| As one of the world's three major plantation species, eucalyptus has had tremendous development at home and abroad, it is found planted in vast number of suitable areas in our country, and with very high intensification. The assets management of eucalyptus plantation is inevitable because of its short rotation, however, current researches on forest resources assets evaluation mainly stop at general timber forests, therefore, researches especially on eucalyptus plantation are of great significance. This paper discusses problems and solutions in eucalyptus asset evaluation.This research gives you acquaintance with the growth of eucalyptus plantation's DBH and volume and full understanding of its features by analyzing the data of eucalyptus plantation standard plots, it also provided a foundation for following researches. Analyzing eucalyptus plantation's economic mature age, age when the clean current value reaches the top, technical mature age and market mature age, to construct judgment matrix through analyzing relationship of all kinds of factors that have influences on forest's final cutting age, then we can get the weights that weighed by those factors in its final cutting age, a model of stands'final cutting age can be structured. The model of stands' final cutting age for Eucalyptus. Grandis×E.urophylla isy=0.48x1+0.28x2+0.05x3+0.20x4, according to this model, the final cutting age of Eucalyptus. Grandis×E.urophylla plantation is around 5.7 years.As the speed of nature eucalyptus plantations, the annual diameter at breast height, stock levels were significant differences in some areas according to two-year age class selection method and the corresponding large error in calculation of indicators, such as shorter time intervals by quarter, although in theory more scientific However, to obtain relevant data such as standard stock, tree height, price and other factors is very difficult, therefore, this study determined the eucalyptus plantations of the same year using the same methods and economic and technical indicators.In the study,241 surveys by the standard analysis, the final fitting sparse Eucalyptus plantation density is 1.0 standard stand basal area model: G1.0=2.147541-0.172068H+0.078313H2; shaped high model:HF=0.2806H+2.625. According to Ms=Gs (HF) preparation of standard tables Eucalyptus plantations, through this form can be found simple standard Eucalyptus plantation stock, which is the present value of harvest method calculate the K value provides a reference.In determining the rate of investment income, the analysis of a variety of investment yield calculation formula, and then joining the actual situation of eucalyptus plantations, reached a more practical formula:rate of return on investment equal to rate of free risk return on investment plus risk minus adjusted coefficient multiply industry average rate of risk return on investment.This study involved assessment of parameter sensitivity analysis found that using replacement cost method in the assessment, the greatest impact on the results of the assessment is the survival rate, the sensitivity coefficient of 2.4, respectively; in the present value of the harvest when evaluating the greatest impact on the assessment results are price, volume, and its sensitivity coefficients, respectively,1.16,1.03; in the algorithm used to evaluate the market price down, the greatest impact on the results of the assessment is the price of the sensitivity coefficient 1.78. |
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