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›› 1985, Vol. 21 ›› Issue (2): 206-209.

• 研究简报 • 上一篇    下一篇

沙枣褐斑病(Septoria argyraea Sacc.)对寄主根瘤固氮活性和生长量的影响

高雅   

  1. 中国科学院林业土壤研究所
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1985-05-25 发布日期:1985-05-25

THE EFFECT OF LEAF-SPOT (SEPTORIA ARGYRAEA SACC.) ON THE NITROGEN-FIXATION AND THE GROWTH OF OLEASTER

Gao Ya   

  1. Institute of Forestry and Pedology,Academy Sinica
  • Received:1900-01-01 Revised:1900-01-01 Online:1985-05-25 Published:1985-05-25

Abstract: The oleaster leaf-spot caused by Septoria argyraea Sacc.is a discase of oleaster tree which is an important nitrogen fixation woodly plant.Some nodules exist on its root,which can fix the nitrogen from air.As more the leaf spots produced the damages are resulted.The number of nodules appeared to be correlated to the serious grave of the disease.Experiment shows that the damages produced by the disease are: Lowing the number of the nodules. Weakening the activity of N-fixation of the nodules. Decreasing the growth race as well as the Nitrogen content of the plant. Because of the disease,infected plant are 3—6 times less than normal plant in dry weight,3—16 times in number of nodules,21—100 times in centent of the nitrogen fixation.