Symptoms and remedies for the deficiency of nitrogen, phosphorus and potassium in wheat

Nitrogen, phosphorus and potassium are three nutrients necessary for the growth and development of wheat, and the need for a large amount of nutrients. Once a certain element is lacking, it will show the corresponding symptoms of deficiency through the external morphology of the plant. And the basis for taking remedial measures. Linyi Fertilizer Network Copyright

In the absence of nitrogen in wheat with nitrogen deficiency, the plant grows poorly, the seedlings are weak and erect, the tillers are few, the leaves are narrow and short, the base leaves start from the tip of the leaves, gradually turn yellow and dry, and gradually develop upward. Linyi Fertilizer Network Copyright

Remedial measures: nitrogen deficiency at seedling stage, 7-8 kg of urea per acre, or 20-25 kg of ammonium bicarbonate, or 600-700 kg of human excrement, applied in inter-ditch or watering; 2% urea in later stage Solution foliar application. Linyi Fertilizer Network Copyright

In the absence of phosphorus in phosphorus-deficient wheat, the roots of wheat are poorly developed, and the secondary roots are weak and weak. When they are in the jointing stage, they are not stretched or tied, and they are “chicken-like”. The plants are thin, the tillering period is delayed, the number of tillers is reduced, and even the number of tillers is reduced. Leaf color dark green dull, slightly purple; especially the tip and leaf sheath purple is significant, and gradually develop from leaf tip to base, from old leaf to young leaf; plant cold resistance decline, easy to freeze, heading, flowering Delayed in maturity, insufficient grouting, and reduced 1000-grain weight. Linyi Fertilizer Network Copyright

Remedial measures: Phosphorus deficiency in seedling stage, 20-30 kg of calcium phosphate per acre, applied in the inter-row ditch or water, or 150-200 g of potassium dihydrogen phosphate per acre, sprayed with 75 kg of water; Later, the leaves are sprayed with 2% to 3% of superphosphate leaching solution or 0.2% to 0.3% potassium dihydrogen phosphate solution. Linyi Fertilizer Network Copyright

In the absence of potassium in potassium-deficient wheat, the plant grows slowly, the roots are poorly developed, perishable, the stems are short, the leaves are dark green or blue-green, and the leaves are dark and draped, the tips and edges of the leaves are yellow, then the browns are brown, but the veins are still It is green. When it is serious, the whole leaves are dead, the plants are wilting, easy to fall, premature aging, the ear is small and light, and the quality is worse. Linyi Fertilizer Network Copyright

Remedial measures: potassium deficiency at seedling stage, using 15 kg of potassium sulphate per acre, or 100 kg of ash, and grooving between rows; late use of 1% to 2% potassium sulphate solution or 0.2% to 0.3% potassium dihydrogen phosphate solution Or 5% to 10% of the ash leaching solution of the leaves. Linyi Fertilizer Network Copyright

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