Good effect of spraying foliar fertilizer on grapes

Appropriate period of spray fertilizer In general, the application of foliar fertilizer can be applied in the whole growth season of grapes, especially the effect of microbial fertilizer. Before the growth of new shoots, “pushing fertilizer” is sprayed to spray “stabilize the stable fruit fertilizer” during flowering and fruit setting, and “strong fruit fertilizer” is sprayed during fruit enlargement. Spraying boron fertilizer at flowering stage has good effect; berry softening has a large role in the initial spraying of rare earth micro-fertilizer; appropriate bacterial fertilizer can be applied throughout the growing period to improve quality, increase yield and disease resistance.

Fertilizer spraying weather and time foliar spray fertilizer, especially spraying fertilizer, affected by wind, temperature and humidity. Within a certain range, the higher the temperature, the faster the leaves suck fat; the higher the humidity, the more fertilizers are sucked in; the smaller the wind speed, the longer the moisturizing time of the fertilizer solution on the leaves, the more suction fat and the smaller the loss of drift. To improve the effect of spray fertilizer, it is best to choose a cloudy, cloudy, and sunny day. In sunny days, it should be performed in the morning or in the evening when the temperature is suitable (18°C～25°C), humidity is high, and evaporation is small.

Spray fertilizer method The cuticle of grape leaves is thinner than the old leaves, and the penetration amount of fertilizer liquid is large. The stomata on the back side of the leaves are more than the front of leaves, and the absorption is fast. Therefore, the application of grape leaf fertilizer should be based on young shoots, young leaves and the back of leaves. Fertilizer fertilizes the fine grain of the fog so as to make it evenly and densely. It sprays all the leaves wet, and the fertilizer drops without falling. According to the needs of a variety of fertilizers mixed spraying, but also with pesticides (including plant growth regulators) mixed spray and prevent pests.

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