CAJ | 학술논문

基于吉林省汪清林业局金沟岭林场95株冷杉天然林解析木（Abiesnephrolepis）的胸径、树高及从地面起至树梢的11个高度处的直径数据，利用三次平滑样条函数结合线性预测理论得出冷杉的干曲线。最后分析模型的算术误差和相对误差的均值、标准差和均方误差。分析结果表明：预测得出的干曲线能够很好地反映冷杉干形的生长变化，预测材积与实际材积非常接近。
기우길림성왕청임업국금구령림장95주랭삼천연림해석목（Abiesnephrolepis）적흉경、수고급종지면기지수소적11개고도처적직경수거，이용삼차평활양조함수결합선성예측이론득출랭삼적간곡선。최후분석모형적산술오차화상대오차적균치、표준차화균방오차。분석결과표명：예측득출적간곡선능구흔호지반영랭삼간형적생장변화，예측재적여실제재적비상접근。
Stem curve for natural fir forest in Jingou forestry farm at Wangqing Forestry Bureau in Jilin province was fitted based on the data of diameters at breast height, merchantable heights, and diameters at different heights from 95 sample trees. The smoothing spline and the linear prediction theory were used to get the stem curve and calculate the stem volume. Finally, the mean error, standard error, and root mean square error for arithmetic error and relative error of the model were analyzed. The analysis results demonstrated that the predicted stem curve can precisely reflect the variation of the fir stem curve, and the predicted volume is fairly close to the calcu- lated stem volume.