两种小蠹发生与林分和立地因子间的关系及最佳抽样模型  

The Relationships between the Occurrence of Two Kinds of Bark Beetles and Stand and Site Factors,and the Optimal Sampling Model

作　　者：兰珍珍 王新谱[1] Lan Zhenzhen;Wang Xinpu(Ningxia University,Yinchuan 750021,P.R.China)

机构地区：[1]宁夏大学,银川750021

出　　处：《东北林业大学学报》2025年第5期116-121,135,共7页Journal of Northeast Forestry University

基　　金：宁夏回族自治区重点研发计划项目(2021BEG02009)。

摘　　要：为监测和防控宁夏罗山针叶林主要害虫的发生,研究黑根小蠹(Hylastes parallelus)和云杉四眼小蠹(Polygraphus poligraphus)幼虫与林分和立地因子间的关系及最佳抽样模型。以宁夏罗山危害油松(Pinus tabuliformis)林的黑根小蠹幼虫和危害青海云杉(Picea crassifolia)林的云杉四眼小蠹幼虫为研究对象,分析小蠹危害率与林分及立地因子间的关系,同时确定小蠹幼虫致死林木种群密度和最佳抽样模型。结果表明:黑根小蠹幼虫易在下坡位和海拔低的林地危害油松,该幼虫在罗山致死油松的种群密度范围为24.6~56.4头·dm^(-2);云杉四眼小蠹幼虫易在下坡位、险坡的林地危害青海云杉,该幼虫在罗山致死青海云杉的种群密度范围为25.9~59.8头·dm^(-2)。当黑根小蠹、云杉四眼小蠹幼虫密度为25~60头·dm^(-2)时,黑根小蠹幼虫抽样模型为n_(1)=(t/D)^(2)·0.57·χ^(-0.08),云杉四眼小蠹幼虫抽样模型为n 2=(t/D)^(2)·4.15·χ^(-0.63)。在宁夏罗山,黑根小蠹的防控应重点关注分布于下坡位、海拔低的油松林地,云杉四眼小蠹的防控应重点关注分布于下坡位、坡度大的青海云杉林地。In order to monitor,prevent and control the occurrence of the main pests in the coniferous forests of Luoshan in Ningxia,the relationships between the larvae of Hylastes parallelus and Polygraphus poligraphus and stand and site factors,as well as the optimal sampling models,were studied.Taking the larvae of H.parallelus that damaged Pinus tabuliformis forests and the larvae of P.poligraphus that damaged Picea crassifolia forests in Luoshan,Ningxia as the research objects,the relationships between the damage rates of bark beetles and stand and site factors were analyzed,and at the same time,the population densities of the trees killed by the bark beetle larvae and the optimal sampling models were determined.The results showed that the larvae of H.parallelus were prone to damage P.tabuliformis in the forest lands at the lower slope positions and lower altitudes.The population density range of these larvae that killed P.tabuliformis in Luoshan was 24.6-56.4 individuals·dm^(-2).The larvae of P.poligraphus were prone to damage P.crassifolia in the forest lands at the lower slope positions and steep slopes.The population density range of these larvae that killed P.crassifolia in Luoshan was 25.9-59.8 individuals·dm^(-2).When the larval densities of H.parallelus and P.poligraphus were between 25 and 60 individuals·dm^(-2),the sampling model for the larvae of H.parallelus was n_(1)=(t/D)^(2)·0.57·χ^(-0.08),and the sampling model for the larvae of P.poligraphus was n 2=(t/D)^(2)·4.15·χ^(-0.63).In Luoshan,Ningxia,the prevention and control of H.parallelus should focus on the P.tabuliformis forest lands distributed at the lower slope positions and lower altitudes,and the prevention and control of P.poligraphus should focus on the P.crassifolia forest lands distributed at the lower slope positions and with large slopes.

关 键 词：黑根小蠹 云杉四眼小蠹 坡位 海拔 坡度 抽样模型 

分 类 号：S433[农业科学—农业昆虫与害虫防治]