松材线虫入侵对马尾松林植物群落功能的影响

Impact of Bursaphelenchus xylophilus's invasion on the function of plant community in Masson pine forests

该文以浙江省富阳市5块不同林型不同受害程度的松林为研究对象,从生长量、生物量和木材产出率的角度,分析了松材线虫入侵对马尾松林植物群落功能的影响.松材线虫入侵对林分生长的影响分析结果表明:松材线虫入侵松林后,对于受害松树不管是其被伐倒还是自然倒地之后,对周围活马尾松胸径和材积生长的影响均显著,而对树高生长的影响不显著.从生长量、生物量和木材产出率3个角度进行综合分析,结果表明:虽然在伐除受害木和利用引诱剂诱集主要传播媒介———松墨天牛等措施的干预下,使特定林分的平均生长水平出现了高峰,但要想保持受害区林分中未受害马尾松林木的平均生长量,还必须采取一系列保护措施.

Based on the research of five different forest types and different damage degrees after the invasion of Bursaphelenchus xylophilus（pine wood nematode,PWN） in Fuyang County,Zhejiang Province,from the view of growth increment,biomass dynamics and timber outturn,the changes of plant community＇s function caused by the invasion of PWN were analyzed.On one hand,the impact of PWN＇s invasion on the forest stand growth showed that the invasion of PWN had a significant impact on the diameter and volume growth of the pine,but PWN only seldom affected the height growth of the pine.On the other hand,the integrated studying result of the above function aspects showed that under the disturbance of removal of infected trees attractant,the average growth level of special stand reached a climax.Moreover,if the average growth increment of unattacked Masson pine in the infected forest stand is to be maintained,a series of protecting measures must be taken.