北京地区侧柏、油松带皮胸径与去皮胸径的关系

Outside and inside bark diameter at breast height for Platycladus orientalis and Pinus tabulaeformis in the Beijing area

采用线性模型对北京地区57株侧柏Platycladus orientalis解析木和60株油松Pinus tabulaeformis解析木的带皮胸径(DOB)与去皮胸径(DIB)的关系进行了拟合,得到侧柏和油松的带皮胸径与去皮胸径的数学模型分别为DIB侧柏=0.918DOB侧柏,DIB油松=0.916DOB油松,从而间接得到侧柏和油松的树皮厚度方程分别为B侧柏=0.082DOB侧柏,B油松=0.084DOB油松,树皮调整因子分别为K侧柏=1.089,K油松=1.092。这些模型的建立和因子的取得可优化北京地区侧柏、油松树木直径生长模型。

Linear models were used to determine the relationships between outside and inside bark diameter at breast height of 57 Platycladus orientalis and 60 Pinus tabulaeformis trees in the Beijing area. Results showed that mathematical models of outside bark （DOB） and inside bark （DIB） diameters at breast height in Platycladus orientalis （PO） and Pinus tabulaeformis （PT） were DIBPO = 0.918 DOBPO and DIBPT = 0.916 DOBPT. Two equations of bark thickness, such as BPO = 0.082 DOBPO and BPT = 0.084 DOBPT, as well as two adjusted bark coefficients, KPO = 1.089 and KPT = 1.092, were obtained indirectly from the above two bark thickness models. These data also indicated that the models formed and the coefficients obtained were stable for diameter growth model optimization of both trees in the Beijing area. [Ch, 1 fig. 1 tab. 6 ref.]