Analysis And Prediction On The Change Law Of Out Put Of Wood Sort For Cunninghamia Lanceolata Plantations

The utilization of Cunninghamia lanceolata wood is closely related to estabish the ecology and economy in China. With the rapidly increasing of the Chinese market economy,Cunninghamia lanceolatare source is also developed greatly. At the same time, it would be beneficial to Master the changes of Material structure on the operation and management of Cunninghamia lanceolata.In this paper, the analysis of material structural laws of Cunninghamia lanceolataare reviewed, and also the stand of Cunninghamia lanceolataand the material structure prediction.For current forestry workers,it is urgently needed to address the problem that provide scientific guidance on development business about the plantation.At present, the quality research of Cunninghamia lanceolata plantation techniques both at home and abroad are planted on trees stand about high and diameter at breast height,mainly through the research of wood per timber-produced rate, and stand for each caliber structure rules less of log on the entire structure, the change rule of the impact factor was also less attention. This paper analyzes the structure of Cunninghamia lanceolata plantation,and shows the present situation of the research. The relevant mathematical models of the rule of Cunninghamia lanceolataare established, the plantation structure are predicted. In the research, the process of Cunninghamia lanceolata forest structure rules and the structure of the distribution law stand also for material goods structure rules, economic structure rules, and the diameter of material log structure would be analized. Based on which, the mathematical model and the structure and stand size order is planted about the change of the structure in the whole forest. And the material planted structure rate table is presented, and then the law of structure prediction on realizing artificial forest of Cunninghamia lanceolata; Use of Cunninghamia lanceolataplantation sample wood different parts of the data measured in diameter, trying to analyze the different parts of the change rule of shape parameters. Combined with its changes in relative height, to establish a different corresponding taper equation. At the same time, through the establishment of tree height curve model and other auxiliary model for the Cunninghamia lanceolata, the plantation stand structure rules are predicted.