Analysis On Natural Regeneration Of Spruce-Fir Mixed Stands And Seedlings Characteristics Of Changbai Mountains

Natural Spruce-Fir Mixed Stand was the most universal forest type in temperate zero and Frigid Zone in China. It not only supplied various timber products, but also was very important materials of industry of paper and artificial fibre; because of its high altitude it played an important role in water and soil conservation, maintaining ecological balance. This paper selected the natural spruce-fir mixed stands in Wangqing Forestry Bureau and Baihe Forestry Bureau Jilin province as a research object.57 standard plot were settled. Through analysis and comparison, 3 factors were superior among 9 factors. That was stand volume, altitude and thickness of humus.Then the author analyzed the seedlings distribution, age and height structure. The relation between base diameter and the breath-height diameter was researched. All diameter class distribution was modeled with mathematical methods. The results showed modeling were desirable. From the number distribution of all stand, the conclusion was got, which was that the forest of this area could finish the natural succession and reached the goal of sustainable forest management.