影响宁夏大罗山青海云杉林烟翅腮扁叶蜂发生的关键因子  

Key factors affecting occurrence of Cephalcia infumata(Hymenoptera:Pamphiliidae)in Picea crassifolia forest in Daluoshan Mountain,Ningxia

作　　者：兰珍珍 王新谱[1] 张鑫[1] 乔丽娜 马嘉瑜 施兴文 LAN Zhenzhen;WANG Xinpu;ZHANG Xin;QIAO Lina;MA Jiayu;SHI Xingwen(College of Agriculture,Ningxia University,Yinchuan 750021,China;Ningxia Luoshan National Nature Reserve Management Bureau,Wuzhong 751999,China)

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

出　　处：《植物保护》2024年第4期183-188,共6页Plant Protection

基　　金：宁夏回族自治区重点研发计划(2021BEG02009)。

摘　　要：明确烟翅腮扁叶蜂Cephalcia infumata Zhang&Wei的发生与青海云杉Picea crassifolia Kom.林林分因子和立地因子间的关系,探索影响烟翅腮扁叶蜂虫口密度的关键因子,对监测青海云杉林烟翅腮扁叶蜂虫口密度具有重要的指导意义。2022年-2023年在宁夏大罗山烟翅腮扁叶蜂主要分布区域的不同林型中设立16块20 m×20 m的样地,调查林分因子、立地因子,以及烟翅腮扁叶蜂虫口密度。通过逐步回归分析筛选出草本盖度(x_(7))、郁闭度(x_(2))和冠幅(x_(5))是影响2022年-2023年烟翅腮扁叶蜂发生的关键因子,建立了虫口密度的线性预测模型,y=-50.205-50.758 x_(7)+111.633 x_(2)+2.916 x_(5)。其中,草本盖度与烟翅腮扁叶蜂幼虫平均虫口密度呈极显著负相关关系(P<0.01,t=6.169),郁闭度与烟翅腮扁叶蜂幼虫平均虫口密度呈极显著正相关关系(P<0.01,t=3.345),冠幅与烟翅腮扁叶蜂幼虫平均虫口密度呈显著正相关关系(P<0.05,t=5.724)。因此在宁夏大罗山青海云杉林郁闭度和冠幅大、草本盖度低的林地烟翅腮扁叶蜂易发生,应作为监测重点区域,为提前预防虫害的发生做准备。This study aimed to identify the relationship between the occurrence of Cephalcia infumata Zhang&Wei and the stand characteristics and site conditions of Picea crassifolia forest,and explore the key factors affecting the population density of C.infumata,which has important guiding significance for monitoring the population density of C.infumata in P.crassifolia forest.A total of 16 plots(20 m×20 m)were set up in different forest types in the main distribution area of C.infumata in Daluoshan Mountain,Ningxia,and the stand factors,site factors and population density of C.infumata were investigated.By stepwise regression analysis,herb coverage(x_(7)),canopy(x_(2))and crown width(x_(5))were identified as the key factors affecting the occurrence of C.infumata from 2022 to 2023 and a linear prediction equation model of population density was established,y=-50.205-50.758 x_(7)+111.633 x_(2)+2.916 x_(5).Among them,there was a negative correlation between herb coverage and average population density of C.infumata(P<0.01,t=6.169),a significant positive correlation between canopy coverage and average population density of C.infumata(P<0.01,t=3.345),and a significant positive correlation between crown width and average population density of C.infumata(P<0.01,t=5.724).Therefore,C.infumata is prone to occur in P.crassifolia forest with large canopy and crown width and low herb coverage in Daluoshan Mountain,Ningxia,which should be a key monitoring area to prepare for prevention of insect pests in advance.

关 键 词：青海云杉 林分因子 立地因子 烟翅腮扁叶蜂 虫口密度 

分 类 号：S763.3[农业科学—森林保护学]