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通过组建自然种群生命表来研究比较受害松林与未受害松林间马尾松毛虫Dendrolimus punctatus Walker的种群动态。结果表明,在未受害松林中马尾松毛虫的存活率达15.33%,种群趋势指数为24.0489;在受害松林中马尾松毛虫的存活率为0.61%,种群趋势指数为0.4864。在受害松林中的总K值(3.2183)也要远远大于未受害松林中的总K值(0.8146)。在未受害松林中易引起马尾松毛虫种群数量的剧增,而在受害的松林中马尾松毛虫的种群呈下降趋势。这一结果表明受害的松林本身对马尾松毛虫种群具有一定的自然调控作用。
The natural population life table was used to study the population dynamics of Dendrolimus punctatus Walker between pine forests and uninhabited pine forests. The results showed that the survival rate of Pinus massoniana in untreated pine forest was 15.33%, and the population trend index was 24.0489. The survival rate of Pinus massoniana in the damaged pine forest was 0.61%, and the population trend index was 0.4864. The total K value (3.2183) in the affected pine forests was also much larger than the total K value (0.8146) in the unmanaged pine forests. The population of Dendrolimus punctatus in the uninvolved pine forest could easily lead to a sharp increase, while the population of Dendrolimus punctatus in the damaged pine forest decreased. This result shows that the damaged pine forest itself has a certain natural regulation on the population of Dendrolimus punctatus.