| At present,Shaowuwei's state-owned forest farm has a considerable area of artificial Chinese fir forest for more than 20 years.When such a plantation forest is harvested,this is a matter of' great concern and a problem to be solved.For this reason,Shaowu Guoyou Forest Farm The design data of the annual cutting area of Chinese fir plantation were comprehensively analyzed,and the growth process and maturity age were studied.On this basis,the optimal harvesting age was determined.Because the annual growth of Chinese fir is different under different growth conditions,the maximum annual growth of Chinese fir is different.Therefore,the economic maturity of Chinese fir under different growing conditions is different.According to the harvesting age,different management The age of the main cutting of Chinese fir is fixed,and there is a large deviation between the theoretical data and the actual data,which makes the cutting of Chinese fir a great waste.Nowadays,the operation of the main cutting age of Chinese fir is too extensive,the management mode is relatively lagging,and the ages of the main cutting areas are different.In order to adhere to sustainable development,the management mode of the forest farm is further optimized,and the competitiveness of the forest farm in the timber commodity market is strengthened.The requirements for forest management in the new era,according to different growth environments,determine the economic maturity of the intensive Chinese fir medium-sized timber to reduce the human and material resources,timber resources and waste of land resources caused by premature harvesting or late harvesting..This study is based on the actual survey data of the past year's cutting area survey.According to the forest farm management type,it is the fir planting environment of intensive Chinese fir medium diameter.Based on the quantity maturity,based on economic maturity,Chopman-Richards function is selected.The net present value is obtained by the discounted value method,and the economic mature age of the Chinese fir,which is the medium-sized timber of the Chinese fir,is determined by the maximum net present value,and the main cutting ageis determined to improve the profit efficiency of the forest farm.The final conclusion is as follows:(1)With the improvement of site quality,the economic maturity level calculated by each method is advanced;with the increase of social interest rate,the economic mature age determined by the net present value method and the land expectation price method are also advanced.On the contrary,the economic mature age determined by the net present value method and the land expectation price method will be postponed;no matter which method is used,the determination of the economic maturity level is affected by the change in net income,which is reflected in the rise of net income.High and advanced,the law of pure income is reduced and delayed.Therefore,choosing a better site quality will help improve the overall economic benefits of the forest farm.(2)The average growth of Chinese fir plantation in Fujian Province reached its maximum 14 years ago;the second type reached its maximum 17 years ago;the third type appeared after 18 years,with the highest average growth year.As a mature age,combined with the analysis of the economic maturity of Chinese fir forest,the main cutting age of Chinese fir plantation is different due to the different site quality.The main cutting age is 13 years,and the second type is 16 years.The following is 20 years later... |
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