Study On Compiling Of The Volume Table Of Standing Timber Of Poplar Tree In The North Of Anhui

The poplar tree plantations in Huaibei area for the study, prepared in accordance with the stumpage table, 329 random samples of wood from trees poplar tree regeneration to information for the preparation of tables which 300 trees, 29 trees for inspection tables; The name drawn will log information from the poplar tree Huaibei, Bozhou, Suzhou, the city of Fuyang four different soil types, poplar tree farmers (69, 72, etc.) kind wooden information has broadly representative. To 300 trees kind wooden table information for the preparation of samples to choose six mathematical models for one yuan and the binary volume after the election model, using nonlinear equations Mai Kuate computation of the model parameters to determine the law, the remaining standard deviation, relevant index, according to the relevant index largest and the smallest surplus standard deviation principles select the best one yuan volume models for binary volume V=0.0001413d2.4463; V=0.00009693d2.0123h0.6147; further models for binary volume of one yuan and the residual model estimation volume analysis indicates that the two models are in the volume estimated residual (-2.5σ, 2.5σ) residual confidence interval,on the model of a good fit. To 29 trees kind wooden table information for inspection samples were calculated above one yuan and binary volume model theory volume and the actual volume of the average relative error, the average absolutely relative error and systematic errors, calculations are:1 yuan volume table are -0.75, 14.55, 1.62; binary volume table were 2.69, 8.62, 0.08, error analysis showed binary volume error estimates are smaller than 1 yuan volume table on binary volume table estimates precision than 1 yuan volume table, but both volume table estimated systematic errors are less than 5% to meet forestry production volume estimates of accuracy in production applications.