Below relative strain of 50%, the relative AE counts of Taiwan acacia, Lauan and Hemlock were below 20%, 20% and 30% respectively.But for China-fir, some of the specimens showed values over 30%.

• 3．相对应变50%25以下时，相思树、柳桉与铁杉之AE相对发生次数依次为20%25、20%25及30%25以下，但杉木之部分试材则在30%25以上。