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在野外样地调查数据的基础上,对黄河三角洲人工刺槐枯梢特征进行了统计分析,结果表明:研究地区人工刺槐林断顶、枯梢及死亡率为41.4%。依据样地树高和胸径调查数据,将239棵人工刺槐分为三类,调查表明,随着树龄的增加人工刺槐枯梢率由18.2%上升到36.3%,该地区人工刺槐枯梢程度服从(4.04,2.27)的正态分布,中度、重度和死亡刺槐占枯梢及死亡刺槐的66.7%,这表明黄河三角洲人工刺槐枯梢严重,需要及时进行人工刺槐林枯梢监测相关机理研究与综合管理。
Based on the field survey data, the statistic analysis of the tops of artificial black locust in the Yellow River Delta shows that the top, the shoot and the mortality of Artificial Robinia pseudoacacia in the study area are 41.4%. According to the survey data of tree height and DBH, 239 artificial acacia locusts were divided into three groups. According to the survey, with the increase of the age, the shoot acuity rate increased from 18.2% to 36.3% 4.04 and 2.27). The moderate, severe and dead R. pseudoacacia accounted for 66.7% of the dead and dead R. pseudoacacia, which indicated that the severe black locust of the artificial R. pseudoacacia in the Yellow River Delta needed to be studied and synthesized in time. management.