大山楂座果率很低,花果脱落率达80～90％,严重影响产量。目前,虽然有加强综合管理,盛花期喷洒赤霉素和修剪等措施,不同程度提高了山楂的座果率。但是,从山楂本身的生物学特性及授粉受精特点等方面的研究的不多。为了弄清山楂授粉受精的特点和异花授粉的作用,我们于1979～1982年进行了山楂授粉试验。一、材料和方法四年试验,选地势、土质、管理条件基本相似,树势比较好的山楂树,处理与对照设在同一棵树的相对方向或树势比较均匀的主枝上。于含苞待放期授粉并套袋,一周左右摘袋。分别在开花后两周和四周调查座果率,并 Big hawthorn fruit rate is very low, fruit flower off rate of 80 to 90%, seriously affecting the yield. At present, although the measures such as strengthening integrated management, spraying gibberellin at full bloom and pruning are taken, the fruit yield of hawthorn has been raised to varying degrees. However, there are not many studies on the biological characteristics of hawthorn itself and the characteristics of pollination and fertilization. In order to understand the characteristics of hawthorn pollination and cross-pollination, we carried out the hawthorn pollination experiment from 1979 to 1982. Materials and methods Four years of experiment, the selected topography, soil quality and management conditions were basically similar. The hawthorn tree with better tree vigor was treated and compared with the control in the relative direction of the same tree or with more uniform tree branches. Peach budding to be put on and bagging, bagging a week or so. Fruit rate was investigated two weeks and four weeks after flowering, respectively