Abstract: Measuring felled tree stumps and wood volume is an important measure in forestry production.Usually the deviation of one-way tree volume table based on the diameter of stumps would easily cause a bias distortion for surveying data and eventually lead to mistakes for decision making.Making full use of stump information and establishment of ternary variable mathematical model help improve the accuracy and reliability of forest resources survey data,which provides a more actual mathematical model for relevant scientific decision-making.

Key words: fallen wood, wood volume, mathematical model