细叶桉家系早期试验研究

Preliminary Study on a Progeny Trial of Eucalyptus tereticornis

通过对１４个种源１００个家系的细叶桉家系试验的结果表明：主要性状在家系和种源间均存在极显著的差异，昆士兰州的１３６５９，１６５５８，１５８２６，１３５４４号种源的家系最好，其次是巴布亚新几内亚的１３３９８种源的家系，最差的是新南威尔士１３３０８和１３３１９种源的家系。材积生长最大的家系是５１号（１ｋｍＮｏｒｔｈｏｆＬａｕｒａＱＬＤ）和６０号（ＭｔＭｏｌｌｏｙＱＬＤ），分别为２８．６４５、２７．６０７ｍ３／ｈｍ２，是最差家系３３号（ＳｉｒｉｎｕｍｕＳｏｇｅｒｉＰＮＧ６．１６６ｍ３／ｈｍ２）的４．６倍和４．５倍，其干形通直圆满，分枝匀称且较细。树高、胸径、单株材积、干形、分枝和保存率与经度、纬度呈极显著或显著负相关。初步选出了适合粤西地区生长的２５个优良家系。

The results of a progeny trial of E. tereticornis involved 14 provenances and100 open-pollinated families at age 32 months in western Guangdong Province showed thatthe growth differences among 14 provenances were highly significant while the growth differ-ences among families were also highly significant.The most of better families were fromQLD provenances 13659,16558,15826, 13544,and from PNG provenance 13398.The poorfamilies were from NSW provenances 13308 and 13319.The volume of the best family Fam-51 from 1 km North of Laura QLD was 4.6 times larger than that of the poorest family Fam-33 from Sirinumu Sogeri PNG. The height growth,DBH,volume,stem form and currentsurvival of E. tereticornis were highly significant and negatively correlated with the latitudeand longitude of its native habitat.The paper identifies 25 promising families suitable forplanting in the west of Guangdong Province.