毛泡桐地理种源造林对比试验报告

在苗期试验基础上，选用不同立地条件下开展了造林对比试验，４年研究结果表明，各种源树高生长与纬度呈弱负相关关系，在抗寒性与纬度呈显著正相关关系，但生长最好的仍属分布偏南的种源，部分种源内有生长优势明显的单株；这些单株大多有较典型的毛泡桐性状，部分具有杂种泡桐特征。

A Prelimanary report on silviculture Test With Different Provanances of Paulownia tomentosa

Based on the seedling test,various provanances were used for the silviculture test in different sites. The result of 4 years study showed that the main height of the trees with distinct origins had a weak negative correlation to the latitude but their cold resistance had a significant positive correlation to the latitude and the provanances growing best were still belonged to ones distributing in the sites to the south . In the different provanances,there were some single trees with obvious growth superiority and most of these trees had the character of typical paulownia tomentosa and some of them had that of its hybrid.