25年生马尾松种源遗传变异及选择研究

Genetic Variations and Selection of Pinus massoniana Provenance in a 25-Year-old Testing Plantation

对福建省大田桃源林场引种的25年生的马尾松种源试验林进行了调查分析,结果表明:各种源间生长分化明显。8年、10年生的种源排名结果与25年后有很大变化;秩次相关不显著;两广种源在中幼期生长较快,而闽西种源在后期生长良好,25年生时已经赶超两广种源。根据主成分分析和聚类分析,将参试种源分成优、良、中、差4大类,生长最好的福建武平种源25年生时,平均胸径为29.25cm(年均1.17cm),平均树高为19.44m,平均材积0.5631m3,为别是对照(福建大田)的1.56、1.08和2.41倍,是最差种源湖南慈利的2.22、1.60和6.72倍。列在第一名的福建武平种源材积是第二名的广东信宜种源的1.14倍,增产的效果明显。

This paper analyses the data of the growth characters of Pinus massoniana Lamb. in a 25 - year - old provenance testing plantation at the Taoyuan Forestry Farm, Datian County of Fujian Province. The results show that there are significant differences among the provenances, but the juvenile-mature rank correlation of provenance was not remarkable. The result of the best provenances made by 25 years ago is different with the result made by 8 years ago and 10 years ago in the same .testing plantation, The Guangdong-Guangxi provenances is good during the young age and the middle-aged .The west Fujian province provenances rapid growing at late stage and the yield exceeds the yield of the Guangdong-Guangxi provenances By using principal component analysis and the cluster analysis methods 89 provenance of Pinus massoniana Lamb, were divided into 4 groups, such as better provenances, good provenances, common provenances and worst provenances, the best provenances is the Fujian Wuping provenances which the average breast diameter is 29,25cm （It grows 1,17cm every year） ,the average height is 19,44m and the average timber volume is 0,5631 m3,The growth of tree height, breast diameter and the timber volume were 1.56, 1.08 and 2,41 times more than control provenances （Datian provenances） and were 2.22,1,60 632 times more than worst provenances that is Hunan Zili provenances, The timber volume of the best provenances that is the is 1.14 times more than the second provenances that is Guangdong Xinyi provenances .The yield of timber increased evidently.