马尾松土贡种源纯林与混交林生长量和产脂力比较

Comparison on Growth Volume and Resin-producing Capacity of Tugong Provenance between Pure Forest and Mixed Forest of Pinus massoniana

对广西土贡马尾松(Pinus massoniana)种源人工成熟纯林和混交林于2007年和2008年进行连续2年采脂试验,结果表明:马尾松混交林胸径、树高、材积年均生长指标均高于马尾松纯林,且树高生长量差异显著;马尾松混交林松脂产量大于纯林,但差异不显著;马尾松混交林与纯林各年产脂力和矫正产脂力无显著差异;胸径和松脂产量关系最为紧密,其次为树高和树冠比,而与枝下高无显著相关性。

Resin tapping trial was conducted on artificial pure forest and mixed forest of Tugong prove- nance of Pinus rnassortiana with two consecutive years for 2007 and 2008. The results showed that： The average annual growth indicators including DBH, tree height and volume of mixed forest were higher than that of pure forest, and the difference in tree height was significant ; The resin output of mixed forests was higher than that of pure forest, but the difference was not significant; The resin producing capacity and the corrective resin producing capacity of mixed forest and pure forest were relatively close in the two years; DBH and resin output had the closest correlation, followed by tree height and crown, but under- branch height showed the opposite.