一、早施 9～10月是果树根系第三次生长高峰期,所以基肥在9月上旬施入为宜。苹果树应在早、中熟品种采收后,中晚熟及晚熟品种采收前施入。 二、浅施 苹果树的根系一般集中在距地表30cm左右,易受外界因素影响,因此基肥要适当浅施,深度以 First, as early as September to October is the third peak growth of fruit trees, so basal fertilizer applied in early September is appropriate. Apple trees should be early and middle-maturing varieties harvested, late-maturing and late-maturing varieties were harvested before. Second, the shallow application of apple tree roots generally concentrated in about 30cm from the surface, susceptible to external factors, so the base fertilizer should be appropriate shallow facilities, the depth of