Nitrogen deficiency yellow seedlings. The performance is that the wheat seedlings are evenly chlorotic and yellow, the tip of the leaves is dry, the lower leaves are yellow and dead, the short leaves of the plants are weak, and the tillers are less. This yellow seedlings often appear in plots where the soil is poor, the bottom fertilizer is insufficient, or the topdressing is not timely. For yellow seedlings caused by lack of oxygen, it is necessary to promptly apply quick-acting nitrogen fertilizers such as ammonium bicarbonate, urea, human excrement, etc., and supplement the gas to promote growth.
Manganese deficiency yellow seedlings. Wheat is deficient in manganese, and the leaves of the new leaves are strip-like chlorotic, turning yellow-green to yellow. Sometimes the leaves are light green, the yellow stripes expand to brown spots, and the tips are scorched. In this regard, 0.1%-0.3% manganese sulfate solution should be sprayed 2-3 times in time.
Potassium deficiency yellow seedlings. Wheat first begins to yellow from the tip of the old leaf, and then stretches along the veins. The yellowing part is distinct from the boundary of the health department. It is inlaid, and the leaves are yellow and soft, and they are often attached to the ground. This type of yellow seedlings mostly occurs in sandy soils and generally appears to be more important than sputum. For the potassium-deficient yellow seedlings, 667 square meters can be applied to the foliage of 100 kilograms of plant ash, or 10 kilograms of chemical potassium fertilizer. Foliar spray 1% potassium chloride solution, or 2%-3% potassium nitrate solution, or 5% grass ash leaching solution, or 0.3% potassium dihydrogen phosphate solution, usually spray 2-3 times.
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