加勒比松变种及种源选择的研究*

两次多点试验表明，加勒比松种内变种间非着极为显著的生长差异，变种与环境之间呈明显的交互作用，在雷州半岛，巴哈马变种和古巴变种生长快，抗逆性强，而洪都拉期变种易受松梢螟及叶枯病危害，表现出很大的不稳定性，在海南岛，巴哈马变种和洪都拉期变种生长较快，古巴变种的生长速度则明显降低。在变种内，巴马变种以巴哈马Abaco岛的天然种源和澳大利亚昆士兰Byfield的次生种源生长最好，我国湛江的次生种源和巴哈马Andros岛的天然种源生长最差。洪都拉斯变种除了LosLimones和SantaClara的种源外，其它均生和好。古巴变种内种源间未表现出明显的生长差异。

VARIETY AND PROVENANCE SELECTION OF CARIBAEA PINE IN SOUTHERN CHINA

Varieties and provenances of Pinus caribaea have been tested at 4 sites on Leizhou Peninsula, Guangdong Province and Hainan Island since 1983 and 1984 respectively. The 5-year-old and 4-year-old results show that there arc significant differences in growth rate among the three varieties and the interaction between variety and environment is also significant. On Leizhou Peninsula, P. caribaea var. bahamensis and P. caribaea var. caribaea are the suitable varieties which grow fast and have high resistance to disease and insects, while P. caribaea var. hondurensis not only is subject to the infection of tip moth and leaf wilt disease, but also has a low survival rate and unstable performance. However, on Hainan Island, the growth rate of P. caribaea var. bahamensis and P. caribaea var. hondurensis is much greater than that of P. caribaea var. caribaea.Within a variety, the best provenances of P. caribaea var. bahamensis are from Abaco Island and Byfield (Queensland, Australia), the worst provenances are from Andros Island and the land race of Zhanjiang, China. All provenances of P. caribaea var. hondurensis except those of Los Limones and Santa Clara grow relatively well both on Leizhou Peninsula and Hainan Island, There is no significant differences among the provenances of P. caribaea var. caribaea.