油松当年生小枝异速生长规律研究

通过标准化主轴估计分析了10余年生油松一级枝、二级枝、三级枝的当年生小枝的异速生长规律，包括当年生小枝的节间生物量-节间长度、节间生物量-针叶生物量、节间截面积-节间生物量、节间截面积-针叶生物量两两相关关系，进而剖析了油松当年生小枝的生物量分配方式、传输模式和形态结构关系，并通过独立样本进行检验。结果表明，异速生长关系的相关关系均非常显著，观测值和预估值之间的相关系数除了节间截面积和针叶生物量外均大于0.85，说明上述异速生长关系的相关关系非常显著；一级枝、二级枝、三级枝的SMA斜率没有明显差异，说明不同级别的枝的异速生长关系是相同的；小枝生物量和叶生物量的权度关系明显小于1；叶生物量和小枝截面积的权度关系接近于1，说明二者为等速生长。

Allometric Relationship of Current-year Shoots in Pinus tabulaeformis

Based on Standardized major axis estimation, the allometric rules between internode biomass and internode length, between internode biomass and needle biomass, between internode sectional area and internode biomass, and between internode sectional area and needle biomass of current-year shoots on first-order branches, second-order branches and third-order branches of 10 years old Pinus tabulaeformis trees were analyzed by power exponent equation, and the independent data were used to test the allometric models. The results show that the correlation coefficient between predicted and observed values is higher than 0.85 except the case between sectional area and needle biomass, and the correlation is statistically significant. The size scale between internode biomass and needle biomass is less than 1, which means that the biomass allocation rate is higher for internode biomass than for needle biomass. The size scale between sectional area and needle biomass is close to 1, which means that there is symmetrical relationship between these two attributes.