What are the typical symptoms of phosphorus deficiency in corn?

During the growth period of corn, to grow well, in addition to watering well, you also need to fertilize well. If the fertilizer is insufficient or unbalanced, various disorders will appear. So what are the symptoms of phosphorus deficiency in corn?

1. What are the symptoms of phosphorus deficiency in corn?

When corn is deficient in phosphorus at the seedling stage, the stems and leaves are dark green with a purple-red tinge, and starting from the lower leaves, the leaf tips gradually dry up and spread progressively toward the base, gradually turning dark brown, and finally spreading to the young leaves. When phosphorus deficiency occurs from the booting stage to the flowering stage, the number of ears decreases, the kernels are not plump, and there may even be empty ears; the ear tips show barren tips, missing kernels, and irregular kernel rows.

2. What should be done about phosphorus deficiency in corn?

1. Make a correct diagnosis based on plant analysis and soil test results as well as the performance of deficiency symptoms.

2. Advocate basal application of decomposed organic fertilizer and phosphate fertilizer, adopt formula fertilization techniques, and supplement the deficient nutrient to corn according to the required amount.

3. If phosphorus deficiency is found, in the early stage you can also open furrows and apply diammonium phosphate 20 kg/mu as a side dressing, and in the later stage spray a 0.2-0.5% potassium dihydrogen phosphate solution on the leaves. Or spray a 1% superphosphate solution.