Adding P and K fertilizers to winter onion

Winter onion tends to appear lodging. If there is more rain and humidity in winter, the lodging will become more serious. The main reason is that the onions grown in winter grow vigorously with less light and the plants are softer. It is recommended to control nitrogen fertilizer and increase phosphorus and potassium fertilizers. This can effectively control plant growth, increase plant stiffness, and prevent lodging. The specific approach is as follows.

When the onion height is 7-10 cm, 15-20 centimeters, and 25-30 centimeters, each root is applied with a 300-500-fold potassium dihydrogen phosphate aqueous solution, or an 800-1000-fold aqueous solution of Phosphorus Potassium No. 1 each time. Application 8 ~ 10 kg / square meter, evenly applied in the soil around the roots of onion plants, with fertilizer solution completely infiltrated into the soil. At the same time, phosphorus and potassium fertilizers were added from the foliage. Spray 25 to 30 times of superphosphate and dry pure grass wood ash to leaching clear liquid every 7 to 10 days, or 1000 times of Green Fenway 1 and 1,000 times of Green Fenway 3, or 0.2% to 0.3% Aqueous potassium dihydrogen phosphate solution, or 800 ~ 1000 times the amount of phosphorus phosphorus potassium solution No. 1, continuous spraying 3 to 5 times, evenly wet all stems and leaves, in order to start dropping drops is appropriate.

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