木麻黄工业原料林多形地位指数模型的研究

Polymorphic Site Index Model of Casuarinae quisetifolia Fast-growing Plantation

以木麻黄工业原料林为研究对象,采用Richards非线性生长方程,通过参数置换法,建立了木麻黄多形地位指数模型。结果表明:(1)Richards方程的拟合精度较高,经检验,该模型优势高的理论值和实际值差异不显著,适应性较好,能对木麻黄的优势高生长进行正确预估;(2)研究地区木麻黄工业原料林的基准年龄可确定为3 a;(3)对多形地位指数模型的拐点进行分析,表明该模型能够客观地反映不同立地优势高的生长规律;(4)为推进国内木麻黄数表、模型的研究与应用提供了参考,为木麻黄林分立地质量评价,经营管理提供科技支撑。

The fast-growing plantation of Casuarinae quisetifolia were selected for establishing the polymorphic site index model by parameter replacement method based on the nonlinear Richards equation.The results shows that：（1）The Richards equation has much higher precision and a good adaptability,the difference of dominant height between theoretical value and actual value is not significant by testing,which indicates that the dominant height increment of Casuarinae quisetifolia can be properly evaluated;（2） The reference age of site index for fast-growing C.quisetifolia is 3 years in this area;（3） With the analysis of inflection point,it shows that the dominant height increments under different site conditions can be objectively reflected by the polymorphic site index model;（4） It provides a reference for the research and application on the mathematical tables and models of domestic C.quisetifolia.And it also provides scientific and technological bases for site quality evaluation and management.