【摘要】 介绍了用不同树龄的合欢树进行生物电震前前兆异常试验观测的情况。结果表明，树龄越大、树根越深、映震效果越明显。指出，为保证观测效果，应选择树龄大于１０ ａ 的合欢树作为地震前兆观测的对象。更多还原

【Abstract】 The observation and trials of precursor anomalies before earthquake of bioelectr ic potentials different aging silk tree are introduced . The conclusion showed t hatthe largeristree aging and the deeperistree root,the better is effectr eflection earthquake .Itis suggestthat more than ten yearstree should be chos en to serve as observation object of earthquake precursor so as to ensure observ ed effect .更多还原