祁连山中段3种草原蝗虫成虫的种内和种间竞争  

Intraspecific and interspecific competition among three grasshopper adults in the middle of Qilian Mountain

作　　者：陈威[1] 胡靖[1] 张廷伟[1] 王小强[1] 刘长仲[1] 

机构地区：[1]甘肃农业大学草业学院,草业生态系统教育部重点实验室,甘肃省草业工程实验室,甘肃兰州730070

出　　处：《甘肃农业大学学报》2013年第5期89-93,共5页Journal of Gansu Agricultural University

基　　金：公益性行业(农业)科研专项(201003079);肃南县草原蝗虫综合治理技术研究

摘　　要：通过人工罩笼控制试验对红翅皱膝蝗(Angaracris rhodopa)、亚洲小车蝗(Oedaleus decorus asiaticus)和小翅雏蝗(Chorthippus fallax)3种蝗虫成虫间的种内和种间竞争进行了研究.结果表明:红翅皱膝蝗喜食菊科植物,亚洲小车蝗和小翅雏蝗具有相似的食性,均喜食禾本科植物;红翅皱膝蝗种内竞争强于亚洲小车蝗和小翅雏蝗,种间红翅皱膝蝗与亚洲小车蝗或小翅雏蝗种间竞争较弱,亚洲小车蝗与小翅雏蝗竞争较强;高密度条件下,3种蝗虫的种内竞争均很强,随着密度降低,种内竞争随之减弱;3种蝗虫两两混养或3种混养时,红翅皱膝蝗死亡率均最高,亚洲小车蝗和小翅雏蝗的死亡率相对较低,反映出种间竞争的不对称性.The intraspecific and interspecific competition among the adults of three grasshoppers,Angaracris rhodopa ,Oedaleus decorus asiaticus and Chorthippus f allax were studied by field cage method. The results showed that A. rhodopa preferred to feverfew while O. decorus asiaticus and C. fallax to gramineous plants. A. rhodopa had stronger intraspecific competition than O. decorus asiaticus and C. fallax. The interspeeific competition between A. rhodopa and O. decorus asiaticus or C. fal＆x was weak while competition between （9. decorus asiaticus and C. fallax was strong. Intraspecific competition among three species was strong at high densities and decreased along with the densities down. In mixed feeding of two or three grasshopper populations,the mortality of A. rhodopa was higher than that of O. decorus asiaticus or C. fallax,which showed that interspecific competition was asymmetric.

关 键 词：蝗虫 成虫 种间竞争 种内竞争 祁连山 

分 类 号：S433.2[农业科学—农业昆虫与害虫防治]