It is the right time to apply potassium to pineapple

At present, the pineapple winter fruit has entered the rapid expansion and color-changing maturity period, and there is a large demand for potash fertilizer. if the potash fertilizer supply is sufficient, the pineapple winter fruit can expand rapidly and fully mature, the fruit is large, the fruit shape is correct, the fruit is full, the pulp is sweet, the fruit juice is rich, the aroma is strong, the color is good, the pericarp is golden, and it is resistant to storage and transportation. Otherwise, the fruit is thin and small, the cold resistance is weak, it is vulnerable to freezing injury, the yield is low and the quality is poor. Therefore, in the pineapple winter fruit expansion and ripening period, attention should be paid to the application of potassium fertilizer in order to increase the yield and improve the quality. The specific fertilization methods of potassium supplement for pineapple in winter are as follows: during the expansion and ripening of pineapple winter fruit, apply potassium fertilizer once to the root of pineapple, applying 50kg potassium sulfate per mu, evenly apply it to the soil around the root of pineapple plant, and then cultivate a thin layer of soil. just cover it with potash. In addition, the heart was perfused with 250 × 300-fold potassium dihydrogen phosphate aqueous solution once, 0.5 × 1 kg per plant, from the trumpet at the top of the pineapple plant, so that the aqueous solution of potassium dihydrogen phosphate flowed along the leaf sap to the root soil. At the same time, foliar topdressing was carried out every 7 to 10 days, spraying 3 times continuously for 5 times, spraying with 250 × 300 times potassium nitrate solution, 800 times 1000 times Xingming phosphorus potassium solution, or 500 times 600 times nucleotide potassium solution to wet all leaves evenly, in order to start to drip down water droplets and supplement potassium fertilizer from the leaves.