Skillful application of wheat foliar fertilizer
Spraying time should be appropriate. According to the experiment, the spraying of wheat from the booting stage to the heading stage can significantly extend the functional period of the leaves and increase the grain yield, which is a high-efficiency period of spray fertilizer. In addition, due to the high temperature at noon on sunny days, large evaporation, and low fertilizer utilization rate, it is best to spray fertilizer at 9-11 o'clock and 2 o'clock in the afternoon on a cloudy day or sunny day. spray.
Look at the seedlings to determine the type and concentration. Phosphorus and potassium in potassium dihydrogen phosphate and plant ash can promote the synthesis and operation of wheat nutrients, accelerate grain filling and enhance plant lodging resistance; urea can improve grain quality and prevent premature aging. Therefore, it is best to spray 0.3% potassium dihydrogen phosphate on a large area of ​​normal or high-yielding wheat, spray 1%-2% urea solution on yellow thin and weak seedlings, or spray with diluted water to dilute twice the water. Apply a purple-red phosphorus seedling to the tip and sheath of the leaf and spray 2%-3% calcium perphosphate leaching solution. Spray the 10% ash leaching solution on the leaves and the densely growing Miao Miao.
The method of spraying fertilizer should be done properly. The fertilizer must be sprayed on green leaves or green stalks and wheat ears to function. At the same time, the wheat leaves have a lot of pores on the front and back, and should be sprayed with fertilizer. To spray evenly, the finer the droplets, the better. For wheat fields with heavy de-fertilization and poor grievances, or dry hot winds during the spraying period, increase the number of spraying fertilizers as appropriate.
In addition, for wheat fields where pests and diseases occur, an appropriate amount of pesticides can be added to the fertilizer solution. However, potassium dihydrogen phosphate should not be mixed with alkaline pesticides, such as stone sulfur mixture, Bordeaux mixture, etc., in order to avoid reaction and reduce fertilizer efficiency and efficacy.
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