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作 者 ：向玉英 郭树云

期 刊 ：林业科学 1997年 33卷 zk1期 页码：99-104

关键词：水泡型溃疡病；材积损失率；北京杨。群众杨；

Keywords:Dothiorella gregaria, Volume loss rate of timber, Populus×beijingensis, Populus×xiaozhuanica cv．popularis’,

摘 要 ：采用人工林自然发病和人工接种模拟发病方法，研究了水泡溃疡病为害后对北京杨、群众杨幼林生长和材积损失影响。结果表明，随着病斑数量增大，病情为害加重，材积损失相应增加，病情指数与材积损失率呈正相关；经计算机作回归运算所得的材积损失模型，可作为溃疡病对杨树幼林材积损失估测的依据；主干上病斑在25个以下时，对3—4年生的植株单株材积损失影响不显著，材积损失率在10％以下；病斑在25个以上时。对植株树高、胸径生长开始有影响，特别是病斑圈绕树干时，对植株的胸径生长影响较大，单株材积降低较明显，即植株病斑横向长度达树干周长3/4时，其材积比健康植株减少约50％。

Abstract:The effects of the Dothiorella gregaria canker caused by natural and artificial inoculation on the growth and volume loss rate of young poplar trees were studied．The results showed that the num-bers of spots on stem were positively related to the disease index and volume loss rate．The height and breast height diameter of trees were effected by the number of the spots on stem (over 25)．When the spots spread around the stem．the loss rates of breast height diameter and volume became prominent．The cankers mainly occurred on little vesicles (about 0.8 cm in diameter)of young trees stem．As，trees grew older the disease resistence became stronger and the disease incidence and vol-ume loss rate dropped．The control methods should be taken at the developmental stage of young poplar trees，so as to reduce the disease incidence and loss of growth and volume．

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