引种湿加松苗期生长表现分析

Seedling Growth Performance of Slash×Honduras Caribbean Pine Hybrid Progeny lntroduced from Australia

湿加松是湿地松(Pinuselliottii)和加勒比松(Pinuscaribeaea)的杂交种。从澳大利亚引进的湿加松(Pee×Pch=Pinuselliottiivar.elliottii×caribeaeavar.hondurensis)F2子代一年生实生苗表现出十分明显的生长优势,其平均苗高34 8cm,比湿地松和马尾松(Pinusmassoniana)大74%;平均地径0 48cm,比马尾松大52%;3种松树的根系生长表现无显著差异,但湿加松地下部分鲜重显著大于马尾松,地上部分鲜重极显著大于湿地松和马尾松。四川省引种湿加松宜在试验、示范的基础上逐步推广。

One year old seedlings of introduced Slash×Honduras Caribbean pine(Pinus elliottii var.elliottii×caribeaea var.hondurensis)F2 hybrid progeny were significantly superior in growth performance to both Slash pine(Pinus elliottii)and Masson pine(Pinus massoniana).Seedlings' height and grounddiameter of the hybrid progeny averaged 348 cm and 048 cm respectively,i.e.,the former were 74% higher than that of the Slash and Masson pines and the later 52% thicker than that of the Masson pine.Seedlings' fresh overground parts of the hybrid progeny weighed very significangly more heavy than that of the Slash and Masson pines and the fresh underground parts significantly more heavy than that of the Masson pine,whereas the hybrid progeny and the Slash and Masson pines showed no significant difference in their development of root systems.It is suggested that plantation trials and demonstrations of the hybrid progeny should be established and evaluated before it would be afforested on a large scale in Sichuan.