Study On The Finance Maturity Of Fokienia Hodginsii Planted Forestry

The forestry is an essential resource for human's living and producing and the main body is just the growing trees which is renewable resource with a long growth period.During the long growth process,the forestry's growth experiences the seeding time,young growth time,the mature period and senescence phase ,and the growth situation is always changing with the influences of nature enviroment, trees itselves and hunman's activities.And the best time of using the lumber is just in this process,which is named the forestry maturity.It can be defined into some types based on different angles.For example,it can be defined into quantity mature,craft mature and finance mature,etc based on the management goal.With the devolopment of market economy,the research on finance mature becomes more important and necessary for formulating forestry management plan.Along with the massive demands on timber resources, discovering and developing the fine timber wood resource has the vital significance. Relying on the fine cultivation characteristic and the material quality,Fokienia Hodginsii has become society's new favorite and the hot spot which the forestry workers study. This article just take the Fokienia Hodginsii planted forest as the object of research, computing its finance mature, which providing the scientific basis and the instruction for Fokienia Hodginsii planted forest management and development.This article calculates Fokienia Hodginsii planted forest finance mature with the methord of annual mean net-income based on continually manages and in the consideration of fund time value, refering to several commonly used economical mature appraisal target, and embarking from the forest annual mean currency harvest angle.First of all, chooses suitable growth model and estimates the plant growth quantity. This article establishes the polymorphic status index model through the immunity evolution algorithm. Taking the superior height and the status index estimation error being smallest as the objective function and the immunity evolution algorithm's ability in overcoming the existing evolution algorithm's restraining not maturely, enhancing the algorithm the search efficiency, makes a structure of polymorphic status index model in which superior height and the status index can be written into the explicit expression.And also makes a structure of density of stocking index dynamic estimate model. Through the status index model as well as the density of stocking index estimated the model may survey the plants status index and the density of stocking index, and then introducing status index and density of stocking index into growth theory equation(Logistic equation,Richard equation and Korf equation),make a changeable density growth equation. Through the comparing and analysing, chooses the Korf equation as the volume-increment of whole woods model on Fokienia Hodginsii planted forest financial maturity research.Second, determining the plant timber structure and the timber quantity, calculates plant timber outturn is an important process.Using taper function to determine cubic-volume outturn is an important method and has the good serviceability. According to the wooden material, this paper establishes the invariable parameter taper equation estimative model, as well as through the plant diameter distribution estimative model and the relative tree height model, and calculate various timber outturn of Fokienia Hodginsii planted forest, and build the foundation for calculateing the economical maturity.Third, calculates the economical mature age of Fokienia Hodginsii planted forest through some commonly used economical mature appraisal target . First, simply introducing several commonly used economy mature formula: The forest land expected value method, net present value method,discount rate method and so on ,and comparing the good and bad points. Through the greatest annual mean currency harvest yield angle, introduces the derive of annual mean net-income method. Contrasting with other commonly used economic evaluation target methods, find annual mean net-income method may estimate the forest economical mature situation accurately .Finally, surveys economical mature situation of Fokienia Hodginsii planted forest of different vertical type, and from the forest own growth rule aspect, mainly analyzes the rule of the gross income in money, the net income and the annual mean currency net income which change along with the vertical type changeing, simultaneously discusses the influences to Fokienia Hodginsii planted forest economy mature of changeing of timber price, cost, interest rate and so on ,the external economy target.In addition has also analyzed Fokienia Hodginsii planted forest economy mature law of value motion as well as the relationship between economy mature and quantity mature.