中阳木枣的优树选择研究

Superior tree selection of Chinese date Zhongyang muzao in Jiaxian County,Shaanxi

1 994～ 1 998年 ,通过对佳县中阳木枣分布区的调查 ,经过初选、复选和决选的选优程序 ,共选出中阳木枣优树 1 3株 ,1 1个性状的统计分析表明 ,平均树冠投影产量、枣吊比、平均单果重、最大单果重、制干率、干枣含糖量均超过优树选择标准 。

Based on the through investigation of Chinese date Zhongyang Muzao genetic resource in Jiaxian County,Shaanxi Province from 1994 to 1998,13 superior trees were selected by the methods of preliminary selection,secondary seletion and finalseclection.Statistical analysis of 11 traits shows that mean yield per area of crow shadow,rate of fruit to bearing branch,mean fruit weight,maximum fruit weight,rate of dried and sugar content of dried jujube of the superior trees are higher than those of the superior tree selection standard,and meanwhile demonstrates obviously the superior clone characters.