《Table 2 Age groups of P.tomentosa forest》

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《Discussion on Individual Expected Maturity Age of Populus tomentosa Carr》

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Different from previous studies，3 different maturity ages were obtained，namely 11 years，26 years and 41 years.Baased on the production practice，the 3 maturity ages were named as the maturity age for pulpwood（or short rotation），maturity age for pillar wood（beam）and maturity age for peeler.The maturity age obtained from the fitting equation of DBH 1 was very close to the fitting value of wood volume 1，which was consistent with the results obtained from the previous traditional method.The maturity age obtained from the square of DBH 2 was very close to the fitting value obtained from the wood volume 2，which proved the preciseness of the research method.The test results were very close to the actual values.The division of the age groups was shown in Table 2.