摘要
以湖北省宜昌市大老岭林场日本落叶松(Larix kaempferi(LAMB.)Carr)种源试验林为研究对象,利用林龄树高数据,应用哑变量方法把种源效应引入Richards方程和Schumacher方程的对数线性回归形式,研究了7个日本落叶松种源对树高生长模型参数的影响。结果表明:Schumacher模型的检验结果,种源对树高生长模型斜率参数或截距参数有显著影响,并且更倾向于种源效应对截距参数的影响;Richards模型的检验结果,种源对树高生长模型的参数有显著影响,但更倾向于种源效应对渐进参数的影响,对速率参数和形状参数也有影响。同一立地不同日本落叶松种源对树高-林龄曲线的渐进参数、截距参数有显著影响,对速率参数、斜率参数、形状参数有影响,应采用不同的生长模型来描述树高生长过程。
Larix kaempferi in provenance test forest in Dalaoling Forest Farm of Yichang County were chosen as experimental ma- terials. Dummy variable model was used to test difference in parameters of height growth of seven L. kaempferi provenances during stand age 3-10 and 24. Flexible Richards equation and logarithmic linear Schumacher were chosen as basic model. From Suchmacher model, there was more significant difference in asymptote parameter than slope parameter for seven L. kaempferi provenances. From Richards model, there was more significant difference in asymptote parameter than growth- rate parameter and shape parameter. With difference between parameters of L. kaempferi provenances, we should chose dif- ferent equations to describe height-age models.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2016年第9期1-4,共4页
Journal of Northeast Forestry University
基金
"十二五"国家科技支撑计划课题(2012BAD01B01)
关键词
日本落叶松
种源
树高生长模型
哑变量模型
Larix kaempferi
Provenances
Height-age models
Dummy variable model
