尾叶桉种源─家系生长与抗风性选择

对尾叶桉11个种源174个家系2 3年生试验林的生长与抗风性进行了测定,结果表明:尾叶桉种源间、家系间、区组间的差异以及种源与区组、家系与区组的交互作用均极显著。台风对尾叶桉的危害主要表现在造成风折,占整个试验林木的22 5%。尾叶桉种源 家系的生长性状与其抗风性能呈显著的负相关;通过对174个家系的生长和抗风性的综合指数选择,初步选出了32个适合粤西生长的既抗风、生长又快的家系。

Selection on Growth and Wind-resistance Traits for Provenances and Families of Eucalyptus urophylla

The results of growth and wind-resistance measure for a trial with 11 provenances and 174 families of Eucalyptus urophylla at 2.3 year-old plantation showed that traits on growth and wind-resistance among provenances, among families, among blocks and interactions between provenance and block, between family and block had highly significant differences. The main damage by typhoon to E.urophylla plantation was stem break-of accounting for 22.5% of trees in the whole trial. Wind-resistance of provenances and families had significant negative correlation with the growth character. The thirty-two families of E.urophylla with wind-resistance and fast growth and suitable for the growth in west Guangdong were selected by the Index Selection Method.