黄山松种子园球果产量与郁闭度的研究

Relation of Cone Yield with Canopy Density of Pinus taiwanensis Seed Orchard

对郁闭度为0.8的黄山松种子园进行疏伐试验,使不同试验区域的郁闭度分别达到0.2、0.3、0.4、0.5、0.6、0.7、0.8共7种郁闭度,分析黄山松种子园球果产量与郁闭度间的关系,结果表明:通过疏伐合理调整黄山松种子园郁闭度,能够明显提高球果产量,当郁闭度保留在0.5时,球果的产量最高,是对照林分的1.82倍,是0.6郁闭度林分的1.18倍,是0.4郁闭度林分的2.10倍;不同年份球果产量间也存在显著差异。

Experiments were conducted on thinning in Pinus taiwanensis seed orchard with canopy density of 0.8 in Tiantai, Zhejiang province. 7 treatments had canopy density of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7 and 0.8. The result demonstrated that thinning could augment cone yield in treated orchard. The highest cone yield gained at treated plot with 0.5 of canopy density, that was 1.82 time of the control, 1.18 time of that at 0.6 of canopy density and 2.10 time of that at 0.4.