杏树花量大，但其自然坐果率极低，且落花落果严重。据1995－1997年在青龙县对山杏、龙王帽、一窝蜂、骆驼黄杏、大接杏调查，杏树落花落果有三次高峰，第一次在终花期（4月上中旬），落花率达95％；第二次在幼果形成期（4月中旬），落果率达51．4％；第三次在硬核前(5月上中旬 Apricot flowers, but its natural fruit setting rate is extremely low, and plum blossom serious. According to 1995-1997 in Qinglong County apricot, Longwangmao, swarms of camel Huang Xing, Daxian apricot survey, there are three peaks off the apricot tree flowers, the first in the final flowering (April mid-upper), falling rate of up to 95%; the second in the formation of young fruit (mid-April), fruit loss rate of 51.4%; the third in hard before (mid-May