During the growth process of wheat, timely applying foliar spray fertilizer according to the seedling conditions, it not only uses less fertilizer, saves the cost, but also has quick effect and promotes production increase. Practice has proved that wheat spraying foliar before heading can prevent the degradation of small flowers, increase the number of grains and grain weight; in the early stage of grain filling and foliar spray fertilizer, can promote the accumulation of nutrients, so that the grain is full. Therefore, spraying fertilizer on wheat leaves is an important measure to increase production. 1. For wheat seedlings with faded leaf color and defertilizers, nitrogenous fertilizers are mainly used, combined with phosphorus and potash fertilizers. Spray urea concentration of 1% to 2%, spraying 50-75 kg per acre solution. 2. For seedlings with slow growth, red tip and leaf margins or stalks, sprayed with phosphate fertilizer, with nitrogen fertilizer. This wheat seedling, sprayed with calcium phosphate, the concentration of 3%, will be 1.5 kilograms of superphosphate into powder, add 10 kilograms of water, stir, soak 1 day and night after filtration, the filtrate and then add water 40 kilograms spray, spray per acre 50 to 57 kg. 3. The green color of the leaf is dark green, the growth is vigorous, and the glutinous green and late-maturing wheat seedlings are sprayed with potassium fertilizer as the main component of the phosphate fertilizer. The wheat seedlings are sprayed with potassium dihydrogen phosphate at a concentration of 0.3% to 0.5%, that is, 150 to 250 grams of water and 50 kilograms of water sprayed, and each spray solution of 50 to 60 kilograms per acre. 4. Distorted or yellowish-white spots, stems and leaves, and crisp and breakable wheat seedlings are mainly sprayed with trace elements, combined with nitrogen and phosphate fertilizers. The wheat seedlings are sprayed with zinc sulfate or boric acid at a concentration of 0.1% to 0.2%, and each sprays a solution of 50 to 60 kg per acre. 5. For the appearance of leggy, may appear lodging of wheat seedlings, mainly to spray chlorella, with potash. This kind of wheat seedlings uses 50 to 57 grams of chlorella per acre and 50 to 75 kg of water per acre. The foliar spraying of wheat should be carried out before heading and during the initial stage of grouting. It is advisable to spray on cloudy days or sunny days from 4 o'clock to evening.
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