杉木人工林可变密度的全林分模型及其应用研究

以林分年龄、地位指数SI、林分密度指数SDI为输入变量 ,从模型间的相容性出发 ,建立了杉木人工林可变密度的全林分模型。着重探讨了用Richards方程构造林分断面积生长模型时 ,有关参数与SI和SDI的关系 ,分析了SDI的变化规律 ,采用名义年龄法建立了SDI的动态预估模型 ,最后 ,给出了应用可变密度的全林分模型模拟林分自然生长过程的实例

Studies on the Variable-Density Whole Stand Model of Cunninghamia lanceolata Plantations and Its Application

The variable-density whole stand model of Cunninghamia lanceolata plantations was set up, the relationships between relevant parameters and site indexes(SI)and between relevant parameters and stand density indexes(SDI)were emphatically approached when the Richards equation was used to form the stand basal area growth model, the SDI change law was analysed and the SDI dynamic predictive model was set up by adopting the nominal age method.In the end,the living example of applying the variable-density whole stand model to simulate the stand natural growth process was given.