摘要
2006—2008年,对山西省同朔地区金沙滩林场4种不同林分内青杨天牛自然种群进行了调查,分析结果表明,青杨天牛种群死亡率的最大变化都发生在一期幼虫期,说明该虫期是关键时期或关键虫期;另外,成虫期的发生数量决定下一代的产卵数量。杨树纯林,杨树—油松混交林,影响青杨天牛种群数量变动的关键因子是菌寄生;而杨树—油松—沙棘混交林和杨树—油松—沙棘—柠条混交林,影响青杨天牛种群数量变动的关键因子是啄木鸟啄食。
The life tables were made from the investigation on natural population of saperda papulnea L in four different stand types of Jinshatan forestry centres seated in Tongshuo of Shanxi Province, and then the lethal and key factors were analyzed. The conclusions were as follows： life table conclusion： the variety on mortality rate ofsaperda papulnea L first instar larvae was the highest. So, it suggested that this stage was key stage or key larve stage. And we also found the laying of offspring was determined by the number of imago stage in pure poplar, the key factor of effect on population number change of saperda papulnea L was par- asitieal bacterium; the key factor was parasitical bacterium in Populus - Pinus tabulaeformis Carr. mixed forest; Woodpecker eating was the key factor which affect population of Saperda papulnea L in Populus - Pinus tabulaeformis Carr. - Hippophae rhamnoides Mixed forest and Populus - Pinus tabulaeformis Carr. - Hippophae rhamnoides - Caragana Korshinskii Kom. mixed forest.
出处
《山西农业科学》
2010年第1期88-90,共3页
Journal of Shanxi Agricultural Sciences
关键词
群落结构
青杨天牛
生命表
混交林
Community structure
Saperda papulnea L
Life table
Mixed forests
