摘要
【目的】明确不同立地条件下栓皮栎纯林和栓皮栎-侧柏混交林食叶害虫危害的变化特征,为中国栎类林结构优化、食叶害虫生态调控及其可持续经营提供基础数据和理论支撑。【方法】以栓皮栎(Quercus variabilis Bl.)作为目标树种,通过比较分析不同立地条件(海拔、坡度、坡向、枯落物厚度和枯落物覆盖度)下栓皮栎纯林和栓皮栎-侧柏混交林食叶害虫危害程度的差异及分布情况,探究影响栓皮栎纯林和混交林食叶害虫发生的主要立地因子。【结果】(1)栓皮栎纯林和栓皮栎-侧柏混交林食叶害虫危害均随海拔、枯落物厚度和枯落物覆盖度的增加而显著增加,其叶片损失率均在海拔700~750 m处最高;枯落物厚度在4~6 cm时比0~2 cm分别显著增加了25.82%和57.98%;与枯落物盖度0~25%相比,在75%~100%时分别显著增加了52.28%和53.81%。(2)栓皮栎-侧柏混交林食叶害虫危害均高于栓皮栎纯林,其中混交林在海拔600~650 m和650~700 m、阴坡和阳坡及枯落物覆盖度75%~100%的叶片损失率均显著高于纯林。(3)多元逐步回归分析结果表明,海拔和枯落物覆盖度与栓皮栎纯林和栓皮栎-侧柏混交林食叶害虫危害程度密切相关,且海拔起主要作用,贡献率分别为24.8%和36.3%。【结论】海拔、坡向、枯落物厚度和枯落物覆盖度显著影响了栓皮栎食叶害虫危害程度,且混交林食叶害虫危害高于纯林,其中海拔是影响栓皮栎纯林和混交林食叶害虫危害的主要因素。
【Objective】To clarify the change characteristics of leaf-eating pest damage in Quercus variabilis pure forest and Quercus variabilis-Platycladus orientalis mixed forest plantations under different site conditions,so as to provide basic data and theoretical support for the optimization of Q.variabilis forest structure,ecological management of leaf-eating pest and its sustainable management in China.【Method】In this study,Q.variabilis was selected as the target tree species,and the different of demage degree and distribution of leaf-eating pests in different site conditions(altitude,slope,slope direction,thickness of litter and coverage of litter)were compared and analyzed,to explore the main site factors affecting the occurrence of leaf-eating pests in pure forest and mixed forests of Q.varabilis were explored.【Results】(1)The damage of leaf eating pests in Q.variabilis pure forest and Q.variabilis-P.orientalis mixed forest plantations all increased significantly with the increase of altitude,litter thickness and litter coverage,and the leaf loss rate was the highest at 700-750 m altitude;The litter thickness at 4-6 cm significantly at 75%-100%increased by 25.82%and 57.98%compared with that at 0-2 cm;Compared with the litter coverage of 0-25%,the litter coverage increased by 52.28%and 53.81%respectively.(2)The damage of leaf eating pests in the Q.variabilis-P.orientalis mixed plantations forest was higher than that in Q.variabilis pure forest.The leaf loss rate of the mixed forest was significantly higher than that of the pure forest at the altitude of 600-650 m and 650-700 m,the shady slope and the sunny slope,and the litter coverage of 75%-100%.(3)Multiple stepwise regression analysis showed that altitude and litter coverage wereclosely related to the damage of leaf eating pests in Quercus variabilis pure forest and Q.variabilis-P.orientalis mixed forest plantations.Altitude played a major role in affecting the damage degree of leaf eating pests in Q.variabilis pure forest and mixed forests,accounting for 24.8%and 36.3%variations,respectively.【Conclusion】Altitude,slope direction,thickness of litter and coverage of litter significantly affected the damage degree of Q.variabilis leaf-eating pest,and the damage of leaf eating pests in mixed forest was higher than that in pure forest.Altitude was the main factor affecting the damage of leaf eating pests in pure and mixed forest of Q.variabilis.
作者
郭韶鑫
程珂
冯志培
于东立
陈锐
杨喜田
GUO Shaoxin;CHENG Ke;FENG Zhipei;YU Dongli;CHEN Rui;YANG Xitian(College of Forestry,Henan Agricultural University,Zhengzhou 450046,China;Yellow River Engineering Consulting Co.,Ltd,Zhengzhou 450000 China)
出处
《河南农业大学学报》
CAS
CSCD
2023年第1期73-80,共8页
Journal of Henan Agricultural University
基金
国家重点研发计划项目(2018YFD0600204-04)。
关键词
栓皮栎
立地条件
食叶害虫
叶片损失率
Quercus variabilis
site factors
leaf-eating pests
rate of leaf loss
作者简介
郭韶鑫(1996-),男,河南新野人,硕士研究生,主要从事植被恢复方面的研究;通信作者:杨喜田(1965-),男,河南长垣人,教授,博士生导师。
