Symptoms of phosphorus deficiency in sugarcane and its control methods

I. Symptoms of phosphorus deficiency in sugar cane: Underdeveloped root groups, slow growth, and low tillering. The growth of the above-ground part is poor, and the section of the cane is short. The early leaves are obviously greenish blue, and later become yellow-green. The tips of the leaves and the leaf margins are dry. Some of the leaves can show a clear purple and abnormal upright posture. When sugarcane is seriously deficient in phosphorus, the plant leaves are very narrow and produce a lot of white party and party and freckles. Second, the prevention and control methods: 1, the application of phosphate fertilizer to early, it is best to use as a base fertilizer. 2. Cultivate early and increase phosphate fertilizer. Apply as close to the root system as possible so that sugarcane is easily absorbed. 4. Conditional fertilization can be conducted. When the concentration of phosphoric acid in the soil meets the needs of sugarcane, the application of phosphate fertilizer is useless; while slightly acidic soil can increase the solubility of phosphorus, so the effect of applying phosphate fertilizer is good, and the use of slightly alkaline calcium magnesium phosphate fertilizer in acid soil is better than that of using superphosphate. .

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