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1997年在白皮松天然分布区采集了 8个种源 ,在北京采集了1个次生种源作为对照。 1年生时抽样测量了 9个种源的鲜重、干重、侧根数、主根长等性状指标 ,2年生时调查了苗高和地径。方差分析结果表明 ,种源各性状间存在极显著或显著差异。在多重比较、综合排序的基础上 ,进行了苗期选择 ,其中两当和蓝田为中选优良种源 ,6个性状平均超过当地种源(CK1) 12 .4 % ,超过种源总均值(CK2 ) 2 0 .3%。
In 1997, eight provenances were collected from Pinus bungeana distribution and one secondary source was collected from Beijing as a control. The fresh weight, dry weight, lateral root number and main root length of nine provenances were measured by sampling at 1 year old. The seedling height and diameter were investigated at 2 years old. Analysis of variance showed that there were significant or significant differences among the provenances. On the basis of multiple comparisons and comprehensive sequencing, seed selection was carried out. Among them, Liangdang and Lantian were the best provenances and the average of six traits exceeded the native provenance (CK1) by 12.4% ) 20.3%.