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用陕西省主要林区收集的油松标准地、标准木分析了带、去皮正形数系列f<sub>0.nh</sub>（0.n=0.0,0.02,0.04,0.06,0.08,0.1,0.15,0.2,0.25,0.3,0.4,0.5）之间的变化规律n对林分得到:当0.n=0.15时,f<sub>0.nh</sub>（带皮）≈f<sub>0.n</sub>（去皮）;当0.n【0.15时,f<sub>0.nh</sub>（带皮）【f&