A Study On The Distributed Growth Model Of Chinese Fir Based On Gis And Rs

The situation of tree growth is affected by genetic factors of itself, and the environmental conditions around it on the other hand. The correct analysis and research on the influencing rules of all kinds of the site factors, and the building of distributed growth model on Chinese fir will guide us to choose the suited land to plant trees, and make our forest management more efficiently. In this research, building the distributed model of Chinese fir based on GIS is the goal. First of all, obtain the primary volume model between the stand age and the volume by the measured data. And then, analyse the influence level of the stand's site conditions, including the slope, elevation, the slope length, the slope position, soil condition, and slope_shape, solar radiation, combining the biological characteristics of Chinese fir, to establish the system of their own influence on the growth. Finally, get the comprehensive factor, with which the primary volume model could be rectified by the stand's site. So under the new model, the growth of Chinese fir volume will differ with different environment. It is also meet the requirement of the development of precision forestry. At last, extract vegetation index through the remote sensing image, and use the field_measured data to test the model and carry out the precision evaluation. The establishing of the volume model will benifit the foresters to afforest, know the forest growth and spatial structure information well, and also provide a good decision-making support, finally help realize the healthy and sustainable management of forest.