,Ltd. , https://www.suofeiscales.com
July 19 10:01:02, 2024
Potassium can increase the photosynthetic intensity of peanut leaves and accelerate the operation of photosynthetic products, and can inhibit the growth of stems and leaves; potassium can also promote nitrogen uptake and root tumor nitrogen fixation, and improve drought and cold resistance. Potassium deficiency in peanuts affects the transport and transformation of photosynthesis and photosynthetic products, thus directly affecting the formation of fat in peanut kernels. The symptoms of potassium deficiency in peanuts are characterized by thick green leaves. The yellow leaves appear at the edge or tip of the leaflets from the old leaves. The leaves are even brown when the potassium is severely deficient. The uneven growth of the leaves often causes curling or ripples, which affects photosynthesis. Working with matter. Therefore, in the soil of potassium deficiency, special attention should be paid to the application of potassium fertilizer. Even in soils with high potassium content, proper potassium application can increase the yield and quality of peanuts. Potassium application of peanuts should be carried out in stages, especially in soils with potassium deficiency such as sand and red-yellow soil. The effect of potassium application is more significant. The plant ash and soil fertilizers are rich in potassium, and about 75 kg per mu of wood ash is used as the base fertilizer, or 5-7 kg of potassium sulphate or 30 kg of kiln ash potassium. Potash, such as grass ash, is easily lost and should be applied in deep layers. Peanut flowering needs a large amount of potassium, so the people in the soil potassium-deficient area have the habit of chasing the flower fertilizer at the initial flowering stage. Generally, the application of 50-75 kg per mu has a certain yield increase effect. In order to improve the effect of potassium application, attention should be paid to the combination of nitrogen and phosphorus nutrition. When the nitrogen and phosphorus nutrition is sufficient, the potassium fertilizer at the flowering stage has a good effect. Calcium promotes the formation of pods, reduces pods and increases the number of fruit. The application of calcium fertilizer lime in acid soils can also reduce soil acidity and favor nitrogen fixation. Therefore, calcium fertilizer can increase peanut yield and quality. The peanut is deficient in calcium, the plant grows slowly, the roots are weak, the irregular white spots appear on the edges and leaves of the old leaves, the petiole becomes weak, and the new leaves are small, which affects the peanut yield. Both lime and gypsum can be used as base fertilizer and top dressing. Acidic soil generally uses about 50 kilograms of lime per mu , and is applied as a base fertilizer when combined with cultivated land. When used as top dressing, it can be applied to the peanut pod area in combination with cultivating soil in the early flowering stage. The application of lime in slightly acidic soil should be applied once every 2-3 years, and should not be applied annually to prevent soil compaction. Gypsum is generally applied in alkaline soil. In saline-alkaline soil, pH is also adjusted to reduce the toxic effect of saline-alkali on peanut roots. Gypsum can also be applied on neutral and slightly acidic soils, generally 5-7.5 kg per mu .
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