Spraying foliar fertilizer on fruit trees timely can achieve the purpose of strong trees, disease resistance and high yield. The method is simple and effective. The technical points are as follows:
The suitable period for foliar spraying
It can be sprayed throughout the growing season, but it is best to spray when the fruit tree needs the most fertilizer and is lacking. As far as fertilizers are concerned, the fruit trees have different growth periods and the demand for fertilizers varies. Before and after budding, leaf spreading and flowering, nitrogenous fertilizer should be sprayed to promote flower bud differentiation and increase fruit setting rate; Spraying 0.2%-0.4% boric acid mixed solution during flowering period can significantly increase fruit setting rate; Xintuowang long-term to fruit enlargement period Spraying 2%～3% of superphosphate soaking filtrate can increase the sugar content of fruit; Spraying 0.2%～0.3% potassium dihydrogen phosphate solution during fruit expansion can significantly promote fruit enlargement and improve fruit quality. It can also reduce fruit drop.
Leaf spraying time and method
Foliar spraying fertilizer effect is greatly affected by the wind and temperature, generally should be sprayed on a cloudy day without wind, summer spray fertilizer should be carried out before 10 o'clock in the morning or after 4 o'clock in the afternoon.
Fertilizer concentration should be appropriate
When fertilizing the leaves, different growth periods and climatic conditions of the fruit trees and different concentrations of the tree species are used. The concentration of the young trees is low, and the density of the mature trees is higher.
Although there are many advantages, foliar spray fertilizer can only be used as a supplement to soil fertilization.
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