核桃楸不同种源苗期生长的研究

The research of different provenance seedling growth of Juglans mandshurica

以长白山区具有代表性14个核桃楸种源为研究对象,分析不同播种方法对出苗率和保苗率影响,并进行不同种源苗期生长量观测。结果表明:种子沙藏春播和青果秋播对出苗率和保苗率影响不显著(P>0.05),沙藏春播出苗率较高的是4#、5#、14#种源,而青果秋播出苗率较高的是7#、8#种源,其保苗率变化趋势与出苗率一致。经聚类分析,14个种源1、2 a生苗木生长可分为三类,其中第Ⅲ类4#、14#、13#、5#、8#种源苗木高生长和地径生长表现优良。

The effect of different sowing methods on germination rate and survival rate were investigated and seedling growth of different provenances was observed by taking the 14 representative provenances of Juglans mandshurica in Changbai mountain as the research object. The results showed that there were no significant difference between emergence rate and preservation rate among spring sowing of sand - storage and autumn sowing of green fruit stage （P 〉 0. 05 ）. The highest seedling emergence rate by spring sowing of sand -storage and by autumn sowing of green fruit stage were4#, 5#, 14# and 7#, 8#, respectively. The preservation rate of the corresponding porvenance was consistent with the emergence rate. The cluster analysis showed that the fourteen provenances can be devided into three class according to 1 - year - old and 2 - year -old seedlings growth. And seedling in high growth and diameter growth of 4#, 14#, 13# ,5#,8# showed better in class III.