(续上期9页) 三、生物学及栽培 杏成花容易但花而不实现象较普遍,幼旺树退化花比率一般在85%以上,是杏早期丰产的严重障碍,衰老树退化花比率也高,影响到丰产稳产,东亚品种比欧洲品种严重得多。关于杏雌芯退化的研究谢清业等(1982)分析表明,结果枝的粗/长比与退化花比率间为显著 (Continued on page 9) Third, biology and cultivation of apricot flowers easily but not as a result of flowers and more common, the rate of degenerated flowers is usually more than 85%, is a serious obstacle early apricot yield, the rate of deterioration of the old tree flowers Is also high, affecting the high and stable yield, East Asia is much more serious than the European varieties. On the apricot female core degradation Xie Qingye et al (1982) analysis showed that the results of the branch of coarse / long ratio and degenerate flower ratio was significant