巨桉、柳桉种源试验及其生长比较

从巨按13个种源、柳按14个种源的试验林为研究材料，对生长在海拔100m、贫瘠山地上的5年生幼林进行分析，并对树种间和种源问的生长差异进行比较。结果表明：（1）在树种水平上，柳按的生长适应性，生长速率及通直度、径高比等方面均比巨按好，只是在枝下高度上不及巨桉，但树种间的差异，除抗寒性特别明显外，其余均不显著。（2）树种内的不同地理种源之间，树高、胸径和材积生长差异，巨按和柳按在幼林3年生时均达显著或板显著差异（柳桂树高除外），但在此前的第1、第2年和此后的第4、第5年差异均不显著，表明区按和柳按种源间幼林期的生长表现呈现不规律性。（3）运用综合评定法进行多性状综合评定、评选出巨按0017、1489和15120，柳按13015、14508和0116共6个为速生优质种源，令后可在我国中亚热带东部沿海地区推广种植，这些优良种源均来自昆士兰北部和新南威尔士州的沿海地区。

Provenance Experiment and Growth Comparison on Eucalyptus grandis and Fu.saligna

Analysis on 5 - year young forest with 13 Eucalyptus grandis provenances and 14 Eu.saligna provenances at 100m elevation and on impoverished mountainous area, and comparisons on growth difference between species and among provenances resulted that the adaptability,growth coefficient, straightness, diameter and height ratio, etc. of Eu. grandis was better than Eu. saligna's. The difference between species was not evident except cold tolerance. Growth of young eucalypt among provenance had no regulation. Some quick - growth fine provenance were evaluated by comprehensive evaluation. These provenance were from coast area of Australia.