1、要有足够的喷洒量。果树叶面肥液的存留量和吸收量呈正比,而在一定范围内,叶面上的存留量又和喷洒量成反比。适宜的喷洒量是肥液在叶片上呈欲滴未滴的状态。 2、避免肥液迅速干燥。高温、低湿是促进肥液变干的主要因素,据我们的实践,根外追肥的最佳温度为18～25C。因此,夏季喷肥最好在下午4时后进行,以提高效果。 1, have enough spray volume. Fruit foliar fluid retention and absorption is proportional to, and within a certain range, the retention of the leaves and spray volume is inversely proportional to. Appropriate amount of spray fertilizer is dripping on the leaves did not drip state. 2, to avoid rapid liquid fertilizer drying. High temperature, low humidity is the main factor to promote the fluid to dry, according to our practice, the best temperature for top dressing is 18 ~ 25C. Therefore, it is best to spray fertilizer in summer after 4 pm in order to enhance the effect.