1, the benefits of spraying foliar fertilizer: wheat root absorption fat absorption capacity decreased, so it is necessary to seize the critical period of wheat production - the formation of wheat production during this period, the widespread implementation of "one spray and three defenses" technical measures, namely in the foliage Potassium dihydrogen phosphate and urea were sprayed to reduce the yield by supplementing the root system to reduce the supply of wheat leaves, thus delaying the root senescence, extending the flag leaf functional period, reducing the dry hot wind damage, preventing lodging, increasing the speed of grain filling, and increasing grain weight. , In order to increase production, according to the soil fertilizer station in recent years, the result of the foliar fertilizer experiment, wheat from the flowering to the spraying twice foliar fertilizer, can increase production by about 5% -8%, significant increase in production.
2, the conventional use of foliar fertilizer: generally in the heading - filling stage of wheat 2-3 times a continuous spray fertilizer, optional 0.5-1% urea and 0.2-0.3% potassium dihydrogen phosphate mixture. For the high-yield super-high-yield wheat must be foliar spray fertilizer, because high-yield super-high-yield wheat acres more spikes, and large spikes, grain full, late in the case of dry hot wind easy to lodging, so combined with disease prevention and pest control can play a "three spray "Effect.
3. The special usage of foliar fertilizers: under the conditions of deteriorating climatic abnormal environment, it is necessary to create high wheat yields. In addition to root fertilization, foliar fertilization techniques should be fully utilized, especially for high-temperature drought or hoarded water fields, or In the case of cold injury or wheat injury, the application of foliar fertilizer should be carried out in a timely manner. The optional amino acids or urea plus potassium dihydrogen phosphate mixture can be used to reduce disasters, increase resistance, and increase production.
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