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华山松种源试验表明,不同种源场圃发芽率、苗高、保存率存在极显著差异,这些苗期性状差异与地理纬度呈负相关。5、6、19号种源表现优异,场圃发芽率、苗高和保存率均高于种源平均值。各种源7月份进入速生期,7、8月份苗高生长量占全年的26%左右,10月开始陆续封顶。
The provenance experiment of Pinus armandii showed that there were extremely significant differences in the germination rate, seedling height and preservation rate of different provenances. The difference of these seedling traits was negatively correlated with the geographical latitude. The provenances of No. 5,6 and No. 19 were excellent, and the germination rate, seedling height and preservation rate of field nursery were higher than the average of provenances. Various sources entered the fast-growing period in July. The growth of seedlings in July and August accounted for about 26% of the annual total, starting in succession in October.