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１９９７年，作者在河北职业技术师范学院果园，对１０株１９９０年定植的山楂树的某些开花结果习性进行了调查，现将调查结果简介如下。按调查山楂幼树的结果母枝分为长旺的（＞３０ｃｍ）、长的（１５～３０ｃｍ）、中长的（５～１５ｃｍ）和短的（＜５ｃｍ），以中结果...
In 1997, the author investigated the flowering habits of some 10 hawthorn trees planted in 1990 in the orchards of Hebei Vocational and Technical Teachers College. The survey results are summarized as follows. According to the results of the investigation of young hawthorn tree branches are divided into longwang (> 30cm), long (15 ~ 30cm), medium (5 ~ 15cm) and short (<5cm)