马尾松天然次生林松墨天牛诱捕影响因素分析

Research of the Influence Factors on Monochamus alternatus Trapping in the Natural Secondary Forest of Pinus massoniana

2014年3月底—10月初,在武夷山地区马尾松天然次生林内设置7个试验点,使用漏斗型诱捕器、FJ-MA-02型引诱剂对松墨天牛进行诱捕试验。结果表明,松墨天牛诱捕量从4月开始上升,高峰期为6—8月(占总诱捕量的80.22%),最高峰为7月中旬。主成分分析表明,林分条件和立地因子对诱捕量有着重要影响;以诱捕量进行多项式拟合,拟合效果较好(P均<0.05)。诱捕量随着海拔高度的升高呈先上升后下降趋势,林分郁闭度、林龄、林分密度对诱捕量有促进效应,而平均胸径、平均树高对诱捕量有抑制效应。说明马尾松天然次生林松墨天牛的诱捕需在成虫羽化期前开始,并根据立地因子和林分条件调整诱捕器挂设位置和密度,以提高诱捕效果。

The Monochamus alternatus trap experiment was carried out in 7 sites in the natural secondary forest of Pinus massoniana in Wuyishan mountain area using a funnel type trap and FJ-MA-02. The resuhs showed that the amount of attracting M. alternatus in- creased form April,higher values were obtain in June-August （accounted for 80. 22% of the total amount） ,with the highest vale in the middle of July. Principal component analysis （PCA） showed that the stand and site factors were important to the trapping a- mount, with well polynomial fitting （ all P 〈 0. 05 ）. The trapping amount increased with increasing altitude firstly and then de- creased. The stand condition of the canopy density, stand age and canopy density has promoting effect in the trapping amount, while stand diameter and height had inhibitory effect. Therefore, in the practice of the M. alternatus trapping, the trapping should be started as early as possible as the early stage of adult emergence, and set suitable location and density of trapping equipment in different stand condition.