Symptoms and Control methods of phosphorus deficiency in Sugarcane

First, the symptoms of phosphorus deficiency in sugarcane: underdeveloped roots, slow growth and few tillers. The growth of the aboveground part is poor, the sugarcane node is short, the leaves are obviously green-blue at the initial stage, and then become yellowish green, the leaf tip and leaf edge are dry, and some leaves can show obvious purple and abnormal upright posture. When sugarcane is seriously deficient in phosphorus, the leaves of the plant are very narrow and produce a large number of white parties and freckles. Second, prevention and control methods: 1, the application of phosphate fertilizer should be early, it is best to use it as base fertilizer when planting. 2. Ploughing should be advanced and phosphate fertilizer should be increased. Apply as close to the root system as possible to make sugarcane easy to absorb. 3. Soil testing and fertilization can be carried out if possible. When the concentration of phosphoric acid in the soil meets the needs of sugarcane, the application of phosphate fertilizer is useless, while the slightly acidic soil can increase the solubility of phosphorus, so the effect of applying phosphate fertilizer is good, and the application of slightly alkaline calcium magnesium phosphate fertilizer in acidic soil is better than calcium superphosphate.