神农箭竹更新苗生物量龄级分配模型

神农箭竹(Fargesia murielae (Gamble) Yi)原产于我国神农架地区,1996-2000年,神农箭竹相继开花死亡,现有更新苗由种子繁殖而成,现正处于南实生苗向克隆种群过渡阶段,研究这一过程中生物量在不同龄级克隆体之间的分配,对于提示从生竹类的觅养过程中的生态关系十分重要.研究结果显示神农箭竹更新苗地上部生物量在各龄级中的分配符合指数函数回归方程Y=5.7319 e0.2054x(R2 =0.9833),且各无性系构件因子之间均存在显著相关关系,其中各器官生物量与胸径的拟合模型均达到显著水平；地上部分干重与胸径的最优拟合模型为一元幂函数模型,方程式为W=2.029×D1.674；秆重与胸径的最优拟合模型为指数模型,方程式为W=0.133×e1.202D.

Biomass age grade distribution model of Fargesia murielae ( Gamble) Yi renewed seedlings

Fargesia murielae (Gamble) Yi originated in Shennongjia Area of China,and shennong arrow bamboos were flowering to death successively between 1996-2000.The existing renewed seedlings are from sexual reproduction,and now in a transitional phase from seedling plant to cloning population.Researching the clones′ biomass distribution in different age class is very important for revealing fasciculate bamboos′ ecological relationship in foraging progress.Research results showed that the renewed seedlings′ over-ground biomass distribution in each age fit the index function with regression equation Y=5.731 9 e0.205 4x(R2=0.983 3),and the clone components were significant correlation.What′s more,the biomass fitting models of various organs with DBH were also significant;the optimum fitting model of dry weight of the over-ground part with DBH was accorded with a power function,and equation was W=2.029×D1.674;in addition,the optimum fitting model of stem weight with DBH fit an index model,which equation was W=0.133×e1.202D.