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春夏季节,果树花前花后是果树各种病害(生理病害、病原毒素病害)的易发阶段。在这一阶段除了必要的药剂预防外,适时增施磷钾肥也是一项较好的选择。但是不少果农往往在春节容易只追施氮素化肥,如尿素、高氮复合肥,而忽略了对磷钾肥的施用和补充。因此,从果树的生理需求和防病技术来说,在果树花前花后及时补施2～3次适量磷钾肥很有必要。磷元素与钾元素是果树抗病的
Spring and summer, fruit trees before flowering is a variety of diseases of fruit trees (physiological diseases, pathogenic toxin disease) prone phase. In addition to necessary preventive measures at this stage, it is also a better choice to add phosphorus and potassium fertilizer in a timely manner. However, many farmers often tend to chase nitrogenous fertilizers, such as urea and high-nitrogen compound fertilizers, while neglecting the application and supplement of phosphorus and potassium fertilizers. Therefore, from the physiological needs of fruit trees and disease prevention technology, in the fruit tree flower timely replenishment 2 or 3 times the amount of phosphorus and potassium fertilizer is necessary. Phosphorus and potassium are disease-resistant in fruit trees