The growth of jujube tree leaves and flower development is almost at the same time, and the consumption of nutrients is more and more concentrated. Reasonable foliar spray fertilizer can quickly add certain nutrients.
Fertilizer spraying on the leaves of the jujube leaf surface should be carried out several times. It can be used in the physiological fruiting period of the jujube tree, that is, the final flowering period (from about late June to early July) and the rapid fruit growth period, that is, the fruit enlargement period (about 7~ August). Sprinkle fertilizer interval 5 to 7 days, continuous spraying 3 to 5 times, each tree 5 to 10 kg.
Fertilizer concentration suitable for jujube leaf surface spray fertilizer more fertilizer, the use of different concentrations, urea 0.30% to 0.50%, potassium dihydrogen phosphate 0.20% to 0.30%, boric acid 0.20% to 0.30%, multiple compound fertilizer 0.40 % to 0.50%. 0.30% urea + 0.20% potassium dihydrogen phosphate, 0.30% urea + 0.20% boric acid, 0.20% potassium dihydrogen phosphate + 0.20% boric acid can be used as a mixed fertilizer solution.
Fertilizing method The jujube tree canopies are tall and high-pressure sprayers should be used when spraying. High-pressure spray guns can be used on the upper part of the canopy to spray the entire tree evenly. Fertilizer nutrient absorption and utilization mainly through the back of the blade, pay attention to more spray back, in order to facilitate the absorption and utilization.
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