Symptoms: Peach with heavy phosphorus deficiency, new leaves are small, veins on the petioles and leaves of the back are purple-red, followed by bronze or brown, and leaves and branches are at right angles.
Control methods: increase organic fertilizers, improve the soil is an effective way to prevent phosphorus deficiency. The application of superphosphate or potassium dihydrogen phosphate, the effect of preventing phosphorus deficiency is obvious. However, it must be noted that excessive application of phosphate fertilizers can cause copper deficiency and zinc deficiency.
1. Apply ripe organic fertilizer in autumn. The application amount is 2 to 3 times of the peach fruit yield, and the superphosphate and potassium dihydrogen phosphate are mixed into the organic fertilizer and applied together, and the effect is better.
2, topdressing quick-acting phosphate fertilizer. Can be applied to diammonium phosphate or special fertilizers, mild phosphorus-deficient tablets, sprayed with 0.1% to 0.3% potassium dihydrogen phosphate solution 2 to 3 times during the growing season, can ease the symptoms.
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