宁夏罗山松阿扁叶蜂幼虫发生的关键影响因子  

Key factors affecting the occurrence of Acantholyda posticalis larvae in Luoshan Mountains,Ningxia

作　　者：兰珍珍 王新谱[1] 施兴文 董川 LAN Zhenzhen;WANG Xinpu;SHI Xingwen;DONG Chuan(School of Agriculture,Ningxia University,Yingchuan 750021,Ningxia,China;Luoshan National Nature Reserve Administration of Ningxia,Hongsipu 751999,Ningxia,China)

机构地区：[1]宁夏大学农学院,宁夏银川750021 [2]宁夏罗山国家级自然保护区管理局,宁夏红寺堡751999

出　　处：《浙江农林大学学报》2024年第4期735-743,共9页Journal of Zhejiang A&F University

基　　金：宁夏回族自治区重点研发计划项目(2021BEG02009)。

摘　　要：【目的】研究松阿扁叶蜂Acantholyda posticalis幼虫的发生与林分因子和立地因子的关系,筛选影响松阿扁叶蜂幼虫发生的关键因子。【方法】2022—2023年,在宁夏罗山国家级自然保护区松阿扁叶蜂主要发生区域设立21块样地,调查松阿扁叶蜂幼虫虫口密度和林分因子及立地因子。应用逐步回归分析法筛选出影响松阿扁叶蜂幼虫平均虫口密度的关键因子;采用方差分析和相关性分析法得出松阿扁叶蜂幼虫平均虫口密度与关键因子之间的关系。【结果】逐步回归法筛选出草本盖度、冠幅、郁闭度和坡位是影响松阿扁叶蜂幼虫发生的关键因子。根据关键因子建立了幼虫平均虫口密度的线性预测方程。筛选出的4个关键因子中,草本盖度和坡位对松阿扁叶蜂幼虫的发生有抑制作用,冠幅和郁闭度对松阿扁叶蜂幼虫的发生有促进作用。【结论】松阿扁叶蜂幼虫在林下草本盖度低、林分郁闭度和冠幅大的上坡位林地易发生。建议将这些林地作为防治重点区域,调整位于上坡位的林木草本盖度至0.3以上,冠幅至2.5 m以下,郁闭度至0.7以下,实现对宁夏罗山松阿扁叶蜂幼虫种群数量的生态控制。[Objective]The objective is to study the relationship between the occurrence of Acantholyda posticalis larvae and stand and site factors,and screen out the key factors affecting the occurrence of A.posticalis larvae.[Method]21 sample plots were set up from 2022 to 2023 in the main occurrence areas of the larvae in Luoshan National Nature Reserve of Ningxia to investigate the larval population density of A.posticalis,stand factors and site factors.Using stepwise regression analysis,the key factors affecting the average population density of A.posticalis larvae were screened out.The relationship between mean population density and key factors was obtained by variance analysis and correlation analysis.[Result]By stepwise regression analysis,it was found that herb coverage,crown width,canopy density,and slope position were the key factors affecting A.posticalis larval occurrence.A linear prediction equation for the average larval population density was established based on the key factors.Among the 4 key factors selected,herb coverage and slope position inhibited the larval occurrence,while crown width and canopy density promoted the larval occurrence.[Conclusion]Larvae of A.posticalis are easy to occur in uphill forest areas with low herb coverage,high canopy density and crown width in the understory.It is suggested that these forest areas be taken as the key areas for prevention and control,and herb coverage be adjusted to above 0.3,crown width below 2.5 m and canopy density below 0.7,so as to realize the ecological control of the larval population of A.posticalis in this area.

关 键 词：松阿扁叶蜂 平均虫口密度 草本盖度 冠幅 郁闭度 坡位 

分 类 号：S763[农业科学—森林保护学]