The grape planting skillfully applies foliar fertilizer to promote high yield. For the grape, the use of foliar fertilizer is a good measure. The grape sprays the foliar fertilizer, the leaves are widely affected by fertilizer, the fertilizer is quick, the labor is saved, and the fertilizer is commonly used. method. For best results in foliar application, the following technical points should be mastered:
Suitable period of spray fertilizer:
Generally speaking, foliar fertilizer can be applied during the whole growing season of the grape. It is best to spray “starting fertilizer†before the growth of the new shoot, and spray “stable flower steady fruit fertilizer†during flowering and fruit setting period; Apply "strong fruit fertilizer". The effect of spraying boron in flowering period is good; the effect of spraying rare earth micro-fertilizer in the initial stage of softening of berries is large; the appropriate amount of Jinbao bacterial fertilizer can be applied throughout the growth period, which can improve quality, increase yield and disease resistance.
Weather and time of spray fertilizer:
Foliar spray fertilizer, especially the application of Jinbao bacteria fertilizer, is greatly affected by wind, temperature and humidity. Within a certain range, the higher the temperature, the faster the fertilizer is absorbed by the leaf; the greater the humidity, the more the fertilizer is absorbed; the smaller the wind speed, the longer the moistening time of the fertilizer liquid on the blade, the more the fertilizer absorption and the smaller the drift loss, To improve the effect of spraying fertilizer, it is best to choose a windless cloudy spray. On sunny days, it should be carried out in the morning or evening when the temperature is suitable (18 °C -25 °C), humidity is high, evaporation is small.
The method of spraying fertilizer:
The cuticle of the young leaves of the grape is thinner than the old leaves, and the penetration of the fertilizer is large; the stomata on the back of the leaves are more than the front of the leaves, and the absorption is fast. Therefore, the grape leaf fertilization should be dominated by young shoots, young leaves and leaf backs. The effect of spraying fertilizer is to make the mist particles fine, so as to spread evenly, and spray the leaves to all the wet, and the fertilizer liquid is dripping without falling. It can be sprayed with various fertilizers as needed, and it can also be mixed with pesticides (including plant growth regulators) to prevent pests and diseases.
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