大叶相思优良家系的区域化选择

Regional Selection in Excellent Families of Acacia auriculiformis

在热带北缘(广东湛江)、南亚热带(广东江门)、亚热带(广西博白)进行不同气候立地条件下大叶相思(Acacia auriculiformis)优良家系的区域化试验,结果表明:参试家系在热带北缘具有较高的生长量,1.5年生其材积生长量分别比南亚热带、亚热带增加了5.30%和1.31%;各试验区材积生长大于对照家系20%的优良大叶家系共12个,其中热带北缘6个:BVG2711、BVG2702、BVG2706、BVG2717、BVG2724、BVG2725,南亚热带2个:2913、2910;亚热带4个:JSL1300、2925、MHL077、2928。

Regional experiments on excellent families of Acacia auriculiformis were conducted in Zhanjiang（representating the northern tropic）,Jiangmen of Guangdong（representating the southern subtropic）and Bobai of Guangxi（representating subtropic）.The results showed that the tested families in Zhanjiang had higher growth,and their volume increment was5.30％ and 1.31％ higher than that in Jiangmen and Bobai.The experiments demonstrated that there were twelve families among tested ones had 20％ much more volume increment than the control.