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对广东湛江 15年生和广西东门林场 7年生的杂交松试验林的生长和材性进行研究 ,结果表明 :广东湛江 15年生最优良杂交松组合 (正种加勒比松河 6×湿地松混合花粉 )的材积较对照正种加勒比松材积大 1.66倍 ;广西东门林场 7年生杂交松 (湿地松×洪都拉斯加勒比松 ) 3个家系的平均材积较湿地松 60个家系的大 2倍 ,最优良杂交松 (家系 62号 )的材积较湿地松大 2 .88倍。以上优良杂交松可分别在我国热带及南亚热带推广。杂交松的年轮平均密度和晚材率大致处于正种加勒比松和湿地松之间 ,年轮平均密度的差异主要是由于晚材率差异所致。 3种松木的变异模式都是从髓心起逐渐增高 ,到第 8～ 9年变化趋缓 ;杂交松在近树皮处的纤维长度介于两个亲本之间 ,近髓心处的纤维长度略大于两个亲本的纤维长度
The results showed that the 15-year hybrids of Pinus massoniana in Zhanjiang, Guangdong Province (mixed with 6 × slash pine mixed pollen in the Caribbean) The average volume of 7-year-old hybrid pine (Pinus elliottii × Honduras caribbean pine) in Dongmen forest farm in Guangxi was twice as large as that in 60 families of Pinus elliottii. The best hybrid hybrid pine (Family 62) is 2.88 times larger than Pinus tabulaeformis. The above excellent hybrid pine can be respectively promoted in China’s tropical and southern subtropics. The annual average density and latewood rate of Pinus decumbenat were approximately between the positive species of Pinus caribaea and Pinus elliottii. The difference of average annual ring density was mainly attributed to the difference of latewood rate. The variation patterns of three kinds of pine increased gradually from the center of pith, and changed slowly from the 8th to the 9th year. The length of the hybrid pine near the bark was between the two parents, and the fiber length Slightly larger than the fiber length of both parents