Study on Timber Volume Table for Pinus sylvestris var.mongolica Plantation in Mu us Sandy Land,Inner Mongolia
Standing tree volume is not only an important characteristics of forest growth,but also a key index of for-est resource monitoring.Based on the measured data of 131 stocks of Pinus sylvestris var.mongolica in Mu Us Sandy Land,the standing tree volume model of Pinus sylvestris var.mongolica was established through choosing various equations with diameter at breast height and height as independent variables,and the standing tree volume tabled was drawn.The results show that both the one-variable and two-variable volume models are the best in the form of power function(V=0.000 17D2.220 and V=0.000 093D1.693H1.001),R2 is 0.98 and 0.99,respectively.Both two models have achieved good prediction results,and the relative error is between-16%and 18%,especially for the two-variable model,the absolute value of relative error is within 10%.The tree volume model and tree volume table of Pinus sylvestris var.mongolica constructed in this study can be widely applied to estimate the plantation volume in Mu Us Sandy Land of Inner Mongolia.
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