摘要
本文根据北京试验点侧柏种源试验1-6年观测数据,研究了种源间在越冬受害程度和高生长两个主要性状上的变异及其规律;分析了种源高生长与年份的交互作用;探讨了越冬受害程度地理变异的气候生态基础.结果表明,种源间在越冬受害程度和高生长上存在明显的差异,越冬受害程度的地理变异模式是以纬向变异为主的渐变类型;种源树高与采种点纬度的相关系数随树龄而变化:1-3年生时为负相关,5-6年生时为正相关.本文初步提出供北京侧柏造林选用的优良种源.
Based on observed data from provenance trails of Platycladus orientalis at the age of 1-6 years in Beijing, this paper studied the variation and the pattern in frost damage and growth of plants from different provenances. The interactions between provenances and ages were analysed. The climatic ecological factors leading to geographical variation in frost damage were discussed. The results showed that significant differences existed in frost damage and height of plants from different provenances. Geographical variation in frost damage belonged to latitudinal cline. The correlation-coefficient between height of plants and latitades of seed origin changed due to ages: it was negatire at the age of 1-3 years and it was positive at the age of 5-6 years. This paper made preliminary suggestion of fine provenances of Platycladus orientalis used in Beijing.
出处
《北京农学院学报》
1990年第1期19-27,共9页
Journal of Beijing University of Agriculture
关键词
侧柏
种源
越冬
生长
地理变异
Platycladus orientalis
provenance
overwintering
growth
geographical variation
