摘要
以青海省东南部地区12个居群的山丹百合为研究对象,设样地调查其群落特征,分析其土壤理化性质,通过居群间生态因子的相关分析及聚类分析,对居群间生态多样性进行评价,探讨山丹百合资源的漂移线路。结果表明:山丹百合主要生长在以绣线菊、马莲、马仙蒿、金露梅和棘豆为优势种的阴坡灌丛中,在垂直结构上居于灌木层片。12个居群的山丹百合各土壤性状都表现出显著差异,具有较丰富的多样性。各土壤因子中以全氮含量与其它因子之间的相关性较显著,各地理因子中以年均温对土壤性状的影响最大,其次是坡向和年日照时长。通过研究发现青海省山丹百合存在3条主要的迁徙路线,表现出由低海拔向高海拔、低纬度向高纬度以及高经度向低经度迁徙的趋势。
An experiment was conducted to analyze the ecotypic diversities of 12 populations of L.pumilum DC.in southeast area of Qinghai province through investigating the vegetation characteristics,climate characteristics and geographical characteristics of the populations and soil characteristics.The results showed that most L.pumilum grew in shady shrubbery dominated by Spiraea salicifolia,Iris ensata,Lousewort,Dasiphora fruticosaand Oxytropis falcatae,and located at shrubbery synusia in vertical structure.Great diversities were showed between 12 populations.QN had a significant relation with other soil factors.Among all geographie factors,it was found that average temperature annual was the most important factor that affects the soil characteristics,followed by slope side and sunshine duration annual.There were three mainly migratory highway along altitude,longitude and latitude.
出处
《北方园艺》
CAS
北大核心
2011年第12期69-73,共5页
Northern Horticulture
基金
青海省科技局资助项目(2007-K-08)
关键词
山丹百合
生态多样性
伴生植物
土壤因子
L.pumilum DC.
ecotypic diversities
associated plants
soil factors
