Study on the Germination of Paulownia Tomentosa Seeds in Different Provenances and Its Cluster

This paper dealt with the studying the germination percentage. germination potential and analyzing thegermination of the seeds wtith different treatments by systematic statistics method Seeds were collected from 14 prove-nances in September 1994. The results indicated that the germination percentage and germinalion potential of the seeds invarious provenances were different. Both indexes in Nanchang area was much lower than those in the rest provcnances.The germination percentage and germination potenlial of the seeds in different provenance deelined after the seeds weretreated with aging for one year. The light treatment might promotes the germination percentage more effectively than thegermination potential. In addition. fuzzy cluster may refleet the relationship among germination in different protenances.

不同种源毛泡桐种子发芽状况及其聚类分析

本文分析了不同毛泡桐种子的发芽状况并对其进行了聚类分析．结果表明，光照处理有利于提高毛泡桐种子的发芽率和发芽势，室温贮藏不利于种子活力的保持，根据不同条件下毛泡桐种子发芽率和发芽势的差别，利用聚类方法将其划分为四组，该结果为泡桐引种培育新品种奠定了基础．

低温湿层处理对毛泡桐种子发芽率的影响

研究了低温湿层处理对毛泡桐种子的发芽可能温度范围及光感应度的影响结果表明：未进行低温湿层处理的种子在２０ ℃，２５ ℃条件下几乎都能发芽，在１５ ℃和３０ ℃的温度条件下发芽率在４０ ％ 左右低温湿层处理２０ ～６０ ｄ ，发芽率几乎达到１００ ％ 说明低温湿层处理能扩大毛泡桐种子发芽可能温度范围低温湿层处理虽不能改变毛泡桐种子的光发芽特性。

不同地区毛泡桐种子发芽状况的初步研究

本文分析了不同地区毛泡桐种子的发芽状况并对其进行了系统聚类分析。结果表明，光照处理有利于提高毛泡桐种子的发芽率和发芽势，室温贮藏不利于种子活力的长期保持。根据不同条件下毛泡桐种子发芽率和发芽势的差别，利用系统聚类方法将其划分为四组。