【摘要】 根据凉水、帽儿山、草河口和龙江四个代表试点10年生种源试验的资料:树木生长、物候、材性、形态、种子品质、适应性和抗性等性状,采用主分量分析(PCA)的方法,参考了气候、地形、土壤和植被区划的结果,将长白落叶松天然分布区域划分成四个种源区,即白刀山种源区(编号Ⅰ)、小北湖种源区(编号Ⅱ)、白河种源区(编号Ⅲ)和桓仁种源区(编号Ⅳ)。更多还原

【Abstract】 Based on the 10—year measurement of data at the four typical trial sites-Liangshui, Maorshah, Caohekou and Longjiang, the natural distribution area of Larix olgensis was divided into four provenance districts by Principal Component Analysis method as Baidaoshan provenance region (No. Ⅰ) ; Xiaobeihu provenance region (NO. Ⅰ) ; Baihe provenance region (No. Ⅲ) ; Huanren provenance region (No.Ⅳ). The principal components are growth, phenology, character of timher, form ,quality of seed, adaptability and resistibility ,and combined with the division of climate, topography, soil and vegetation.更多还原