CAJ | 학술논문

在森林经营中，间伐林分、未间伐林分分开单独建模存在不相容的问题，有必要对其进行研究，并建立统一的模型。利用森林资源一类清查数据，以Schumacher模型为基础，通过引入哑变量、间伐指标分别建立北京市油松林分断面积生长预估模型，使得间伐林分和未间伐林分能够整合在一起建立统一的模型。经检验，引入哑变量模型对油松林分断面积的预测精度最低，为87．99％；其次是引入间伐指标模型，预估精度为88．36％；综合引入哑变量和间伐指标模型预估精度最高，为88．61％。所建模型对间伐林分和未间伐林分均适用，更方便于在实践中应用。
재삼림경영중，간벌림분、미간벌림분분개단독건모존재불상용적문제，유필요대기진행연구，병건립통일적모형。이용삼림자원일류청사수거，이Schumacher모형위기출，통과인입아변량、간벌지표분별건립북경시유송림분단면적생장예고모형，사득간벌림분화미간벌림분능구정합재일기건립통일적모형。경검험，인입아변량모형대유송림분단면적적예측정도최저，위87．99％；기차시인입간벌지표모형，예고정도위88．36％；종합인입아변량화간벌지표모형예고정도최고，위88．61％。소건모형대간벌림분화미간벌림분균괄용，경방편우재실천중응용。
It was incompatible to model thinned stands and unthinned stands separately,so it was necessary to study and establish the unified models.Using forest inventory data,based on Schumacher model,through introdu-cing the dummy variables and thinning indexes to establish the stands basal area growth forecast models of Pinus tabulaeformis in Beijing respectively,and made the thinned stands and unthinned stands together to establish uni-fied models.After inspection,on the forecast effect for stands basal area of Pinus tabulaeformis,forecast accuracy of model with dummy variables was 87 .99%as a minimum;followed by the model with thinning indexes,forecast ac-curacy was 88.36%;forecast effect of model with dummy variables and thinning indexes was the best,forecast ac-curacy was as high as 88.61%.The models was applicable for thinned stands and unthinned stands,it was more convenient for application in practice.